Telit Communications S p A LE910NA LTE/3G/2G Module User Manual HE910 Hardware User Guide

Telit Communications S.p.A. LTE/3G/2G Module HE910 Hardware User Guide

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LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Applicability Table

PRODUCT

LE910-EUG

LE910-NAG

LE910-NVG

LE910-SVG

LE910-SKG

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

Notice

While reasonable efforts have been made to assure the accuracy of this document, Telit assumes

no liability resulting from any inaccuracies or omissions in this document, or from use of the

information obtained herein. The information in this document has been carefully checked and is

believed to be entirely reliable. However, no responsibility is assumed for inaccuracies or

omissions. Telit reserves the right to make changes to any products described herein and

reserves the right to revise this document and to make changes from time to time in content

hereof with no obligation to notify any person of revisions or changes. Telit does not assume

any liability arising out of the application or use of any product, software, or circuit described

herein; neither does it convey license under its patent rights or the rights of others.

It is possible that this publication may contain references to, or information about Telit products

(machines and programs), programming, or services that are not announced in your country.

Such references or information must not be construed to mean that Telit intends to announce

such Telit products, programming, or services in your country.

Copyrights

This instruction manual and the Telit products described in this instruction manual may be,

include or describe copyrighted Telit material, such as computer programs stored in

semiconductor memories or other media. Laws in the Italy and other countries preserve for Telit

and its licensors certain exclusive rights for copyrighted material, including the exclusive right

to copy, reproduce in any form, distribute and make derivative works of the copyrighted

material. Accordingly, any copyrighted material of Telit and its licensors contained herein or in

the Telit products described in this instruction manual may not be copied, reproduced,

distributed, merged or modified in any manner without the express written permission of Telit.

Furthermore, the purchase of Telit products shall not be deemed to grant either directly or by

implication, estoppel, or otherwise, any license under the copyrights, patents or patent

applications of Telit, as arises by operation of law in the sale of a product.

Computer Software Copyrights

The Telit and 3rd Party supplied Software (SW) products described in this instruction manual

may include copyrighted Telit and other 3rd Party supplied computer programs stored in

semiconductor memories or other media. Laws in the Italy and other countries preserve for Telit

and other 3rd Party supplied SW certain exclusive rights for copyrighted computer programs,

including the exclusive right to copy or reproduce in any form the copyrighted computer

program. Accordingly, any copyrighted Telit or other 3rd Party supplied SW computer programs

contained in the Telit products described in this instruction manual may not be copied (reverse

engineered) or reproduced in any manner without the express written permission of Telit or the

3rd Party SW supplier. Furthermore, the purchase of Telit products shall not be deemed to grant

either directly or by implication, estoppel, or otherwise, any license under the copyrights,

patents or patent applications of Telit or other 3rd Party supplied SW, except for the normal

non-exclusive, royalty free license to use that arises by operation of law in the sale of a product.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Usage and Disclosure Restrictions

License Agreements

The software described in this document is the property of Telit and its licensors. It is furnished

by express license agreement only and may be used only in accordance with the terms of such

an agreement.

Copyrighted Materials

Software and documentation are copyrighted materials. Making unauthorized copies is

prohibited by law. No part of the software or documentation may be reproduced, transmitted,

transcribed, stored in a retrieval system, or translated into any language or computer language,

in any form or by any means, without prior written permission of Telit

High Risk Materials

Components, units, or third-party products used in the product described herein are NOT fault-

tolerant and are NOT designed, manufactured, or intended for use as on-line control equipment

in the following hazardous environments requiring fail-safe controls: the operation of Nuclear

Facilities, Aircraft Navigation or Aircraft Communication Systems, Air Traffic Control, Life

Support, or Weapons Systems (High Risk Activities"). Telit and its supplier(s) specifically

disclaim any expressed or implied warranty of fitness for such High Risk Activities.

Trademarks

TELIT and the Stylized T Logo are registered in Trademark Office. All other product or service

names are the property of their respective owners.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

1 INTRODUCTION ......................................................................................................................................................... 7

1.1 SCOPE ................................................................................................................................................................................ 7

1.2 AUDIENCE ........................................................................................................................................................................... 7

1.3 CONTACT INFORMATION, SUPPORT .......................................................................................................................................... 7

1.4 DOCUMENT ORGANIZATION ................................................................................................................................................... 8

1.5 TEXT CONVENTIONS .............................................................................................................................................................. 9

1.6 RELATED DOCUMENTS ........................................................................................................................................................... 9

1.7 DOCUMENT HISTORY .......................................................................................................................................................... 10

2 OVERVIEW .............................................................................................................................................................. 11

3 LE910 MODULE CONNECTIONS................................................................................................................................ 12

3.1 PIN-OUT ......................................................................................................................................................................... 12

3.1.1 LGA Pads Layout ..................................................................................................................................................... 17

4 HARDWARE COMMANDS ........................................................................................................................................ 18

4.1 TURNING ON THE LE910 .................................................................................................................................................... 18

4.2 INITIALIZATION AND ACTIVATION STATE................................................................................................................................... 20

4.3 TURNING OFF THE LE910 ................................................................................................................................................... 21

4.3.1 Shutdown by Software Command .......................................................................................................................... 21

4.3.2 Hardware Shutdown .............................................................................................................................................. 22

4.4 LE910 UNCONDITIONAL SHUTDOWN ..................................................................................................................................... 23

4.5 SUMMARY OF TURNING ON AND OFF THE MODULE ................................................................................................................. 26

5 POWER SUPPLY ....................................................................................................................................................... 27

5.1 POWER SUPPLY REQUIREMENTS ............................................................................................................................................ 27

5.2 POWER CONSUMPTION ....................................................................................................................................................... 28

5.3 GENERAL DESIGN RULES ...................................................................................................................................................... 29

5.3.1 Electrical Design Guidelines ................................................................................................................................... 29

5.3.2 Thermal Design Guidelines ..................................................................................................................................... 33

5.3.3 Power Supply PCB layout Guidelines ...................................................................................................................... 34

6 GSM/WCDMA/LTE RADIO SECTION......................................................................................................................... 36

6.1 LE910 PRODUCT VARIANTS ................................................................................................................................................. 36

6.2 TX OUTPUT POWER ............................................................................................................................................................ 36

6.3 GSM/WCDMA/LTE ANTENNA REQUIREMENTS .................................................................................................................... 37

6.4 GSM/WCDMA/LTE - PCB LINE GUIDELINES ......................................................................................................................... 40

6.5 GSM/WCDMA/LTE ANTENNA - INSTALLATION GUIDELINES .................................................................................................... 41

6.6 ANTENNA DIVERSITY REQUIREMENTS ..................................................................................................................................... 41

7 GNSS RECEIVER ....................................................................................................................................................... 43

7.1 GNSS SIGNALS PINOUT ....................................................................................................................................................... 43

7.2 GPS/GLONASS ANTENNA REQUIREMENTS ............................................................................................................................ 43

7.2.1 GNSS Antenna - PCB Line Guidelines ...................................................................................................................... 44

7.2.2 RF Trace Losses....................................................................................................................................................... 44

7.2.3 GNSS Antenna - Installation ................................................................................................................................... 45

8 LOGIC LEVEL SPECIFICATIONS .................................................................................................................................. 46

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

9 UNCONDITIONAL SHUTDOWN ................................................................................................................................ 47

10 USB PORT ................................................................................................................................................................ 48

10.1 USB 2.0 HS DESCRIPTION ................................................................................................................................................. 48

11 SERIAL PORTS .......................................................................................................................................................... 49

11.1 MODEM SERIAL PORT 1 ............................................................................................................................................... 50

11.2 MODEM SERIAL PORT 2 (USIF1) ................................................................................................................................... 51

11.3 RS232 LEVEL TRANSLATION ................................................................................................................................................ 52

12 AUDIO SECTION OVERVIEW .................................................................................................................................... 54

12.1 ELECTRICAL CHARACTERISTICS ............................................................................................................................................. 54

13 GENERAL PURPOSE I/O ........................................................................................................................................... 55

13.1 GPIO LOGIC LEVELS .......................................................................................................................................................... 56

13.2 USING A GPIO PAD AS INPUT ........................................................................................................................................... 56

13.3 USING A GPIO PAD AS OUTPUT ........................................................................................................................................ 56

13.4 INDICATION OF NETWORK SERVICE AVAILABILITY ..................................................................................................................... 57

13.5 RTC BYPASS OUT ............................................................................................................................................................. 58

13.6 VAUX POWER OUTPUT ..................................................................................................................................................... 58

13.7 ADC CONVERTER ............................................................................................................................................................. 59

13.7.1 Description ........................................................................................................................................................... 59

13.7.2 Using ADC Converter ............................................................................................................................................ 59

14 MOUNTING THE LE910 ON THE APPLICATION ......................................................................................................... 60

14.1 GENERAL ........................................................................................................................................................................ 60

14.2 MODULE FINISHING & DIMENSIONS ..................................................................................................................................... 60

14.3 RECOMMENDED FOOT PRINT FOR THE APPLICATION ................................................................................................................. 62

14.4 STENCIL .......................................................................................................................................................................... 63

14.5 PCB PAD DESIGN .............................................................................................................................................................. 63

14.6 PCB PAD DIMENSIONS ....................................................................................................................................................... 64

14.7 SOLDER PASTE .................................................................................................................................................................. 66

14.7.1 LE910 Solder reflow .............................................................................................................................................. 66

14.8 PACKING SYSTEM (TRAY) .................................................................................................................................................... 68

14.9 PACKING SYSTEM (REEL) .................................................................................................................................................... 70

14.9.1 Carrier Tape Detail ............................................................................................................................................... 70

14.9.2 Reel Detail ............................................................................................................................................................ 71

14.9.3 Packaging Detail .................................................................................................................................................. 72

14.10 MOISTURE SENSITIVITY .................................................................................................................................................... 72

15 SAFETY RECOMMANDATIONS ................................................................................................................................. 73

16 CONFORMITY ASSESSMENT ISSUES ......................................................................................................................... 74

16.1 1999/5/EC DIRECTIVE ..................................................................................................................................................... 74

16.2 FCC/IC REGULATORY NOTICES ............................................................................................................................................ 77

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The aim of this document is the description of some hardware solutions useful for developing a

product with the Telit LE910 module.

This document is intended for Telit customers, who are integrators, about to implement their

applications using our LE910 modules.

For general contact, technical support, to report documentation errors and to order manuals,

contact Telit’s Technical Support Center (TTSC) at:

TS-EMEA@telit.com

TS-NORTHAMERICA@telit.com

TS-LATINAMERICA@telit.com

TS-APAC@telit.com

Alternatively, use:

http://www.telit.com/en/products/technical-support-center/contact.php

For detailed information about where you can buy the Telit modules or for recommendations on

accessories and components visit:

http://www.telit.com

To register for product news and announcements or for product questions contact Telit’s

Technical Support Center (TTSC).

Our aim is to make this guide as helpful as possible. Keep us informed of your comments and

suggestions for improvements.

Telit appreciates feedback from the users of our information.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

This document contains the following chapters:

Chapter 1: “Introduction” provides a scope for this document, target audience, contact and

support information, and text conventions.

Chapter 2: “Overview” provides an overview of the document.

Chapter3: “LE910 Module Connections” deals with the pin out configuration and layout.

Chapter 4: “Hardware Commands” How to operate on the module via hardware.

Chapter 5: “Power supply” Power supply requirements and general design rules.

Chapter 6: “GSM/WCDMA Radio” The antenna connection and board layout design are the

most important parts in the full product design.

Chapter 7: “GNSS Receiver” This section describes the GNSS receiver.

Chapter 8: “Logic Level specifications” Specific values adopted in the implementation of logic

levels for this module.

Chapter 9: “USB Port” The USB port on the Telit LE910 is the core of the interface between the

module and OEM hardware

Chapter 10: “SPI port” Refers to the SPI port of the Telit LE910

Chapter 11: “Serial ports” Refers to the serial ports of the Telit LE910

Chapter 12: “Audio Section overview” Refers to the audio blocks of the Base Band Chip of the

LE910 Telit Modules.

Chapter 13: “General Purpose I/O” How the general purpose I/O pads can be configured.

Chapter 14: “Mounting the LE910 on the application board” Mechanical dimensions and

recommendations on how to mount the module on the user’s board.

Chapter 15: “Safety Recommendations” Information related to the Safety topics.

Chapter 16: “Conformity Assessment Issues” Information related to the Conformity

Assessments.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Danger – This information MUST be followed or catastrophic equipment failure or bodily

injury may occur.

Caution or Warning – Alerts the user to important points about integrating the module, if

these points are not followed, the module and end user equipment may fail or malfunction.

Tip or Information – Provides advice and suggestions that may be useful when integrating

the module.

All dates are in ISO 8601 format, i.e. YYYY-MM-DD.

 LE910 Product description 80421ST10587a

 SIM Holder Design Guides 80000NT10001a

 AT Commands Reference Guide 80421ST10585A

 Telit EVK2 User Guide 1vv0300704

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

ISSUE#0

2013-11-07

Preliminary Version

ISSUE#1

2013-12-20

Updated schematics & tray drawing;

ISSUE#2

2014-05-12

Added LE910-SVG and LE910-SKG; LE910-EUG now Dual Band 2G

(900/1800); added B5 WCDMA on LE910-EUG.

ISSUE#3

2014-06-19

Added Conformity assessment issues section for LE910-NVG, SVG and

NAG; updated chapter 10 (USB).

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The aim of this document is the description of some hardware solutions useful for developing a

product with the Telit LE910 module.

In this document all the basic functions of a mobile phone will be taken into account; for each

one of them a proper hardware solution will be suggested and eventually the wrong solutions

and common errors to be avoided will be evidenced. Obviously this document cannot embrace

the whole hardware solutions and products that may be designed. The wrong solutions to be

avoided shall be considered as mandatory, while the suggested hardware configurations shall not

be considered mandatory, instead the information given shall be used as a guide and a starting

point for properly developing your product with the Telit LE910 module. For further hardware

details that may not be explained in this document refer to the Telit LE910 Product Description

document where all the hardware information is reported.

NOTICE:

(EN) The integration of the GSM/GPRS/WCDMA/LTE LE910 cellular module within user application

shall be done according to the design rules described in this manual.

(IT) L’integrazione del modulo cellulare GSM/GPRS/WCDMA/LTE LE910 all’interno dell’applicazione

dell’utente dovrà rispettare le indicazioni progettuali descritte in questo manuale.

(DE) Die Integration des LE910 GSM/GPRS/WCDMA/LTE Mobilfunk-Moduls in ein Gerät muß gemäß

der in diesem Dokument beschriebenen Kunstruktionsregeln erfolgen.

(SL) Integracija GSM/GPRS/WCDMA/LTE LE910 modula v uporabniški aplikaciji bo morala upoštevati

projektna navodila, opisana v tem priročniku.

(SP) La utilización del modulo GSM/GPRS/WCDMA/LTE LE910 debe ser conforme a los usos para los

cuales ha sido deseñado descritos en este manual del usuario.

(FR) L’intégration du module cellulaire GSM/GPRS/WCDMA/LTE LE910 dans l’application de

l’utilisateur sera faite selon les règles de conception décrites dans ce manuel.

(HE)

The information presented in this document is believed to be accurate and reliable. However, no

responsibility is assumed by Telit Communications S.p.A. for its use, nor any infringement of patents or

other rights of third parties which may result from its use. No license is granted by implication or

otherwise under any patent rights of Telit Communications S.p.A. other than for circuitry embodied in

Telit products. This document is subject to change without notice.

LE910

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

PAD

Signal

I/O

Function

Type

COMMENT

USB HS 2.0 COMMUNICATION PORT

B15

USB_D+

I/O

USB differential Data (+)

C15

USB_D-

I/O

USB differential Data (-)

A13

VUSB

Power sense for the internal USB

transceiver.

Asynchronous Serial Port (USIF0) – Prog. / Data + HW Flow Control

N15

C103/TXD

Serial data input from DTE

CMOS 1.8V

M15

C104/RXD

Serial data output to DTE

CMOS 1.8V

M14

C108/DTR

Input for (DTR) from DTE

CMOS 1.8V

L14

C105/RTS

Input for Request to send signal

(RTS) from DTE

CMOS 1.8V

P15

C106/CTS

Output for Clear to Send signal

(CTS) to DTE

CMOS 1.8V

N14

C109/DCD

Output for (DCD) to DTE

CMOS 1.8V

P14

C107/DSR

Output for (DSR) to DTE

CMOS 1.8V

R14

C125/RING

Output for Ring (RI) to DTE

CMOS 1.8V

Asynchronous Auxiliary Serial Port (USIF1)

D15

TX_AUX

Auxiliary UART (TX Data to DTE)

CMOS 1.8V

E15

RX_AUX

Auxiliary UART (RX Data from

DTE)

CMOS 1.8V

SIM card interface

SIMCLK

External SIM signal – Clock

1.8 / 3V

SIMRST

External SIM signal – Reset

1.8 / 3V

SIMIO

I/O

External SIM signal – Data I/O

1.8 / 3V

SIMIN

External SIM signal – Presence

(active low)

CMOS 1.8

SIMVCC

External SIM signal – Power supply

for the SIM

1.8 / 3V

Digital Voice Interface (DVI)

DVI_WA0

I/O

Digital Audio Interface (WA0)

1.8V

DVI_RX

Digital Audio Interface (RX)

1.8V

DVI_TX

I/O

Digital Audio Interface (TX)

1.8V

DVI_CLK

I/O

Digital Audio Interface (CLK)

1.8V

DIGITAL IO

GPIO_01

I/O

GPIO_01 /STAT LED

CMOS 1.8V

Alternate Function STAT LED

GPIO_02

I/O

GPIO_02

CMOS 1.8V

C10

GPIO_03

I/O

GPIO_03

CMOS 1.8V

C11

GPIO_04

I/O

GPIO_04

CMOS 1.8V

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

B14

GPIO_05

I/O

GPIO_05

CMOS 1.8V

C12

GPIO_06

I/O

GPIO_06

CMOS 1.8V

C13

GPIO_07

I/O

GPIO_07

CMOS 1.8V

K15

GPIO_08

I/O

GPIO_08

CMOS 1.8V

L15

GPIO_09

I/O

GPIO_09

CMOS 1.8V

G15

GPIO_10

I/O

GPIO_10

CMOS 1.8V

ADC

ADC_IN1

Analog / Digital converter input

A/D

RF SECTION

ANTENNA

I/O

GSM/EDGE/UMTS Antenna

(50 ohm)

ANT_DIV

Antenna Diversity Input

(50 ohm)

GNSS SECTION (see NOTE1)

ANT_GNSS

GNSS Antenna (50 ohm)

GNSS_LNA_EN

Output enable for External LNA

supply

CMOS 1.8V

Miscellaneous Functions

R13

HW_SHUTDOWN*

HW Unconditional Shutdown

1.8V

Active low

R12

ON_OFF*

Input command for power ON

1.8V

Active low

C14

VRTC

VRTC Backup capacitor

Power

backup for the embedded RTC supply

R11

VAUX/PWRMON

Supply Output for external

accessories / Power ON Monitor

1.8V

Power Supply

VBATT

Main power supply (Baseband)

Power

VBATT

Main power supply (Baseband)

Power

VBATT_PA

Main power supply (Radio PA)

Power

VBATT_PA

Main power supply (Radio PA)

Power

VBATT_PA

Main power supply (Radio PA)

Power

VBATT_PA

Main power supply (Radio PA)

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

GND

Ground

Power

P10

GND

Ground

Power

R10

GND

Ground

Power

M12

GND

Ground

Power

B13

GND

Ground

Power

P13

GND

Ground

Power

E14

GND

Ground

Power

RESERVED

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

RESERVED

A10

RESERVED

N10

RESERVED

N11

RESERVED

P11

RESERVED

B12

RESERVED

D12

RESERVED

N12

RESERVED

P12

RESERVED

F14

RESERVED

G14

RESERVED

H14

RESERVED

J14

RESERVED

K14

RESERVED

N13

RESERVED

L13

RESERVED

J13

RESERVED

M13

RESERVED

K13

RESERVED

H13

RESERVED

G13

RESERVED

F13

RESERVED

A11

RESERVED

A12

RESERVED

B11

RESERVED

B10

RESERVED

D14

RESERVED

A14

RESERVED

D13

RESERVED

E13

RESERVED

F15

RESERVED

H15

RESERVED

J15

RESERVED

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

WARNING:

Reserved pins must not be connected.

If not used, almost all pins should be left disconnected. The only exceptions are the following

pins:

RTS pin should be connected to the GND (on the module side) if flow control is not used.

The above pins are also necessary to debug the application when the module is assembled on it so we

recommend connecting them also to dedicated test point.

PAD

Signal

Notes

M1,M2,N1,N2,P1,P2

VBATT & VBATT_PA

E1,G1,H1,J1,L1,A2,E2,F2,G2,H2,

J2,K2,L2,R2,M3,N3,P3,R3,D4,M4,

N4,P4,R4,N5,P5,R5,N6,P6,R6,P8,

R8,P9,P10,R10,M12,B13,P13,E14

GND

R12

ON/OFF*

R13

HW_SHUTDOWN*

B15

USB_D+

If not used should be connected to a

Test Point or an USB connector

C15

USB_D-

If not used should be connected to a

Test Point or an USB connector

A13

VUSB

If not used should be connected to a

Test Point or an USB connector

N15

C103/TXD

If not used should be connected to a

Test Point

M15

C104/RXD

If not used should be connected to a

Test Point

D15

TXD_AUX

If not used should be connected to a

Test Point

E15

RXD_AUX

If not used should be connected to a

Test Point

MAIN ANTENNA

ANT_DIV

ANT_GNSS

If the GNSS is not used it could be

left unconnected

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

ADC_IN1

RES

GND

ANT_DIV

GND

ANT

GND

VBATT

VBATT_

GND

RES

GND

VBATT

VBATT_

GND

SIMVC

RES

GND

SIMIN

RES

GND

SIMIO

RES

GND

SIMCLK

DVI_RX

RES

GND

SIMRS

DVI_TX

RES

GNSS_L

NA_EN

RES

DVI_CLK

GPIO_01

RES

GND

RES

DVI_WA

GPIO_02

RES

GND

ANT_GN

RES

GPIO_03

RES

GND

RES

GPIO_04

RES

VAUX/P

WRMON

RES

GPIO_06

RES

GND

RES

ON_OFF

VUSB

GND

GPIO_07

VDD_IO

1V8_SEL

RES

GND

HW_SH

UTDOW

RES

GPIO_05

VRTC

RES

GND

RES

C105/RT

C108/DT

C109/DC

C107/DS

C125/RI

USB_D+

USB_D-

TX AUX

RX AUX

RES

GPIO_10

RES

GPIO_08

GPIO_09

C104/RX

C103/TX

C106/CT

NOTE:

The pin defined as RES has to be considered RESERVED and not connected on any pin in the

application.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

To turn on the LE910 the pad ON_OFF* must be tied low for at least 1 seconds and then

released.

The maximum current that can be drained from the ON_OFF* pad is 0,1 mA.

A simple circuit to do it is:

NOTE:

Don’t use any pull up resistor on the ON_OFF* line, it is internally pulled up. Using pull up

resistor may bring to latch up problems on the LE910 power regulator and improper power

on/off of the module. The line ON_OFF* must be connected only in open collector or open

drain configuration.

NOTE:

In this document all the lines that are inverted, hence have active low signals are labelled with a

name that ends with”#”,”*” or with a bar over the name.

TIP:

To check if the device has powered on, the hardware line PWRMON should be monitored.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

For example:

1- Let’s assume you need to drive the ON_OFF* pad with a totem pole output of a +3/5 V

microcontroller (uP_OUT1):

2- Let’s assume you need to drive the ON_OFF* pad directly with an ON/OFF button:

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Upon turning on LE910 module, The LE910 is not activated yet because the boot sequence of

LE910 is still going on internally. It takes about 10 seconds to complete the initializing the

module internally.

For this reason, it would be useless to try to access LE910 during the Initialization state as

below.

To get the desirable stability, the LE910 needs at least 15 seconds after the PWRMON goes high

to become operational by reaching the activation state.

NOTE:

Don’t use any pull up resistor on the ON_OFF* line, it is internally pulled up. Using pull up

resistor may bring to latch up problems on the LE910 power regulator and improper power

on/off of the module. The line ON_OFF* must be connected only in open collector or open

drain configuration.

In this document all the lines that are inverted, hence have active low signals are labelled with a

name that ends with”#”,”*” or with a bar over the name.

During the Initialization state, any kind of AT-command is not available. DTE must be waiting

for the Activation state to communicate with LE910.

To check if the device has powered on, the hardware line PWRMON should be monitored.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Turning off of the device can be done in two ways:

 via AT command (see LE910 Software User Guide, AT#SHDN)

 by tying low pin ON_OFF*

Either ways, the device issues a detach request to network informing that the device will not

be reachable any more.

LE910 can be shut down using the AT#SHDN command.

When a shutdown command is sent, LE910 goes into the finalization state and finally will shut

down PWRMON at the end of this state.

The period of the finalization state can differ according to the situation in which the LE910 is so

it cannot be fixed definitely.

Normally it will be above 15 seconds later from sending a shutdown command and DTE should

monitor the status of PWRMON to see the actual power off.

TIP:

To check if the device has been powered off, the hardware line PWRMON must be monitored.

The device is powered off when PWRMON goes low.

NOTE:

In order to avoid a back powering effect it is recommended to avoid having any HIGH logic

level signal applied to the digital pins of the LE910 when the module is powered off or during

an ON/OFF transition.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

To turn OFF LE910 the pad ON/OFF# must be tied low for at least 2 seconds and then

released. Same circuitry and timing for the power on must be used.

When the hold time of ON/OFF# is above 2 seconds, LE910 goes into the finalization state

and finally will shut down PWRMON at the end of this state.

The period of the finalization state can differ according to the situation in which the LE910 is

so it cannot be fixed definitely.

Normally it will be above 15 seconds later from releasing ON/OFF# and DTE should monitor

the status of PWRMON to see the actual power off.

TIP:

To check if the device has been powered off, the hardware line PWRMON must be monitored.

The device is powered off when PWRMON goes low.

NOTE:

In order to avoid a back powering effect it is recommended to avoid having any HIGH logic

level signal applied to the digital pins of the LE910 when the module is powered off or during

an ON/OFF transition.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The Unconditional Shutdown of the module could be activated using the

HW_SHUTDOWN* line (pad R13).

WARNING:

The hardware unconditional Shutdown must not be used during normal operation of the device

since it does not detach the device from the network. It shall be kept as an emergency exit

procedure.

To unconditionally shutdown the LE910, the pad HW_SHUTDOWN* must be tied low for at

least 200 milliseconds and then released.

NOTE:

Do not use any pull up resistor on the HW_SHUTDOWN* line nor any totem pole digital

output. Using pull up resistor may bring to latch up problems on the LE910 power regulator and

improper functioning of the module. The line HW_SHUTDOWN* must be connected only in

open collector configuration.

The HW_SHUTDOWN* is generating an unconditional shutdown of the module without an

automatic restart.

The module will shutdown, but will NOT perform the detach from the cellular network.

To proper power on again the module please refer to the related paragraph (“Powering ON the

HE910”)

TIP:

The unconditional hardware shutdown must always be implemented on the boards and should be

used only as an emergency exit procedure.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

A typical circuit is the following:

For example:

1- Let us assume you need to drive the HW_SHUTDOWN* pad with a totem pole output of

a +3/5 V microcontroller (uP_OUT2):

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The below flow chart is describing the HW Shutdown procedure:

“HW SHUTDOWN

Unconditional”

START

HW_SHDN = LOW

Delay 200ms

HW_SHDN = HIGH

PWRMON = ON

Delay 1s

Disconnect

VBATT

“HW SHUTDOWN

Unconditional”

END

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Below chart describes the overall sequences for Turning ON and OFF.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The power supply circuitry and board layout are a very important part in the full product design

and they strongly reflect on the product overall performances, hence read carefully the

requirements and the guidelines that will follow for a proper design.

The external power supply must be connected to VBATT & VBATT_PA signals and must fulfil

the following requirements:

POWER SUPPLY

Nominal Supply Voltage

3.8 V

Normal Operating Voltage Range

3.40 V÷ 4.20 V

Extended Operating Voltage Range

3.30 V÷ 4.20 V

NOTE:

The Operating Voltage Range MUST never be exceeded; care must be taken when designing the

application’s power supply section to avoid having an excessive voltage drop.

If the voltage drop is exceeding the limits it could cause a Power Off of the module.

The Power supply must be higher than 3.3 V to power on the module

NOTE:

Overshoot voltage (regarding MAX Extended Operating Voltage) and drop in voltage

(regarding MIN Extended Operating Voltage) MUST never be exceeded;

The “Extended Operating Voltage Range” can be used only with completely assumption and

application of the HW User guide suggestions.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

LE910 current consumption

Mode

Average (mA)

Mode description

SWITCHED OFF

Module supplied but Switched Off

Switched Off

40uA

IDLE mode (GSM/EDGE)

AT+CFUN=1

WCDMA

Normal mode: full functionality of the module

GSM

LTE

AT+CFUN=4

Disabled TX and RX; module is not registered on the

network

AT+CFUN=5

WCDMA

1.7

Full functionality with power saving;

GSM

1.9

Operative mode (LTE)

LTE (0dBm)

203

LTE data call (channel BW 5MHz, RB=1, TX=0dBm)

LTE (22dBm)

540

LTE data call (channel BW 5MHz, RB=1, TX=22dBm)

Operative mode (WCDMA)

WCDMA Voice

185

WCDMA voice call (TX = 10dBm)

WCDMA HSDPA (0dBm)

100

WCDMA data call (RMC, TX = 0dBm)

WCDMA HSDPA (22dBm)

390

WCDMA data call (RMC, TX = 22dBm)

Operative mode (EDGE)

EDGE 4TX+1RX

EDGE Sending data mode

LOW Band PL5

255

High Band PL0

240

Operative mode (GSM)

GSM TX and RX mode

GSM VOICE CALL

LOW Band CSD PL5

290

High Band CSD PL0

170

GPRS 4TX+1RX

GPRS Sending data mode

LOW Band PL5

410

High Band PL0

320

The GSM system is made in a way that the RF transmission is not continuous, else it is packed into

bursts at a base frequency of about 216 Hz, and the relative current peaks can be as high as about 2A.

Therefore the power supply has to be designed in order to withstand with these current peaks without

big voltage drops; this means that both the electrical design and the board layout must be designed for

this current flow. If the layout of the PCB is not well designed a strong noise floor is generated on the

ground and the supply; this will reflect on all the audio paths producing an audible annoying noise at

216 Hz; if the voltage drop during the peak current absorption is too much, then the device may even

shutdown as a consequence of the supply voltage drop.

NOTE: The electrical design for the Power supply should be made ensuring it will be capable of

a peak current output of at least 2A.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The principal guidelines for the Power Supply Design embrace three different design steps:

 the electrical design

 the thermal design

 the PCB layout.

The electrical design of the power supply depends strongly from the power source where this

power is drained. We will distinguish them into three categories:

 +5V input (typically PC internal regulator output)

 +12V input (typically automotive)

 Battery

 The desired output for the power supply is 3.8V, hence there’s not a big difference between

the input source and the desired output and a linear regulator can be used. A switching

power supply will not be suited because of the low drop out requirements.

 When using a linear regulator, a proper heat sink shall be provided in order to dissipate the

power generated.

 A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the

current absorption peaks close to the LE910, a 100μF tantalum capacitor is usually suited.

 Make sure the low ESR capacitor on the power supply output (usually a tantalum one) is

rated at least 10V.

 A protection diode should be inserted close to the power input, in order to save the LE910

from power polarity inversion.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

An example of linear regulator with 5V input is:

 The desired output for the power supply is 3.8V, hence due to the big difference between the

input source and the desired output, a linear regulator is not suited and shall not be used. A

switching power supply will be preferable because of its better efficiency especially with the

2A peak current load represented by the LE910.

 When using a switching regulator, a 500kHz or more switching frequency regulator is

preferable because of its smaller inductor size and its faster transient response. This allows

the regulator to respond quickly to the current peaks absorption.

 In any case the frequency and Switching design selection is related to the application to be

developed due to the fact the switching frequency could also generate EMC interferences.

 For car PB battery the input voltage can rise up to 15,8V and this should be kept in mind

when choosing components: all components in the power supply must withstand this

voltage.

 A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the

current absorption peaks, a 100μF tantalum capacitor is usually suited.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

 Make sure the low ESR capacitor on the power supply output (usually a tantalum one) is

rated at least 10V.

 For Car applications a spike protection diode should be inserted close to the power input, in

order to clean the supply from spikes.

 A protection diode should be inserted close to the power input, in order to save the LE910

from power polarity inversion. This can be the same diode as for spike protection.

An example of switching regulator with 12V input is in the below schematic:

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The desired nominal output for the power supply is 3.8V and the maximum voltage

allowed is 4.2V, hence a single 3.7V Li-Ion cell battery type is suited for supplying the

power to the Telit LE910 module.

WARNING:

The three cells Ni/Cd or Ni/MH 3,6 V Nom. Battery types or 4V PB types MUST NOT BE

USED DIRECTLY since their maximum voltage can rise over the absolute maximum voltage

for the LE910 and damage it.

NOTE:

DON’T USE any Ni-Cd, Ni-MH, and Pb battery types directly connected with LE910. Their use

can lead to overvoltage on the LE910 and damage it. USE ONLY Li-Ion battery types.

 A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current

absorption peaks, a 100μF tantalum capacitor is usually suited.

 Make sure the low ESR capacitor (usually a tantalum one) is rated at least 10V.

 A protection diode should be inserted close to the power input, in order to save the LE910 from

power polarity inversion. Otherwise the battery connector should be done in a way to avoid

polarity inversions when connecting the battery.

 The battery capacity must be at least 500mAh in order to withstand the current peaks of 2A; the

suggested capacity is from 500mAh to 1000mAh.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The thermal design for the power supply heat sink should be done with the following

specifications:

 Average current consumption during HSPA transmission @PWR level max in LE910:

640mA (TBD)

 Average current consumption during class12 GPRS transmission @PWR level max:

680mA (TBD)

 Average GPS current during GPS ON (Power Saving disabled) : 65mA (TBD)

NOTE:

The average consumption during transmissions depends on the power level at which the device

is requested to transmit by the network. The average current consumption hence varies

significantly.

The thermal design for the Power supply must be made keeping an average consumption at the

max transmitting level during calls of 640mA(HSPA)/680mA(GPRS) rms plus 65mA rms for

GPS in tracking mode.

Considering the very low current during idle, especially if Power Saving function is enabled, it

is possible to consider from the thermal point of view that the device absorbs current

significantly only during calls.

If we assume that the device stays in transmission for short periods of time (let us say few

minutes) and then remains for quite a long time in idle (let us say one hour), then the power

supply has always the time to cool down between the calls and the heat sink could be smaller

than the calculated for 640mA (HSPA)/680mA (GPRS) maximum RMS current. There could

even be a simple chip package (no heat sink).

Moreover in average network conditions the device is requested to transmit at a lower power

level than the maximum and hence the current consumption will be less than 640mA (HSPA)

/680mA (GPRS) (being usually around 250mA).

For these reasons the thermal design is rarely a concern and the simple ground plane where the

power supply chip is placed can be enough to ensure a good thermal condition and avoid

overheating.

For the heat generated by the LE910, you can consider it to be during transmission 2W max

during class12 GPRS upload. This generated heat will be mostly conducted to the ground plane

under the LE910; you must ensure that your application can dissipate heat.

In the WCDMA/HSPA mode, since LE910 emits RF signals continuously during transmission,

you must pay special attention how to dissipate the heat generated.

The current consumption will be up to about 640mA in HSPA (630mA in WCDMA)

continuously at the maximum TX output power (23dBm). Thus, you must arrange the PCB area

as large as possible under LE910 which you will mount. You must mount LE910 on the large

ground area of your application board and make many ground vias to dissipate the heat.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The peak current consumption in the GSM mode is higher than that in WCDMA. However,

considering the heat sink is more important in case of WCDMA.

As mentioned before, a GSM signal is bursty, thus, the temperature drift is more insensible than

WCDMA. Consequently, if you prescribe the heat dissipation in the WCDMA mode, you don’t

need to think more about the GSM mode.

As seen on the electrical design guidelines the power supply shall have a low ESR capacitor on

the output to cut the current peaks and a protection diode on the input to protect the supply from

spikes and polarity inversion. The placement of these components is crucial for the correct

working of the circuitry. A misplaced component can be useless or can even decrease the power

supply performances.

 The Bypass low ESR capacitor must be placed close to the Telit LE910 power input

pads or in the case the power supply is a switching type it can be placed close to the

inductor to cut the ripple provided the PCB trace from the capacitor to the LE910 is

wide enough to ensure a dropless connection even during the 2A current peaks.

 The protection diode must be placed close to the input connector where the power

source is drained.

 The PCB traces from the input connector to the power regulator IC must be wide

enough to ensure no voltage drops occur when the 2A current peaks are absorbed.

Note that this is not made in order to save power loss but especially to avoid the

voltage drops on the power line at the current peaks frequency of 216 Hz that will

reflect on all the components connected to that supply, introducing the noise floor at

the burst base frequency. For this reason while a voltage drop of 300-400 mV may

be acceptable from the power loss point of view, the same voltage drop may not be

acceptable from the noise point of view. If your application doesn’t have audio

interface but only uses the data feature of the Telit LE910, then this noise is not so

disturbing and power supply layout design can be more forgiving.

 The PCB traces to the LE910 and the Bypass capacitor must be wide enough to

ensure no significant voltage drops occur when the 2A current peaks are absorbed.

This is for the same reason as previous point. Try to keep this trace as short as

possible.

 The PCB traces connecting the Switching output to the inductor and the switching

diode must be kept as short as possible by placing the inductor and the diode very

close to the power switching IC (only for switching power supply). This is done in

order to reduce the radiated field (noise) at the switching frequency (100-500 kHz

usually).

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

 The use of a good common ground plane is suggested.

 The placement of the power supply on the board should be done in such a way to

guarantee that the high current return paths in the ground plane are not overlapped

to any noise sensitive circuitry as the microphone amplifier/buffer or earphone

amplifier.

 The power supply input cables should be kept separate from noise sensitive lines

such as microphone/earphone cables.

 The insertion of EMI filter on VBATT pins is suggested in those designs where

antenna is placed close to battery or supply lines.

A ferrite bead like Murata BLM18EG101TN1 or Taiyo Yuden P/N

FBMH1608HM101 can be used for this purpose.

The below figure shows the recommended circuit:

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The following table is listing the main differences between the LE910 variants:

Product

Supported 2G Bands

Supported 3G bands

Supported LTE bands

GNSS

LE910-EUG

GSM 900, DCS1800

B5(850), B8 (900), B1 (2100)

B20 (800), B3 (1800), B7

(2600)

YES

LE910-NAG

GSM 850, PCS 1900

B5(850), B2(1900)

B17(700), B5(850),

B4(1700), B2(1900)

YES

LE910-NVG

Not supported

B5(850), B2(1900)

B13(700), B4(1700)

YES

LE910-SVG

Not supported

B13(700), B4(1700)

YES

LE910-SKG

Not supported

B3 (1800), B5(850)

YES

Band

Power Class

GSM 850 / 900

4 (2W)

DCS1800 / PCS 1900

1 (1W)

EDGE, 850/900 MHz

E2 (0.5W)

EDGE, 1800/1900 MHz

Class E2 (0.4W)

WCDMA FDD B1, B2, B4, B5, B8

Class 3 (0.25W)

LTE FDD B2, B3, B4, B5, B7, B13, B17, B20

Class 3 (0.2 W)

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The antenna connection and board layout design are the most important aspect in the full

product design as they strongly affect the product overall performances, hence read carefully

and follow the requirements and the guidelines for a proper design.

The antenna and antenna transmission line on PCB for a Telit LE910 device shall fulfil the

following requirements:

ANTENNA REQUIREMENTS for LE910-EUG

Frequency range

Depending by frequency band(s) provided by the network operator, the

customer shall use the most suitable antenna for that/those band(s)

Bandwidth (GSM/EDGE)

GSM900 : 80 MHz

GSM1800(DCS) : 170 MHz

Bandwidth

(WCDMA)

WCDMA band I(2100) : 250 MHz

WCDMA band V(850) : 70 MHz

WCDMA band VIII(900) : 80 MHz

Bandwidth

(LTE)

LTE band III(1800) : 170 MHz

LTE Band VII(2600) : 190 MHz

LTE Band XX(800) : 71 MHz

Impedance

50 ohm

Input power

> 33dBm(2 W) peak power in GSM

> 24dBm Average power in WCDMA & LTE

VSWR absolute max

≤ 10:1 (limit to avoid permanent damage)

VSWR recommended

≤ 2:1 (limit to fulfil all regulatory requirements)

ANTENNA REQUIREMENTS for LE910-NAG

Frequency range

Depending by frequency band(s) provided by the network operator, the

customer shall use the most suitable antenna for that/those band(s)

Bandwidth (GSM/EDGE)

GSM850 : 70 MHz

GSM1900(PCS) : 140 MHz

Bandwidth

(WCDMA)

WCDMA band II(1900) : 140 MHz

WCDMA band V(850) : 70 MHz

Bandwidth

(LTE)

LTE Band II(1900) : 140 MHz

LTE Band IV(1700) : 445 MHz

LTE Band V (850) : 70 MHz

LTE Band XVII(700) : 42 MHz

Impedance

50 ohm

Input power

> 33dBm(2 W) peak power in GSM

> 24dBm Average power in WCDMA & LTE

VSWR absolute max

≤ 10:1 (limit to avoid permanent damage)

VSWR recommended

≤ 2:1 (limit to fulfil all regulatory requirements)

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

ANTENNA REQUIREMENTS for LE910-NVG

Frequency range

Depending by frequency band(s) provided by the network operator, the

customer shall use the most suitable antenna for that/those band(s)

Bandwidth

(WCDMA)

WCDMA band II(1900) : 140 MHz

WCDMA band V(850) : 70 MHz

Bandwidth

(LTE)

LTE Band IV(1700) : 445 MHz

LTE Band XIII(700) : 41 MHz

Impedance

50 ohm

Input power

> 24dBm Average power in WCDMA & LTE

VSWR absolute max

≤ 10:1 (limit to avoid permanent damage)

VSWR recommended

≤ 2:1 (limit to fulfil all regulatory requirements)

ANTENNA REQUIREMENTS for LE910-SVG

Frequency range

Depending by frequency band(s) provided by the network operator, the

customer shall use the most suitable antenna for that/those band(s)

Bandwidth

(LTE)

LTE Band IV(1700) : 445 MHz

LTE Band XIII(700) : 41 MHz

Impedance

50 ohm

Input power

> 24dBm Average power

VSWR absolute max

≤ 10:1 (limit to avoid permanent damage)

VSWR recommended

≤ 2:1 (limit to fulfil all regulatory requirements)

ANTENNA REQUIREMENTS for LE910-SKG

Frequency range

Depending by frequency band(s) provided by the network operator, the

customer shall use the most suitable antenna for that/those band(s)

Bandwidth

(LTE)

LTE band III(1800) : 170 MHz

LTE Band V (850) : 70 MHz

Impedance

50 ohm

Input power

> 24dBm Average power

VSWR absolute max

≤ 10:1 (limit to avoid permanent damage)

VSWR recommended

≤ 2:1 (limit to fulfil all regulatory requirements)

When using the LE910, since there's no antenna connector on the module, the antenna must

be connected to the LE910 antenna pad (K1) by means of a transmission line implemented on

the PCB.

In the case the antenna is not directly connected at the antenna pad of the LE910, then a PCB

line is needed in order to connect with it or with its connector.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

This transmission line shall fulfil the following requirements:

ANTENNA LINE ON PCB REQUIREMENTS

Characteristic Impedance

50 ohm

Max Attenuation

0,3 dB

Coupling with other signals shall be avoided

Cold End (Ground Plane) of antenna shall be equipotential to

the LE910 ground pins

Furthermore if the device is developed for the US market and/or Canada market, it shall

comply with the FCC and/or IC approval requirements:

This device is to be used only for mobile and fixed application. In order to re-use the Telit

FCC/IC approvals the antenna(s) used for this transmitter must be installed to provide a

separation distance of at least 20 cm from all persons and must not be co-located or operating

in conjunction with any other antenna or transmitter. If antenna is installed with a separation

distance of less than 20 cm from all persons or is co-located or operating in conjunction with

any other antenna or transmitter then additional FCC/IC testing may be required. End-Users

must be provided with transmitter operation conditions for satisfying RF exposure

compliance.

Antennas used for this OEM module must not exceed the gains for mobile and fixed

operating configurations as described in “FCC/IC Regulatory notices” chapter.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

 Make sure that the transmission line’s characteristic impedance is 50ohm ;

 Keep line on the PCB as short as possible, since the antenna line loss shall be less than

around 0,3 dB;

 Line geometry should have uniform characteristics, constant cross section, avoid meanders

and abrupt curves;

 Any kind of suitable geometry / structure (Microstrip, Stripline, Coplanar, Grounded

Coplanar Waveguide...) can be used for implementing the printed transmission line afferent

the antenna;

 If a Ground plane is required in line geometry, that plane has to be continuous and

sufficiently extended, so the geometry can be as similar as possible to the related canonical

model;

 Keep, if possible, at least one layer of the PCB used only for the Ground plane; If possible,

use this layer as reference Ground plane for the transmission line;

 It is wise to surround (on both sides) the PCB transmission line with Ground, avoid having

other signal tracks facing directly the antenna line track.

 Avoid crossing any un-shielded transmission line footprint with other signal tracks on

different layers;

 The ground surrounding the antenna line on PCB has to be strictly connected to the main

Ground Plane by means of via holes (once per 2mm at least), placed close to the ground

edges facing line track;

 Place EM noisy devices as far as possible from LE910 antenna line;

 Keep the antenna line far away from the LE910 power supply lines;

 If EM noisy devices are present on the PCB hosting the LE910, such as fast switching ICs,

take care of the shielding of the antenna line by burying it inside the layers of PCB and

surround it with Ground planes, or shield it with a metal frame cover.

 If EM noisy devices are not present around the line, the use of geometries like Microstrip or

Grounded Coplanar Waveguide has to be preferred, since they typically ensure less

attenuation if compared to a Stripline having same length;

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

 Install the antenna in a place covered by the GSM signal.

 If the device antenna is located greater then 20cm from the human body and there are no co-

located transmitter then the Telit FCC/IC approvals can be re-used by the end product

 If the device antenna is located less than 20cm from the human body or there are no co-

located transmitter then the additional FCC/IC testing may be required for the end product

(Telit FCC/IC approvals cannot be reused)

 Antenna shall not be installed inside metal cases

 Antenna shall be installed also according Antenna manufacturer instructions.

This product is including an input for a second RX antenna to improve the radio sensitivity.

The function is called Antenna Diversity.

DIVERSITY ANTENNA REQUIREMENTS for LE910-EUG

Frequency range

Depending by frequency band(s) provided by the network operator, the

customer shall use the most suitable antenna for that/those band(s)

Bandwidth

(WCDMA)

WCDMA band I(2100) : 250 MHz

WCDMA band V(850) : 70 MHz

WCDMA band VIII(900) : 80 MHz

Bandwidth

(LTE)

LTE band III(1800) : 170 MHz

LTE Band VII(2600) : 190 MHz

LTE Band XX(800) : 71 MHz

Impedance

50 ohm

VSWR recommended

≤ 2:1 (limit to fulfil all regulatory requirements)

DIVERSITY ANTENNA REQUIREMENTS for LE910-NAG

Frequency range

Depending by frequency band(s) provided by the network operator, the

customer shall use the most suitable antenna for that/those band(s)

Bandwidth

(WCDMA)

WCDMA band II(1900) : 140 MHz

WCDMA band V(850) : 70 MHz

Bandwidth

(LTE)

LTE Band II(1900) : 140 MHz

LTE Band IV(1700) : 445 MHz

LTE Band V (850) : 70 MHz

LTE Band XVII(700) : 42 MHz

Impedance

50 ohm

VSWR recommended

≤ 2:1 (limit to fulfil all regulatory requirements)

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

DIVERSITY ANTENNA REQUIREMENTS for LE910-NVG

Frequency range

Depending by frequency band(s) provided by the network operator, the

customer shall use the most suitable antenna for that/those band(s)

Bandwidth

(WCDMA)

WCDMA band II(1900) : 140 MHz

WCDMA band V(850) : 70 MHz

Bandwidth

(LTE)

LTE Band IV(1700) : 445 MHz

LTE Band XIII(700) : 41 MHz

Impedance

50 ohm

VSWR recommended

≤ 2:1 (limit to fulfil all regulatory requirements)

DIVERSITY ANTENNA REQUIREMENTS for LE910-SVG

Frequency range

Depending by frequency band(s) provided by the network operator, the

customer shall use the most suitable antenna for that/those band(s)

Bandwidth

(LTE)

LTE Band IV(1700) : 445 MHz

LTE Band XIII(700) : 41 MHz

Impedance

50 ohm

VSWR recommended

≤ 2:1 (limit to fulfil all regulatory requirements)

DIVERSITY ANTENNA REQUIREMENTS for LE910-SKG

Frequency range

Depending by frequency band(s) provided by the network operator, the

customer shall use the most suitable antenna for that/those band(s)

Bandwidth

(LTE)

LTE band III(1800) : 170 MHz

LTE Band V (850) : 70 MHz

Impedance

50 ohm

VSWR recommended

≤ 2:1 (limit to fulfil all regulatory requirements)

When using the LE910, since there's no antenna connector on the module, the antenna must be

connected to the LE910 antenna pad (F1) by means of a transmission line implemented on the

PCB.

In the case the antenna is not directly connected at the antenna pad of the LE910, then a PCB

line is needed in order to connect with it or with its connector.

The second Rx antenna should not be located in the close vicinity of main antenna. In order to

improve Diversity Gain, Isolation and reduce mutual interaction, the two antennas should be

located at the maximum reciprocal distance possible, taking into consideration the available

space into the application.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The LE910 module is integrating a GNSS receiver that could be used in Autonomous or in A-GPS

(assisted GPS) mode.

The module includes already an LNA (13.5dB gain typ.) so it could be used with a passive antenna.

The Pads related to this function are the following:

PAD

Signal

I/O

Function

Type

ANT_GNSS

GNSS Antenna (50 ohm)

GNSS_LNA_EN

Output enable for External LNA supply

CMOS 1.8V

It is recommended to use antennas as follow:

• An external passive antenna (GPS only)

• An external passive antenna, GNS pre-Filter

The external pre-Filter shall be required for GLONASS application.

The Glonass pre-Filter requirement shall fulfil the following requirements:

 Source and Load Impedance = 50Ohm

 Insertion Loss (1575.42 – 1576.42MHz) = 1.4dB (Max)

 Insertion Loss (1565.42 – 1585.42MHz) = 1.4dB (Max)

 Insertion Loss (1597.5515 – 1605.886MHZ) = 2.0dB (Max)

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

 Ensure that the antenna line impedance is 50ohm.

 Keep the antenna line on the PCB as short as possible to reduce the loss.

 Antenna line must have uniform characteristics, constant cross section, avoid meanders and

abrupt curves.

 Keep one layer of the PCB used only for the Ground plane, if possible.

 Surround (on the sides, over and under) the antenna line on PCB with Ground, avoid having

other signal tracks facing directly the antenna line of track.

 The ground around the antenna line on PCB has to be strictly connected to the Ground Plane

by placing vias once per 2mm at least.

 Place EM noisy devices as far as possible from LE910 antenna line.

 Keep the antenna line far away from the LE910 power supply lines.

 Keep the antenna line far away from the LE910 GSM RF lines.

 If you have EM noisy devices around the PCB hosting the LE910, such as fast switching ICs,

take care of the shielding of the antenna line by burying it inside the layers of PCB and

surround it with Ground planes, or shield it with a metal frame cover.

 If you do not have EM noisy devices around the PCB of LE910, use a strip-line on the

superficial copper layer for the antenna line. The line attenuation will be lower than a buried

one.

RF Trace losses are difficult to estimate on a PCB without having the appropriate tables or RF

simulation software to estimate what the losses would be. A good rule of thumb would be to keep the

RF traces as short as possible, make sure they are 50 ohms impedance and don’t contain any sharp

bends.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

 The LE910 due to its characteristics of sensitivity is capable to perform a Fix inside the

buildings. (In any case the sensitivity could be affected by the building characteristics i.e.

shielding).

 The Antenna must not be co-located or operating in conjunction with any other antenna or

transmitter.

 Antenna must not be installed inside metal cases.

 Antenna must be installed also according to the Antenna manufacturer instructions.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The following table shows the logic level specifications used in the LE910 interface circuits:

Absolute Maximum Ratings -Not Functional

Parameter

Min

Max

Input level on any digital pin (CMOS 1.8) with respect

to ground

-0.3V

2.16V

Operating Range - Interface levels (1.8V CMOS)

Level

Min

Max

Input high level

1.5V

2.1V

Input low level

0.5V

Output high level

1.35V

1.8

Output low level

0.45V

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Signal

Function

I/O

PAD

HW_SHUTDOWN*

Unconditional Shutdown of the Module

R13

HW_SHUTDOWN* is used to unconditionally shutdown the LE910. Whenever this signal is

pulled low, the LE910 is reset. When the device is reset it stops any operation. After the release

of the line, the LE910 is unconditionally shut down, without doing any detach operation from

the network where it is registered. This behaviour is not a proper shut down because any GSM

device is requested to issue a detach request on turn off. For this reason the HW_SHUTDOWN*

signal must not be used to normally shutting down the device, but only as an emergency exit in

the rare case the device remains stuck waiting for some network response.

The HW_SHUTDOWN* is internally controlled on start-up to achieve always a proper power-

on reset sequence, so there's no need to control this pin on start-up.

It may only be used to reset a device already on that is not responding to any command.

NOTE:

Do not use this signal to power off the LE910. Use the ON/OFF signal to perform this function

or the AT#SHDN command.

Unconditional Shutdown Signal Operating levels:

Signal

Min

Max

HW_SHUTDOWN*

Input high

1.5V

2.1V

HW_SHUTDOWN*

Input low

0.5V

* this signal is internally pulled up so the pin can be left floating if not used.

If unused, this signal may be left unconnected. If used, then it must always be connected with

an open collector transistor, to permit to the internal circuitry the power on reset and under

voltage lockout functions.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The LE910 module includes a Universal Serial Bus (USB) transceiver, which operates at

USB full-speed (12Mbits/sec) and USB high-speed (480Mbits/sec).

It is compliant with the USB 2.0 specification and can be used for diagnostic monitoring,

control and data transfers.

The following table is listing the available signals:

PAD

Signal

I/O

Function

Type

NOTE

B15

USB_D+

I/O

USB differential Data (+)

3.3V

C15

USB_D-

I/O

USB differential Data (-)

3.3V

A13

VUSB

Power sense for the internal USB

transceiver.

The USB_DPLUS and USB_DMINUS signals have a clock rate of 480 MHz.

The signal traces should be routed carefully. Trace lengths, number of vias and capacitive

loading should be minimized. The characteristic impedance value should be as close as

possible to 90 Ohms differential.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The LE910 module is provided with by 2 Asynchronous serial ports:

 MODEM SERIAL PORT 1 (Main)

 MODEM SERIAL PORT 2 (Auxiliary)

Several configurations can be designed for the serial port on the OEM hardware, but the most

common are:

 RS232 PC com port

 microcontroller UART @ 1.8V (Universal Asynchronous Receive Transmit)

 microcontroller UART @ 5V or other voltages different from 1.8V

Depending from the type of serial port on the OEM hardware a level translator circuit may be

needed to make the system work.

On the LE910 the ports are CMOS 1.8.

The electrical characteristics of the Serial ports are explained in the following tables:

Absolute Maximum Ratings -Not Functional

Parameter

Min

Max

Input level on any digital pin (CMOS 1.8) with

respect to ground

-0.3V

2.16V

Operating Range - Interface levels (1.8V CMOS)

Level

Min

Max

Input high level

1.5V

2.1V

Input low level

0.5V

Output high level

1.35V

1.8

Output low level

0.45V

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The serial port 1 on the LE910 is a +1.8V UART with all the 7 RS232 signals.

It differs from the PC-RS232 in the signal polarity (RS232 is reversed) and levels.

RS232

Pin #

Signal

LE910

Pad Number

Name

Usage

C109/DCD

N14

Data Carrier Detect

Output from the LE910 that indicates the carrier presence

C104/RXD

M15

Transmit line *see

Note

Output transmit line of LE910 UART

C103/TXD

N15

Receive line *see

Note

Input receive of the LE910 UART

C108/DTR

M14

Data Terminal Ready

Input to the LE910 that controls the DTE READY condition

GND

M12, B13, P13,

E14 …

Ground

C107/DSR

P14

Data Set Ready

Output from the LE910 that indicates the module is ready

C106/CTS

P15

Clear to Send

Output from the LE910 that controls the Hardware flow

control

C105/RTS

L14

Request to Send

Input to the LE910 that controls the Hardware flow control

C125/RING

R14

Ring Indicator

Output from the LE910 that indicates the incoming call

condition

NOTE:

According to V.24, some signal names are referred to the application side, therefore on the

LE910 side these signal are on the opposite direction:

TXD on the application side will be connected to the receive line (here named C103/TXD)

RXD on the application side will be connected to the transmit line (here named C104/RXD)

NOTE:

For a minimum implementation, only the TXD, RXD lines can be connected, the other lines can

be left open provided a software flow control is implemented.

NOTE:

In order to avoid a back powering effect it is recommended to avoid having any HIGH logic

level signal applied to the digital pins of the LE910 when the module is powered off or during

an ON/OFF transition.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The secondary serial port on the LE910 is composed by only the RX and TX lines.

The signals of the LE910 serial port are:

PAD

Signal

I/O

Function

Type

COMMENT

D15

TX_AUX

Auxiliary UART (TX Data to DTE)

1.8V

E15

RX_AUX

Auxiliary UART (RX Data from DTE)

1.8V

NOTE:

In order to avoid a back powering effect it is recommended to avoid having any HIGH logic

level signal applied to the digital pins of the LE910 when the module is powered off or during

an ON/OFF transition.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

In order to interface the LE910 with a PC com port or a RS232 (EIA/TIA-232) application a

level translator is required. This level translator must:

 invert the electrical signal in both directions;

 Change the level from 0/1.8V to +15/-15V.

Actually, the RS232 UART 16450, 16550, 16650 & 16750 chipsets accept signals with lower

levels on the RS232 side (EIA/TIA-562), allowing a lower voltage-multiplying ratio on the level

translator. Note that the negative signal voltage must be less than 0V and hence some sort of

level translation is always required.

The simplest way to translate the levels and invert the signal is by using a single chip level

translator. There are a multitude of them, differing in the number of drivers and receivers and in

the levels (be sure to get a true RS232 level translator not a RS485 or other standards).

By convention the driver is the level translator from the 0-1.8V UART to the RS232 level. The

receiver is the translator from the RS232 level to 0-1.8V UART.

In order to translate the whole set of control lines of the UART you will need:

 5 drivers

 3 receivers

NOTE:

The digital input lines working at 1.8V have an absolute maximum input voltage of 2.7V;

therefore the level translator IC shall not be powered by the VBATT supply of the module to

avoid damaging the LE910 digital signals.

Instead it has to be supplied by a dedicated 1.8V power supply.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

An example of RS232 level adaptation circuitry could be done using a MAXIM transceiver

(MAX218)

In this case the chipset is capable to translate directly from 1.8V to the RS232 levels (Example

done on 4 signals only).

NOTE:

In this case the length of the lines on the application has to be carefully checked to avoid

problems in case of High Speed data rates on RS232.

The RS232 serial port lines are usually connected to a DB9 connector with the following layout:

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The Audio of the LE910 Module is carried by DVI digital audio interface.

The audio port can be directly connected to end device using digital interface, or via one of the

several compliant codecs (in case an analog audio is needed).

The product is providing the Digital Audio Interface (DVI) on the following Pins:

Digital Voice Interface (DVI)

PAD

Signal

I/O

Function

Note

Type

DVI_WA0

I/O

Digital Audio Interface (WA0)

B-PD 1.8V

DVI_RX

Digital Audio Interface (RX)

B-PD 1.8V

DVI_TX

Digital Audio Interface (TX)

B-PD 1.8V

DVI_CLK

I/O

Digital Audio Interface (BCLK)

B-PD 1.8V

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The LE910 module is provided by a set of Digital Input / Output pins

Input pads can only be read; they report the digital value (high or low) present on the pad at the

read time.

Output pads can only be written or queried and set the value of the pad output.

An alternate function pad is internally controlled by the LE910 firmware and acts depending on

the function implemented.

The following table shows the available GPIO on the LE910:

PAD

Signal

I/O

Function

Type

Drive

strength

Note

GPIO_01

I/O

Configurable GPIO

BH-PD (*)

1.8V

1 mA

GPIO_02

I/O

Configurable GPIO

BH-PD (*)

1.8V

1 mA

C10

GPIO_03

I/O

Configurable GPIO

BH-PD (*)

1.8V

1 mA

C11

GPIO_04

I/O

Configurable GPIO

BH-PD (*)

1.8V

1 mA

B14

GPIO_05

I/O

Configurable GPIO

BH-PD (*)

1.8V

1 mA

C12

GPIO_06

I/O

Configurable GPIO

BH-PD (*)

1.8V

1 mA

C13

GPIO_07

I/O

Configurable GPIO

BH-PD (*)

1.8V

1 mA

K15

GPIO_08

I/O

Configurable GPIO

BH-PD (*)

1.8V

1 mA

L15

GPIO_09

I/O

Configurable GPIO

BH-PD (*)

1.8V

1 mA

G15

GPIO_10

I/O

Configurable GPIO

BH-PD (*)

1.8V

1 mA

(*) BH-PD - Bidirectional digital with CMOS input; High-voltage tolerant; Contains an internal

pull-down device.

NOTE:

In order to avoid a back powering effect it is recommended to avoid having any HIGH logic

level signal applied to the digital pins of the LE910 when the module is powered off or during

an ON/OFF transition.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Where not specifically stated, all the interface circuits work at 1.8V CMOS logic levels.

The following table shows the logic level specifications used in the LE910 interface circuits:

Absolute Maximum Ratings -Not Functional

Parameter

Min

Max

Input level on any digital pin (CMOS 1.8) with

respect to ground

-0.3V

2.16V

Operating Range - Interface levels (1.8V CMOS)

Level

Min

Max

Input high level

1.5V

2.1V

Input low level

0.5V

Output high level

1.35V

1.8

Output low level

0.45V

The GPIO pads, when used as inputs, can be connected to a digital output of another device and

report its status, provided this device has interface levels compatible with the 1.8V CMOS levels

of the GPIO. If the digital output of the device to be connected with the GPIO input pad has

interface levels different from the 1.8V CMOS, then it can be buffered with an open collector

transistor with a 10K pull up to 1.8V.

NOTE:

In order to avoid a back powering effect it is recommended to avoid having any HIGH logic

level signal applied to the digital pins of the LE910 when the module is powered off or during

an ON/OFF transition.

The GPIO pads, when used as outputs, can drive 1.8V CMOS digital devices or compatible

hardware. When set as outputs, the pads have a push-pull output and therefore the pull-up

resistor may be omitted.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The STAT_LED pin status shows information on the network service availability and Call

status. The function is available as alternate function of GPIO_01 (to be enabled using the

AT#GPIO=1,0,2 command).

In the LE910 modules, the STAT_LED needs an external transistor to drive an external LED.

Therefore, the status indicated in the following table is reversed with respect to the pin status.

Device Status

LED status

Device off

Permanently off

Net search / Not registered / turning

off

Fast blinking

(Period 1s, Ton 0,5s)

Registered full service

Slow blinking

(Period 3s, Ton 0,3s)

Voice Call Active

Permanently on

A schematic example could be:

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The VRTC pin brings out the Real Time Clock supply, which is separate from the rest of the

digital part, allowing having only RTC going on when all the other parts of the device are off.

To this power output a backup capacitor can be added in order to increase the RTC autonomy

during power off of the battery.

NO Devices must be powered from this pin.

A regulated power supply output is provided in order to supply small devices from the module.

The signal is present on Pad R11 and it is in common with the PWRMON (module powered ON

indication) function.

This output is always active when the module is powered ON.

The operating range characteristics of the supply are:

Level

Min

Typical

Max

Output voltage

1.75V

1.80V

1.85V

Output current

100mA

Output bypass capacitor

(inside the module)

1uF

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The LE910 is provided by one AD converter.

It is able to read a voltage level in the range of 0÷1.7 volts applied on the ADC pin input, store

and convert it into 8 bit word.

The following table is showing the ADC characteristics:

Min

Max

Units

Input Voltage range

1.7

Volt

AD conversion

bits

Resolution

< 6,6

The input line is named as ADC_IN1 and it is available on Pad B1

An AT command is available to use the ADC function.

The command is AT#ADC=1,2

The read value is expressed in mV

Refer to SW User Guide or AT Commands Reference Guide for the full description of this

function.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The LE910 modules have been designed in order to be compliant with a standard lead-free

SMT process.

Pin B1

Dimensions in mm

Bottom view

Lead-free Alloy:

Surface finishing Ni/Au for all solder pads

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

TOP VIEW

In order to easily rework the LE910 is suggested to consider on the application a 1.5 mm

placement inhibit area around the module.

It is also suggested, as common rule for an SMT component, to avoid having a mechanical

part of the application in direct contact with the module.

NOTE:

In the customer application, the region under WIRING INHIBIT (see figure above) must

be clear from signal or ground paths.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Stencil’s apertures layout can be the same of the recommended footprint (1:1), we

suggest a thickness of stencil foil ≥ 120 µm.

Non solder mask defined (NSMD) type is recommended for the solder pads on the

PCB.

PCB

Copper Pad

Solder Mask

SMD

(Solder Mask Defined)

NSMD

(Non Solder Mask Defined)

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The recommendation for the PCB pads dimensions are described in the following image

(dimensions in mm)

Solder resist openings

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

It is not recommended to place via or micro-via not covered by solder resist in an

area of 0,3 mm around the pads unless it carries the same signal of the pad itself

(see following figure).

Holes in pad are allowed only for blind holes and not for through holes.

Recommendations for PCB pad surfaces:

Finish

Layer thickness [µm]

Properties

Electro-less Ni / Immersion

3 –7 / 0.05 – 0.15

good solder ability protection,

high shear force values

The PCB must be able to resist the higher temperatures which are occurring at the

lead-free process. This issue should be discussed with the PCB-supplier. Generally,

the wettability of tin-lead solder paste on the described surface plating is better

compared to lead-free solder paste.

It is not necessary to panel the application’s PCB, however in that case it is

suggested to use milled contours and predrilled board breakouts; scoring or v-cut

solutions are not recommended.

Inhibit area for micro-via

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Lead free

Solder paste

Sn/Ag/Cu

We recommend using only “no clean” solder paste in order to avoid the cleaning of the modules

after assembly.

Recommended solder reflow profile:

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Profile Feature

Pb-Free Assembly

Average ramp-up rate (TL to TP)

3°C/second max

Preheat

– Temperature Min (Tsmin)

– Temperature Max (Tsmax)

– Time (min to max) (ts)

150°C

200°C

60-180 seconds

Tsmax to TL

– Ramp-up Rate

3°C/second max

Time maintained above:

– Temperature (TL)

– Time (tL)

217°C

60-150 seconds

Peak Temperature (Tp)

245 +0/-5°C

Time within 5°C of actual Peak

Temperature (tp)

10-30 seconds

Ramp-down Rate

6°C/second max.

Time 25°C to Peak Temperature

8 minutes max.

NOTE:

All temperatures refer to topside of the package, measured on the package body surface

WARNING:

The LE910 module withstands one reflow process only.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The LE910 modules are packaged on trays of 20 pieces each. These trays can be used in

SMT processes for pick & place handling.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The LE910 can be packaged on reels of 200 pieces each.

See figure for module positioning into the carrier.

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The LE910 is a Moisture Sensitive Device level 3, in according with standard IPC/JEDEC J-

STD-020, take care all the relatives requirements for using this kind of components.

Moreover, the customer has to take care of the following conditions:

a) Calculated shelf life in sealed bag: 12 months at <40°C and <90% relative humidity (RH).

b) Environmental condition during the production: 30°C / 60% RH according to IPC/JEDEC

J-STD-033A paragraph 5.

c) The maximum time between the opening of the sealed bag and the reflow process must be

168 hours if condition b) “IPC/JEDEC J-STD-033A paragraph 5.2” is respected

d) Baking is required if conditions b) or c) are not respected

e) Baking is required if the humidity indicator inside the bag indicates 10% RH

or more

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

READ CAREFULLY

Be sure the use of this product is allowed in the country and in the environment required. The use of this

product may be dangerous and has to be avoided in the following areas:

 Where it can interfere with other electronic devices in environments such as hospitals, airports,

aircrafts, etc

 Where there is risk of explosion such as gasoline stations, oil refineries, etc

It is responsibility of the user to enforce the country regulation and the specific environment regulation.

Do not disassemble the product; any mark of tampering will compromise the warranty validity.

We recommend following the instructions of the hardware user guides for a correct wiring of the product.

The product has to be supplied with a stabilized voltage source and the wiring has to be conforming to the

security and fire prevention regulations.

The product has to be handled with care, avoiding any contact with the pins because electrostatic

discharges may damage the product itself. Same cautions have to be taken for the SIM, checking carefully

the instruction for its use. Do not insert or remove the SIM when the product is in power saving mode.

The system integrator is responsible of the functioning of the final product; therefore, care has to be taken

to the external components of the module, as well as of any project or installation issue, because the risk

of disturbing the GSM network or external devices or having impact on the security. Should there be any

doubt, please refer to the technical documentation and the regulations in force.

Every module has to be equipped with a proper antenna with specific characteristics. The antenna has to

be installed with care in order to avoid any interference with other electronic devices and has to guarantee

a minimum distance from the body (20 cm). In case of this requirement cannot be satisfied, the system

integrator has to assess the final product against the SAR regulation.

The European Community provides some Directives for the electronic equipments introduced on the

market. All the relevant information’s are available on the European Community website:

http://europa.eu.int/comm/enterprise/rtte/dir99-5.htm

The text of the Directive 99/05 regarding telecommunication equipments is available, while the applicable

Directives (Low Voltage and EMC) are available at:

http://europa.eu.int/comm/enterprise/electr_equipment/index_en.htm

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The LE910-EUG module has been evaluated against the essential requirements of the 1999/5/EC

Directive.

Bulgarian

С настоящето Telit Communications S.p.A. декларира, че 2G/3G/LTE module

отговаря на съществените изисквания и другите приложими изисквания на

Директива 1999/5/ЕС.

Czech

Telit Communications S.p.A. tímto prohlašuje, že tento 2G/3G/LTE module je ve shodě

se základními požadavky a dalšími příslušnými ustanoveními směrnice 1999/5/ES.

Danish

Undertegnede Telit Communications S.p.A. erklærer herved, at følgende udstyr

2G/3G/LTE module overholder de væsentlige krav og øvrige relevante krav i direktiv

1999/5/EF.

Dutch

Hierbij verklaart Telit Communications S.p.A. dat het toestel 2G/3G/LTE module in

overeenstemming is met de essentiële eisen en de andere relevante bepalingen van

richtlijn 1999/5/EG.

English

Hereby, Telit Communications S.p.A., declares that this 2G/3G/LTE module is in

compliance with the essential requirements and other relevant provisions of Directive

1999/5/EC.

Estonian

Käesolevaga kinnitab Telit Communications S.p.A. seadme 2G/3G/LTE module

vastavust direktiivi 1999/5/EÜ põhinõuetele ja nimetatud direktiivist tulenevatele teistele

asjakohastele sätetele.

German

Hiermit erklärt Telit Communications S.p.A., dass sich das Gerät 2G/3G/LTE module in

Übereinstimmung mit den grundlegenden Anforderungen und den übrigen einschlägigen

Bestimmungen der Richtlinie 1999/5/EG befindet.

Greek

ΜΕ ΤΗΝ ΠΑΡΟΥΣΑ Telit Communications S.p.A. ΔΗΛΩΝΕΙ ΟΤΙ 2G/3G/LTE module

ΣΥΜΜΟΡΦΩΝΕΤΑΙ ΠΡΟΣ ΤΙΣ ΟΥΣΙΩΔΕΙΣ ΑΠΑΙΤΗΣΕΙΣ ΚΑΙ ΤΙΣ ΛΟΙΠΕΣ ΣΧΕΤΙΚΕΣ

ΔΙΑΤΑΞΕΙΣ ΤΗΣ ΟΔΗΓΙΑΣ 1999/5/ΕΚ.

Hungarian

Alulírott, Telit Communications S.p.A. nyilatkozom, hogy a 2G/3G/LTE module megfelel

a vonatkozó alapvetõ követelményeknek és az 1999/5/EC irányelv egyéb elõírásainak.

Finnish

Telit Communications S.p.A. vakuuttaa täten että 2G/3G/LTE module tyyppinen laite on

direktiivin 1999/5/EY oleellisten vaatimusten ja sitä koskevien direktiivin muiden ehtojen

mukainen.

French

Par la présente Telit Communications S.p.A. déclare que l'appareil 2G/3G/LTE module

est conforme aux exigences essentielles et aux autres dispositions pertinentes de la

directive 1999/5/CE.

Icelandic

Hér með lýsir Telit Communications S.p.A. yfir því að 2G/3G/LTE module er í samræmi

við grunnkröfur og aðrar kröfur, sem gerðar eru í tilskipun 1999/5/EC

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Italian

Con la presente Telit Communications S.p.A. dichiara che questo 2G/3G/LTE module è

conforme ai requisiti essenziali ed alle altre disposizioni pertinenti stabilite dalla direttiva

1999/5/CE.

Latvian

Ar šo Telit Communications S.p.A. deklarē, ka 2G/3G/LTE module atbilst Direktīvas

1999/5/EK būtiskajām prasībām un citiem ar to saistītajiem noteikumiem.

Lithuanian

Šiuo Telit Communications S.p.A. deklaruoja, kad šis 2G/3G/LTE module atitinka

esminius reikalavimus ir kitas 1999/5/EB Direktyvos nuostatas.

Maltese

Hawnhekk, Telit Communications S.p.A., jiddikjara li dan 2G/3G/LTE module

jikkonforma mal-ħtiġijiet essenzjali u ma provvedimenti oħrajn relevanti li hemm fid-

Dirrettiva 1999/5/EC.

Norwegian

Telit Communications S.p.A. erklærer herved at utstyret 2G/3G/LTE module er i samsvar

med de grunnleggende krav og øvrige relevante krav i direktiv 1999/5/EF.

Polish

Niniejszym Telit Communications S.p.A. oświadcza, że 2G/3G/LTE module jest zgodny

z zasadniczymi wymogami oraz pozostałymi stosownymi postanowieniami Dyrektywy

1999/5/EC

Portuguese

Telit Communications S.p.A. declara que este 2G/3G/LTE module está conforme com

os requisitos essenciais e outras disposições da Directiva 1999/5/CE.

Slovak

Telit Communications S.p.A. týmto vyhlasuje, že 2G/3G/LTE module spĺňa základné

požiadavky a všetky príslušné ustanovenia Smernice 1999/5/ES.

Slovenian

Telit Communications S.p.A. izjavlja, da je ta 2G/3G/LTE module v skladu z bistvenimi

zahtevami in ostalimi relevantnimi določili direktive 1999/5/ES.

Spanish

Por medio de la presente Telit Communications S.p.A. declara que el 2G/3G/LTE

module cumple con los requisitos esenciales y cualesquiera otras disposiciones

aplicables o exigibles de la Directiva 1999/5/CE.

Swedish

Härmed intygar Telit Communications S.p.A. att denna 2G/3G/LTE module står I

överensstämmelse med de väsentliga egenskapskrav och övriga relevanta

bestämmelser som framgår av direktiv 1999/5/EG.

In order to satisfy the essential requirements of 1999/5/EC Directive, the LE910-EUG module is

compliant with the following standards:

RF spectrum use (R&TTE art. 3.2)

EN 300 440-2 V1.4.1

EN 301 511 V9.0.2

EN 301 908-1 V6.2.1

EN 301 908-2 V5.4.1

EN 301 908-13 V5.2.1

EMC (R&TTE art. 3.1b)

EN 301 489-1 V1.9.2

EN 301 489-3 V1.6.1

EN 301 489-7 V1.3.1

EN 301 489-24 V1.5.1

Health & Safety (R&TTE art. 3.1a)

EN 60950-1:2006 + A11:2009 + A1:2010 + A12:2011 +

AC:2011

EN 62311:2008

EN 62479:2010

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

The conformity assessment procedure referred to in Article 10 and detailed in Annex IV of Directive

1999/5/EC has been followed with the involvement of the following Notified Body:

AT4 wireless, S.A.

Parque Tecnologico de Andalucía

C/ Severo Ochoa 2

29590 Campanillas – Málaga

SPAIN

Notified Body No: 1909

Thus, the following marking is included in the product:

The full declaration of conformity can be found on the following address:

http://www.telit.com/

There is no restriction for the commercialisation of the LE910-EUG modules in all the countries of the

European Union.

Final product integrating this module must be assessed against essential requirements of the 1999/5/EC

(R&TTE) Directive. It should be noted that assessment does not necessarily lead to testing. Telit

Communications S.p.A. recommends carrying out the following assessments:

RF spectrum use (R&TTE art. 3.2)

It will depend on the antenna used on the final product.

EMC (R&TTE art. 3.1b)

Testing

Health & Safety (R&TTE art. 3.1a)

Testing

Alternately, assessment of the final product against EMC (Art. 3.1b) and Electrical safety (Art. 3.1a)

essential requirements can be done against the essential requirements of the EMC and the LVD Directives:

 Low Voltage Directive 2006/95/EC and product safety

 Directive EMC 2004/108/EC for conformity for EMC

1909

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Modification statement

Telit has not approved any changes or modifications to this device by the user. Any changes or modifications

could void the user’s authority to operate the equipment.

Telit n’approuve aucune modification apportée à l’appareil par l’utilisateur, quelle qu’en soit la nature. Tout

changement ou modification peuvent annuler le droit d’utilisation de l’appareil par l’utilisateur.

Interference statement

This device complies with Part 15 of the FCC Rules and Industry Canada licence-exempt RSS standard(s).

Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this

device must accept any interference, including interference that may cause undesired operation of the device.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de

licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de

brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le

brouillage est susceptible d'en compromettre le fonctionnement.

Wireless notice

This equipment complies with FCC and IC radiation exposure limits set forth for an uncontrolled

environment. The antenna should be installed and operated with minimum distance of 20 cm between

the radiator and your body. Antenna gain must be below:

Frequency band

LE910-NAG

LE910-NVG

LE910-SVG

700 MHz

8.74 dBi

9.16 dBi

850 MHz

6.93 dBi

9.42 dBi

N/A

1700 MHz

5.00 dBi

1900 MHz

2.51 dBi

8.01 dBi

N/A

This transmitter must not be co-located or operating in conjunction with any other antenna or

transmitter.

9.16 dBi

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

Cet appareil est conforme aux limites d'exposition aux rayonnements de la IC pour un environnement non

contrôlé. L'antenne doit être installé de façon à garder une distance minimale de 20 centimètres entre la source

de rayonnements et votre corps. Gain de l'antenne doit être ci-dessous:

Bande de fréquence

LE910-NAG

LE910-NVG

LE910-SVG

700 MHz

8.74 dBi

850 MHz

6.93 dBi

9.42 dBi

N/A

1700 MHz

5.00 dBi

1900 MHz

2.51 dBi

8.01 dBi

N/A

L'émetteur ne doit pas être colocalisé ni fonctionner conjointement avec à autre antenne ou autre émetteur.

FCC Class B digital device notice

This equipment has been tested and found to comply with the limits for a Class B digital device,

pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection

against harmful interference in a residential installation. This equipment generates, uses and can radiate

radio frequency energy and, if not installed and used in accordance with the instructions, may cause

harmful interference to radio communications. However, there is no guarantee that interference will not

occur in a particular installation. If this equipment does cause harmful interference to radio or

television reception, which can be determined by turning the equipment off and on, the user is

encouraged to try to correct the interference by one or more of the following measures:

- Reorient or relocate the receiving antenna.

- Increase the separation between the equipment and receiver.

- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

- Consult the dealer or an experienced radio/TV technician for help.

Labelling Requirements for the Host device

The host device shall be properly labelled to identify the modules within the host device. The certification label

of the module shall be clearly visible at all times when installed in the host device, otherwise the host device

must be labelled to display the FCC ID and IC of the module, preceded by the words "Contains transmitter

module", or the word "Contains", or similar wording expressing the same meaning, as follows:

LE910-NAG

Contains FCC ID: RI7LE910NA

Contains IC: 5131A-LE910NA

LE910-NVG

Contains FCC ID: RI7LE910NV

Contains IC: 5131A-LE910NV

9.16 dBi 9.16 dBi

LE910 Hardware User Guide

1vv0301089 Rev.3 – 09-06-2014

LE910-SVG

Contains FCC ID: RI7LE910SV

Contains IC: 5131A-LE910SV

L'appareil hôte doit être étiqueté comme il faut pour permettre l'identification des modules qui s'y trouvent.

L'étiquette de certification du module donné doit être posée sur l'appareil hôte à un endroit bien en vue en tout

temps. En l'absence d'étiquette, l'appareil hôte doit porter une étiquette donnant le FCC ID et le IC du module,

précédé des mots « Contient un module d'émission », du mot « Contient » ou d'une formulation similaire

exprimant le même sens, comme suit :

LE910-NAG

Contains FCC ID: RI7LE910NA

Contains IC: 5131A-LE910NA

LE910-NVG

Contains FCC ID: RI7LE910NV

Contains IC: 5131A-LE910NV

LE910-SVG

Contains FCC ID: RI7LE910SV

Contains IC: 5131A-LE910SV

CAN ICES-3 (B) / NMB-3 (B)

This Class B digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de classe B est conforme à la norme canadienne ICES-003.

Telit Communications S p A LE910NA LTE/3G/2G Module User Manual HE910 Hardware User Guide

Telit Communications S.p.A. LTE/3G/2G Module HE910 Hardware User Guide

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