Quectel Wireless Solutions 201807BC95D NB-IoT Module User Manual
Quectel Wireless Solutions Company Limited NB-IoT Module Users Manual
Users Manual
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BC95-D Hardware Design Datasheet NB-IoT Module Series Rev. BC95-D_Hardware_Design_Datasheet_V1.3 Date: 2018-06-08 Status: Released www.quectel.com NB-IoT Module Series BC95-D Hardware Design Datasheet Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarters: Quectel Wireless Solutions Co., Ltd. 7th Floor, Hongye Building, No.1801 Hongmei Road, Xuhui District, Shanghai 200233, China Tel: +86 21 5108 6236 Email: info@quectel.com Or our local office. For more information, please visit: http://quectel.com/support/sales.htm For technical support, or to report documentation errors, please visit: http://quectel.com/support/technical.htm Or email to: support@quectel.com GENERAL NOTES QUECTEL OFFERS THE INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION PROVIDED IS BASED UPON CUSTOMERS’ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN, AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION. ALL INFORMATION SUPPLIED HEREIN IS SUBJECT TO CHANGE WITHOUT PRIOR NOTICE. COPYRIGHT THE INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF QUECTEL WIRELESS SOLUTIONS CO., LTD. TRANSMITTING, REPRODUCTION, DISSEMINATION AND EDITING OF THIS DOCUMENT AS WELL AS UTILIZATION OF THE CONTENT ARE FORBIDDEN WITHOUT PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF DAMAGES. ALL RIGHTS ARE RESERVED IN THE EVENT OF A PATENT GRANT OR REGISTRATION OF A UTILITY MODEL OR DESIGN. Copyright © Quectel Wireless Solutions Co., Ltd. 2018. All rights reserved. BC95-D_Hardware_Design_Datasheet 1 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet About the Document History Revision Date Author Description 1.0 2018-05-03 Ewent LU Initial 1.1 2018-05-25 Ewent LU 1. 2. 1.2 2018-06-05 Beny ZHU Updated the note about RF receiving sensitivity test condition in Chapter 4.4. 1.3 2018-06-08 Ewent LU Added “Quectel_BC95-D_Reference_Design” document as a reference datasheet in Table 29. BC95-D_Hardware_Design_Datasheet Added chip name in Chapter 2.3. Added reference chip datasheet in Table 29. 2 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Contents About the Document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 3 Table Index ................................................................................................................................................... 5 Figure Index ................................................................................................................................................. 6 Introduction .......................................................................................................................................... 7 1.1. Safety Information ................................................................................................................... 8 Product Concept .................................................................................................................................. 9 2.1. General Description ................................................................................................................. 9 2.2. Key Features ........................................................................................................................... 9 2.3. Functional Diagram ............................................................................................................... 11 2.4. Evaluation Board ................................................................................................................... 11 Application Functions ....................................................................................................................... 12 3.1. General Description ............................................................................................................... 12 3.2. Pin Assignment ...................................................................................................................... 13 3.3. Pin Description ...................................................................................................................... 14 3.4. Operating Modes ................................................................................................................... 18 3.5. Power Supply ........................................................................................................................ 19 3.5.1. Power Supply Pins ......................................................................................................... 19 3.5.2. Reference Design for Power Supply .............................................................................. 19 3.6. Turn on and off Scenarios ..................................................................................................... 20 3.6.1. Turn on ........................................................................................................................... 20 3.6.2. Turn off ........................................................................................................................... 21 3.6.3. Reset the Module ........................................................................................................... 21 3.7. Power Saving Mode (PSM) ................................................................................................... 22 3.8. UART Interfaces .................................................................................................................... 23 3.8.1. Main Port ........................................................................................................................ 25 3.8.2. Debug Port ..................................................................................................................... 26 3.8.3. UART Application ........................................................................................................... 26 3.9. USIM Interface....................................................................................................................... 27 3.10. ADC Interface ........................................................................................................................ 29 3.11. DAC Interface ........................................................................................................................ 30 3.12. SPI Interface .......................................................................................................................... 31 3.13. I2C Interface .......................................................................................................................... 31 3.14. Behaviors of RI ...................................................................................................................... 32 3.15. Network Status Indication ...................................................................................................... 33 Antenna Interface ............................................................................................................................... 34 4.1. RF Antenna Reference Design ............................................................................................. 34 4.2. Reference Design of RF Layout ............................................................................................ 35 4.3. RF Output Power ................................................................................................................... 37 BC95-D_Hardware_Design_Datasheet 3 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet 4.4. 4.5. 4.6. 4.7. RF Receiving Sensitivity........................................................................................................ 37 Operating Frequencies .......................................................................................................... 37 Antenna Requirement ........................................................................................................... 38 Recommended RF Connector for Antenna Installation ........................................................ 38 Electrical, Reliability and Radio Characteristics ............................................................................ 39 5.1. Absolute Maximum Ratings................................................................................................... 39 5.2. Operation and Storage Temperatures ................................................................................... 39 5.3. Current Consumption ............................................................................................................ 40 5.4. Electrostatic Discharge.......................................................................................................... 40 Mechanical Dimensions .................................................................................................................... 42 6.1. Mechanical Dimensions of the Module ................................................................................. 42 6.2. Recommended Footprint ....................................................................................................... 44 6.3. Design Effect Drawings of the Module .................................................................................. 45 Storage, Manufacturing and Packaging .......................................................................................... 46 7.1. Storage .................................................................................................................................. 46 7.2. Manufacturing and Soldering ................................................................................................ 47 7.3. Packaging .............................................................................................................................. 48 7.3.1. Tape and Reel Packaging .............................................................................................. 48 Appendix A References..................................................................................................................... 50 BC95-D_Hardware_Design_Datasheet 4 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Table Index TABLE 1: FREQUENCY OF BC95-D MODULE .......................................................................................... 9 TABLE 2: BC95-D KEY FEATURES .......................................................................................................... 10 TABLE 3: I/O PARAMETERS DEFINITION ............................................................................................... 14 TABLE 4: PIN DESCRIPTION ................................................................................................................... 14 TABLE 5: OVERVIEW OF OPERATING MODES ..................................................................................... 19 TABLE 6: VBAT AND GND PINS ............................................................................................................... 19 TABLE 7: RESET CHARACTERISTICS .................................................................................................... 21 TABLE 8: PIN DEFINITION OF THE UART INTERFACES ....................................................................... 24 TABLE 9: LOGIC LEVELS OF THE UART INTERFACES ........................................................................ 24 TABLE 10: UART AND LPUART SETTINGS............................................................................................. 25 TABLE 11: PIN DEFINITION OF THE USIM INTERFACE ........................................................................ 28 TABLE 12: PIN DEFINITION OF THE ADC ............................................................................................... 29 TABLE 13: CHARACTERISTICS OF THE ADC ........................................................................................ 29 TABLE 14: PIN DEFINITION OF THE DAC............................................................................................... 30 TABLE 15: CHARACTERISTICS OF THE DAC ........................................................................................ 30 TABLE 16: PIN DEFINITION OF THE SPI ................................................................................................ 31 TABLE 17: PIN DEFINITION OF THE I2C ................................................................................................. 31 TABLE 18: BEHAVIORS OF RI .................................................................................................................. 32 TABLE 19: WORKING STATE OF NETLIGHT .......................................................................................... 33 TABLE 20: PIN DEFINITION OF THE RF ANTENNA INTERFACE .......................................................... 34 TABLE 21: RF OUTPUT POWER (UPLINK QPSK AND BPSK MODULATION) ...................................... 37 TABLE 22: RF RECEIVING SENSITIVITY (THROUGHPUT ≥ 95%) ........................................................ 37 TABLE 23: OPERATING FREQUENCIES ................................................................................................. 37 TABLE 24: ANTENNA REQUIREMENT .................................................................................................... 38 TABLE 25: ABSOLUTE MAXIMUM RATINGS........................................................................................... 39 TABLE 26: OPERATION AND STORAGE TEMPERATURES .................................................................. 39 TABLE 27: CURRENT CONSUMPTION ................................................................................................... 40 TABLE 28: ELECTROSTATIC DISCHARGE CHARACTERISTICS.......................................................... 41 TABLE 29: RELATED DOCUMENTS ........................................................................................................ 50 TABLE 30: TERMS AND ABBREVIATIONS .............................................................................................. 50 BC95-D_Hardware_Design_Datasheet 5 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Figure Index FIGURE 1: FUNCTIONAL DIAGRAM .........................................................................................................11 FIGURE 2: PIN ASSIGNMENT .................................................................................................................. 13 FIGURE 3: REFERENCE CIRCUIT FOR POWER SUPPLY .................................................................... 20 FIGURE 4: TURN-ON TIMING .................................................................................................................. 20 FIGURE 5: TURN-OFF TIMING ................................................................................................................. 21 FIGURE 6: REFERENCE CIRCUIT OF RESET BY USING DRIVING CIRCUIT ..................................... 22 FIGURE 7: REFERENCE CIRCUIT OF RESET BY USING BUTTON ..................................................... 22 FIGURE 8: MODULE POWER CONSUMPTION IN DIFFERENT MODES .............................................. 23 FIGURE 9: REFERENCE DESIGN FOR MAIN PORT.............................................................................. 25 FIGURE 10: REFERENCE DESIGN FOR DEBUG PORT ........................................................................ 26 FIGURE 11: LEVEL MATCH DESIGN FOR 3.3V SYSTEM ...................................................................... 26 FIGURE 12: SKETCH MAP FOR RS-232 INTERFACE MATCH .............................................................. 27 FIGURE 13: REFERENCE CIRCUIT FOR USIM INTERFACE WITH 6-PIN USIM CARD CONNECTOR ............................................................................................................................................................ 28 FIGURE 14: BEHAVIORS OF RI WHEN A URC OR SMS MESSAGE IS RECEIVED............................. 32 FIGURE 15: REFERENCE DESIGN FOR NETLIGHT .............................................................................. 33 FIGURE 16: REFERENCE DESIGN FOR RF ANTENNA......................................................................... 34 FIGURE 17: MICROSTRIP LINE DESIGN ON A 2-LAYER PCB .............................................................. 35 FIGURE 18: COPLANAR WAVEGUIDE LINE DESIGN ON A 2-LAYER PCB .......................................... 35 FIGURE 19: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 3 AS REFERENCE GROUND) ........................................................................................................................................... 36 FIGURE 20: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 4 AS REFERENCE GROUND) ........................................................................................................................................... 36 FIGURE 21: MODULE TOP AND SIDE DIMENSIONS ............................................................................. 42 FIGURE 22: MODULE BOTTOM DIMENSIONS (BOTTOM VIEW) ......................................................... 43 FIGURE 23: RECOMMENDED FOOTPRINT (TOP VIEW) ...................................................................... 44 FIGURE 24: TOP VIEW OF THE MODULE .............................................................................................. 45 FIGURE 25: BOTTOM VIEW OF THE MODULE ...................................................................................... 45 FIGURE 26: REFLOW SOLDERING THERMAL PROFILE ...................................................................... 47 FIGURE 27: TAPE DIMENSIONS .............................................................................................................. 48 FIGURE 28: REEL DIMENSIONS ............................................................................................................. 49 BC95-D_Hardware_Design_Datasheet 6 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Introduction This document defines the BC95-D module and describes its air interface and hardware interface which are connected with customers’ applications. This document can help customers to quickly understand module interface specifications, electrical and mechanical details, as well as other related information of the module. Associated with application note and user guide, customers can use the BC95-D module to design and set up mobile applications easily. BC95-D_Hardware_Design_Datasheet 7 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet 1.1. Safety Information The following safety precautions must be observed during all phases of the operation, such as usage, service or repair of any cellular terminal or mobile incorporating BC95-D module. Manufacturers of the cellular terminal should send the following safety information to users and operating personnel, and incorporate these guidelines into all manuals supplied with the product. If not so, Quectel assumes no liability for the customers’ failure to comply with these precautions. Full attention must be given to driving at all times in order to reduce the risk of an accident. Using a mobile while driving (even with a handsfree kit) causes distraction and can lead to an accident. You must comply with laws and regulations restricting the use of wireless devices while driving. Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it is switched off. The operation of wireless appliances in an aircraft is forbidden, so as to prevent interference with communication systems. Consult the airline staff about the use of wireless devices on boarding the aircraft, if your device offers an Airplane Mode which must be enabled prior to boarding an aircraft. Switch off your wireless device when in hospitals, clinics or other health care facilities. These requests are designed to prevent possible interference with sensitive medical equipment. Cellular terminals or mobiles operating over radio frequency signal and cellular network cannot be guaranteed to connect in all conditions, for example no mobile fee or with an invalid (U)SIM card. While you are in this condition and need emergent help, please remember using emergency call. In order to make or receive a call, the cellular terminal or mobile must be switched on and in a service area with adequate cellular signal strength. Your cellular terminal or mobile contains a transmitter and receiver. When it is ON, it receives and transmits radio frequency energy. RF interference can occur if it is used close to TV set, radio, computer or other electric equipment. In locations with potentially explosive atmospheres, obey all posted signs to turn off wireless devices such as your phone or other cellular terminals. Areas with potentially explosive atmospheres include fuelling areas, below decks on boats, fuel or chemical transfer or storage facilities, areas where the air contains chemicals or particles such as grain, dust or metal powders, etc. BC95-D_Hardware_Design_Datasheet 8 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Product Concept 2.1. General Description BC95-D is a high-performance NB-IoT module with low power consumption. It supports two frequency bands as illustrated in the table below. The module is designed to communicate with mobile network operators’ infrastructure equipment through the NB-IoT radio protocol (3GPP Rel.14). Table 1: Frequency of BC95-D Module Frequency Bands Transmit Receive B111 1915MHz~1920MHz 722MHz~728MHz B222 1915MHz~1920MHz 1995MHz~2020MHz BC95-D is an SMD type module with LCC package, and comes with an ultra-compact profile of 23.6mm × 19.9mm × 2.2mm, making it can be easily embedded into applications. It provides hardware interfaces such as UART interfaces, and can meet almost all the requirements for IoT applications, such as smart metering, bike sharing, smart parking, smart city, security and asset tracking, home appliances, agricultural and environmental monitoring, etc. Designed with power saving technique, the BC95-D consumes an ultra-low current of 5uA in PSM (Power Saving Mode). The module fully complies with the RoHS directive of the European Union. 2.2. Key Features The following table describes the detailed features of BC95-D module. BC95-D_Hardware_Design_Datasheet 9 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Table 2: BC95-D Key Features Feature Details Power Supply Supply voltage: 3.1V~4.2V Typical supply voltage: 3.6V Power Saving Mode Maximum power consumption in PSM: 15uW Transmitting Power 23dBm±2dB Temperature Range Operation temperature range: -40°C ~ +85°C 1) Storage temperature range: -40°C ~ +90°C USIM Interface Supports Class B USIM card: 1.8V/3.0V UART Interfaces Main port: When used for AT command communication and data transmission, the baud rate supports 4800bps, 9600bps and 115200bps, and the default baud rate is 9600bps When used for firmware upgrading, the baud rate is 921600bps Debug port: Used for firmware debugging Only supports 921600bps baud rate UART3: Used for communication with peripheral Internet Protocol Features Supports IPv4/IPv6/UDP/Non-IP/TCP SMS Text and PDU mode Point to point MO and MT Single tone with 15kHz/3.75kHz subcarrier: 25.2kbps (DL)/ 15.625kbps (UL) Multi tone with 15kHz subcarrier: 25.2kbps (DL)/54kbps (UL) Data Transmission Feature Compliant with 3GPP TS 27.007 V14.3.0 (2017-03) and Quectel AT commands Physical Characteristics Size: (23.6±0.15) mm × (19.9±0.15) mm × (2.2±0.2) mm Weight: 1.8g±0.2g Firmware Upgrade Firmware upgrade via UART Antenna Interface 50Ω impedance control RoHS All hardware components are fully compliant with EU RoHS directive AT Commands NOTE 1) Within operation temperature range, the module is 3GPP compliant. BC95-D_Hardware_Design_Datasheet 10 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet 2.3. Functional Diagram The following figure shows a block diagram of BC95-D and illustrates the major functional parts. Radio frequency Baseband Power management Peripheral interfaces VBAT Load Switch APT DCDC Switch TX Filter RF_ANT RF_PA RX_Filter RX_Filter Balance Balance RF TRansceiver and Analogue VDD_EXT PMU Baseband Flash SRAM DCDC XTAL Driver SPI RESET USIM UARTx2 Debug UART RI NETLIGHT SPI I2C GPIO ADC DAC SWD TCXO 38.4M 32K LDO SPI Flash (Optional) Figure 1: Functional Diagram NOTE PA model: SKY77761. Baseband chip: Hi2115GBCV110. 2.4. Evaluation Board In order to help customers develop applications with BC95-D, Quectel supplies the evaluation board (EVB), USB cable, antenna and other peripherals to control or test the module. BC95-D_Hardware_Design_Datasheet 11 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Application Functions 3.1. General Description BC95-D is equipped with 54 LCC pads (with 1.1mm pitch) and 40 LGA pads (with 1.7mm pitch). The following chapters provide detailed descriptions of these pins: Power supply UART interfaces USIM interface ADC interface DAC interface SPI interface I2C interface Network status indication RF interface BC95-D_Hardware_Design_Datasheet 12 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet VBAT VBAT RESERVED GND GND RESERVED RESERVED 44 GND 45 GND 46 RF_ANT 47 48 52 49 53 50 54 RESERVED UART3_TXD UART3_RXD SPI_CS 10 SPI_MISO 11 SPI_CLK 12 SPI_MOSI 13 14 RESET 15 RIO* 16 75 90 70 56 76 89 69 57 77 68 78 87 67 59 79 86 66 60 80 81 82 83 84 61 62 63 64 PIO2 USIM 65 VDD_EXT DAC RESERVED ADC UART RESERVED DBG_TXD ADC/DAC RESERVED DBG_RXD I2C 85 NETLIGHT PIO1 SPI 88 58 17 RESERVED 55 27 91 26 RESERVED 92 25 93 24 RESERVED 94 23 22 SWD_CLK 71 21 SWD_IO 72 20 73 19 GND 74 18 RESERVED POWER 51 GND 3.2. Pin Assignment ANT GND 43 GND 42 USIM_GND 41 USIM_CLK 40 USIM_DATA 39 USIM_RST 38 USIM_VDD 37 USIM_DETECT 36 I2C_SDA 35 I2C_SCL 34 RI 33 RESERVED 32 RTS* 31 CTS* 30 TXD 29 RXD 28 RESERVED RESERVED OTHERS Figure 2: Pin Assignment NOTES 1. Keep all reserved pins unconnected. 2. “*” means under development. BC95-D_Hardware_Design_Datasheet 13 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet 3.3. Pin Description The following tables show the pin definition and description of BC95-D. Table 3: I/O Parameters Definition Type Description IO Bidirectional DI Digital input DO Digital output PI Power input PO Power output AI Analog input AO Analog output OD Open drain Table 4: Pin Description Power Supply Pin Name VBAT VDD_ EXT Pin No. 45, 46 26 I/O Description DC Characteristics Comment PI Main power supply of the module: VBAT=3.1V~ 4.2V Vmax=4.2V Vmin=3.1V Vnorm=3.6V The power supply must be able to provide sufficient current up to 0.8A. Vmax=3.3V Vmin=2.7V Vnorm=3V IOmax=20mA If it is used for power supply, a 2.2uF~4.7uF bypass capacitor is recommended to be added in active and idle modes. In PSM, it cannot be used for PO Supply 3.0V voltage for external circuits BC95-D_Hardware_Design_Datasheet 14 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet power supply. If unused, keep this pin open. GND 2, 43, 47, 48, 51, 52, 54, 59~66, 71~74, 81~83, 92~94 Ground Reset Interface Pin Name RESET Pin No. 15 I/O Description DC Characteristics Comment DI Reset the module RPU≈78kΩ VIHmax=3.3V VIHmin=2.1V VILmax=0.6V Pull up internally. Active low. Network Status Indicator Pin Name Pin No. I/O Description DC Characteristics Comment NETLIGHT 18 DO Network status indication VOLmax=0.3V VOHmin=2.4V If unused, keep this pin open. I/O Description DC Characteristics Comment AI General purpose analog to digital converter interface Input voltage range: 0V~4.0V The maximum input voltage should be lower than the VBAT voltage. If unused, keep this pin open. Minimum input impedance: 100MΩ AO General purpose digital to analog converter interface Output voltage range: Type: 3.5mV If unused, keep this pin open. I/O Description DC Characteristics Comment Analog Interface Pin Name ADC DAC Pin No. 21 22 Main UART Port Pin Name Pin No. BC95-D_Hardware_Design_Datasheet 15 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet RXD 29 DI Receive data VILmax=0.6V VIHmin=2.1V VIHmax=3.3V TXD 30 DO Transmit data VOLmax=0.3V VOHmin=2.4V CTS* 31 DI Clear to Send VOLmax=0.3V VOHmin=2.4V RTS* 32 DO Request to Send VOLmax=0.3V VOHmin=2.4V RI 34 DO Ring indicator VOLmax=0.3V VOHmin=2.4V Pin Name Pin No. I/O Description DC Characteristics UART3_ TXD DI Receive data VOLmax=0.3V VOHmin=2.4V UART3_ RXD DO Transmit data VOLmax=0.3V VOHmin=2.4V Pin No. I/O Description DC Characteristics Comment If unused, keep these pins open. 3.0V power domain. UART3 Port Comment VOLmax=0.3V VOHmin=2.4V Debug Port Pin Name DBG_ RXD 19 DI Receive data VILmax=0.6V VIHmin=2.1V VIHmax=3.3V DBG_ TXD 20 DO Transmit data VOLmax=0.3V VOHmin=2.4V If unused, keep these pins open. Comment USIM Interface Pin Name Pin No. I/O Description DC Characteristics USIM_ VDD 38 DO Power supply for USIM card Vnorm=1.8/3.0V USIM card reset signal VOLmax=0.1V×USIM_ VDD VOHmin=0.8V×USIM_ VDD USIM card data signal VOLmax=0.1V×USIM_ VDD VOHmin=0.8V×USIM_ VDD VILmin=-0.1V×USIM_ VDD VILmax=0.2V×USIM_ USIM_ RST USIM_ DATA 39 40 DO IO BC95-D_Hardware_Design_Datasheet All signals of USIM interface should be protected against ESD with a TVS diode array. Maximum trace length from the module pad to USIM card connector is 200mm. 16 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet VDD VIHmin=0.7V×USIM_ VDD VIHmax=1.1V×USIM_ VDD USIM_ CLK USIM_ DETECT USIM_GND 41 37 DO DI USIM card clock signal VOLmax=0.1V×USIM_ VDD VOHmin=0.8V×USIM_ VDD USIM card plug detect VILmin=-0.1V×USIM_ VDD VILmax=0.2V×USIM_ VDD VIHmin=0.7V×USIM_ VDD VIHmax=1.1V×USIM_ VDD All signals of USIM interface should be protected against ESD with a TVS diode array. Maximum trace length from the module pad to USIM card connector is 200mm. Specified ground for USIM card 42 SPI Interface Pin Name Pin No. I/O Description DC Characteristics SPI_CS 10 DO SPI chip select VOLmax=0.3V VOHmin=2.4V SPI_MISO 11 DI SPI master input VILmin=-0.3V VILmax=0.6V VIHmin=2.1V VIHmax=3.3V SPI_CLK 12 DO SPI clock VOLmax=0.3V VOHmin=2.4V SPI_MOSI 13 DO SPI master output VOLmax=0.3V VOHmin=2.4V Pin Name Pin No. I/O Description DC Characteristics I2C_SCL 35 DO I2C clock I2C_SDA 36 IO I2C data Comment 3.0V power domain. If unused, keep it open. I2C Interface Comment An external pull-up resistor is required. 3.0V power domain. If unused, keep it open. Other Interfaces BC95-D_Hardware_Design_Datasheet 17 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Pin Name I/O Description DC Characteristics Comment IO Analogue PA control input/output interface VILmin=-0.3V VILmax=0.6V VIHmin=2.1V VIHmax=3.3V 3.0V power domain. If unused, keep it open. IO General purpose input/output interface VILmin=-0.3V VILmax=0.6V VIHmin=2.1V VIHmax=3.3V 3.0V power domain. If unused, keep it open. 27 IO General purpose input output interface VILmin=-0.3V VILmax=0.6V VIHmin=2.1V VIHmax=3.3V 3.0V power domain. If unused, keep it open. Pin Name Pin No. I/O Description DC Characteristics RF_ANT 53 IO RF antenna pad I/O Description RIO* PIO1 PIO2 Pin No. 16 17 RF Interface Comment Impedance of 50Ω RESERVED Pins Pin Name Pin No. RESERVED 1, 5, 6, 7, 14, 23~25, 28, 33, 44, 49, 50, 55~58, 67~70, 75~80, 84~91 Reserved DC Characteristics Comment Keep these pins unconnected. NOTE “*” means under development. 3.4. Operating Modes BC95-D module has three operating modes, which can determine the availability of functions for different levels of power-saving. BC95-D_Hardware_Design_Datasheet 18 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Table 5: Overview of Operating Modes Mode Function Normal Operation Active In active mode, all functions of the module are available and all processors are active. Radio transmission and reception can be performed. Transitions to idle mode or PSM can be initiated in active mode. Idle In idle mode, the module is in light sleep and network connection is maintained; paging messages can be received; transitions to active mode or PSM can be initiated in idle mode. PSM In PSM, only the 32kHz RTC is working. The network is disconnected, and paging messages cannot be received either. When MO (Mobile Originated) data are sent or the periodic TAU (Tracking Area Update) timer T3412 expires, the module will be woken up. 3.5. Power Supply 3.5.1. Power Supply Pins BC95-D provides two VBAT pins for connection with an external power supply. The following table shows the VBAT pins and ground pins. Table 6: VBAT and GND Pins Pin Name Pin No. Description Min. Typ. Max. Unit VBAT 45, 46 Power supply for the module 3.1 3.6 4.2 GND 2, 43, 47, 48, 51, 52, 54, 59~66, 71~74, 81~83, 92~94 Ground 3.5.2. Reference Design for Power Supply The power design for the module is very important, as the performance of the module largely depends on the power source. A low quiescent current LDO which can provide sufficient input current up to 0.5A can be used as the power supply. Meanwhile, Li-SOCI2 batteries can also be used to supply power for the module. The power supply range of the module is from 3.1V to 4.2V. Please make sure that the input voltage will never drop below 3.1V or rise above 4.2V even in burst transmission. If the power voltage drops below 3.1V or rise above 4.2V, the module will be abnormal. BC95-D_Hardware_Design_Datasheet 19 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet For better power performance, it is recommended to place a 100uF tantalum capacitor with low ESR (ESR=0.7Ω) and three ceramic capacitors (100nF, 100pF and 22pF) near the VBAT pin, and a TVS diode also needs to be added on the VBAT trace to increase surge voltage withstand capability. A reference circuit is illustrated in the following figure. In principle, the longer the VBAT trace is, the wider it will be. Module VBAT VBAT D1 WS4.5DPV C1 100uF C2 100nF C3 C4 100pF 0402 22pF 0402 GND GND Figure 3: Reference Circuit for Power Supply 3.6. Turn on and off Scenarios 3.6.1. Turn on The module can be automatically turned on by supplying power source to VBAT pins. Delay<535us 3.0V VBAT RESET Figure 4: Turn-on Timing BC95-D_Hardware_Design_Datasheet 20 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet 3.6.2. Turn off The module can be turned off by shutting down the VBAT power supply. Delay>5ms VBAT 3.0V RESET Figure 5: Turn-off Timing 3.6.3. Reset the Module The module can be reset by the following two ways. The reset timing is illustrated as the following table. Hardware Reset the module by driving the reset pin to a low level voltage for more than 100ms. Software Reset the module using command AT+NRB. For more details about the command, please refer to document [1]. Table 7: Reset Characteristics Pin Name Pin No. Description RESET 15 Reset the module. Active low Reset Pull-down Time >100ms The recommended circuits of hardware resetting are shown as below. An open drain/collector driver or button can be used to control the RESET pin. BC95-D_Hardware_Design_Datasheet 21 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet RESET 4.7K Reset pulse 47K Figure 6: Reference Circuit of RESET by Using Driving Circuit S1 RESET TVS Close to S1 Figure 7: Reference Circuit of RESET by Using Button 3.7. Power Saving Mode (PSM) Based on system performance, the module consumes a maximum current of 5uA in PSM. PSM is designed to reduce power consumption of the module and improve battery life. The following figure shows the power consumption of the module in different modes. BC95-D_Hardware_Design_Datasheet 22 / 55 Reception Transmission Power Consumption NB-IoT Module Series BC95-D Hardware Design Datasheet Idle T3324 UE inactive time PSM T3412 Idle TAU Figure 8: Module Power Consumption in Different Modes The procedure for entering PSM is as follows: the module requests to enter PSM in “ATTACH REQUEST” message during attach/TAU (Tracking Area Update) procedure. Then the network accepts the request and provides an active time value (T3324) to the module and the mobile reachable timer starts. When the T3324 timer expires, the module enters PSM for duration of T3412 (periodic TAU timer). Please note that the module cannot request PSM when it is establishing an emergency attachment or initializing the PDN (Public Data Network) connection. When the module is in PSM, it cannot be paged and stops access stratum activities such as cell reselection, and T3412 is still active. When MO (Mobile Originated) data are sent or the periodic TAU timer expires, the module will exit from PSM. 3.8. UART Interfaces The module provides three UART ports: main port, UART3 and debug port. The module is designed as DCE (Data Communication Equipment), following the traditional DCE-DTE (Data Terminal Equipment) connection. The main port: TXD: Send data to RXD of DTE. RXD: Receive data from TXD of DTE. CTS*: Clear to Send RTS*: Request to Send RI: Ring indicator (when an SMS message is received or data is transmitted, the module will output signals to inform DTE). BC95-D_Hardware_Design_Datasheet 23 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet The UART3 port: UART3_TXD: Send data to RXD of DTE. UART3_RXD: Receive data from TXD of DTE. The debug port: DBG_TXD: Send data to the COM port of DTE. DBG_RXD: Receive data from the COM port of DTE. The logic levels are described in the following table. Table 8: Pin Definition of the UART Interfaces Interfaces Main Port Pin No. Pin Name Description 29 RXD Receive data 30 TXD Transmit data 31 CTS* Clear to Send 32 RTS* Request to Send 34 RI Ring indicator UART3_TXD Transmit data UART3_RXD Receive data 19 DBG_RXD Receive data 20 DBG_TXD Transmit data Comment Power domain: 3.0V UART3 Port Debug Port Table 9: Logic Levels of the UART Interfaces Parameter Min. Max. Unit VIL -0.3 0.6 VIH 2.1 3.3 0.3 3.0 VOL VOH 2.4 BC95-D_Hardware_Design_Datasheet 24 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Table 10: UART and LPUART Settings Parameter Supported Value UART Baud Rate 45.8bps to 3Mbps1) LPUART Baud Rate 128bps to 57600bps Parity Even/Odd/None Number of Stop Bits 1 or 2 bits Data Bits Per Frame 5, 6, 7 or 8 bits NOTES 1. “*” means under development. 2. 1) 1Mbps baud rate should always be supported, and a higher baud rate can be configured according to actual needs. 3.8.1. Main Port The main port can be used for AT command communication and data transmission, and in such case the baud rate supports 4800bps, 9600bps and 115200bps, and the default baud rate is 9600bps. It can also be used for firmware upgrading and in such case the baud rate is 921600bps. This main port is available in active mode, idle mode and PSM. For more information about firmware upgrading, please refer to document [2]. The following figure shows the connection between the DCE and DTE. Module (DCE) Main port PC (DTE) Serial port TXD TXD RXD RXD RI GND RING GND Figure 9: Reference Design for Main Port BC95-D_Hardware_Design_Datasheet 25 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet 3.8.2. Debug Port The debug port is used to view log information with the UEMonitor tool for firmware debugging, and the baud rate is 921600bps. For detailed usage of the UEMonitor, please refer to document [3]. A reference design for debug port is shown as below. Module (DCE) PC (DTE) Debug port Serial port DBG_TXD DBG_TXD DBG_RXD DBG_RXD GND GND Figure 10: Reference Design for Debug Port 3.8.3. UART Application A reference design of 3.3V level match is shown as below. Peripheral TXD RXD EINT Module 1K RXD 1K TXD 1K RI GND Voltage level: 3.3V GND RXD TXD GND VBAT Test points RESET VBAT RESET Figure 11: Level Match Design for 3.3V System BC95-D_Hardware_Design_Datasheet 26 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet NOTES 1. In order to reduce the power consumption of the system, it is highly recommended to add a resistor with resistance greater than 1KΩ on the UART port signal traces when the host’s voltage level is 3V or 3.3V. 2. It is recommended to reserve the test points (GND, RXD, TXD, VBAT and RESET) for firmware upgrading. The following circuit shows a reference design for the communication between the module and PC. As the voltage level of module is 3.0V, a RS-232 transceiver must be used. Please make sure the I/O voltage of transceiver which connects to module is 3.0V. C1+ V+ GND C1- GND GND C2+ VCC C2- V- 3.3V Module T1IN TXD RI 1K 1K T2OUT T2IN T1OUT T3IN T5OUT T4IN T3OUT T5IN T4OUT RXD To PC Main Serial Port /R1OUT 1K GND R1OUT R1IN R2OUT R2IN R3OUT R3IN GND RS-232 Transceiver GND Figure 12: Sketch Map for RS-232 Interface Match Please visit vendors’ web sites to select a suitable RS-232 transceiver IC, such as: http://www.exar.com and http://www.maximintegrated.com. 3.9. USIM Interface The module provides one USIM interface to allow the module to access an external USIM card. The USIM interface supports the functionality of the 3GPP specification, and is intended for use with a USIM application tool-kit. The USIM card interface is powered by an internal regulator in the module. Both 1.8V and 3.0V USIM cards are supported. BC95-D_Hardware_Design_Datasheet 27 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Table 11: Pin Definition of the USIM Interface Pin No. Pin Name Description 37 USIM_DETECT USIM card plug in detect 38 USIM_VDD Supply power for USIM card USIM card voltage domain is 1.8V/3.0V±5% 41 USIM_CLK USIM card clock signal 40 USIM_DATA USIM card data signal 39 USIM_RST USIM card reset signal 42 USIM_GND Specified ground for USIM card A reference circuit for 6-pin USIM card connector is illustrated as the following figure. 100nF USIM_GND Module USIM_VDD USIM_RST USIM_CLK USIM_DATA USIM Card Connector VCC RST CLK 22R 22R GND VPP IO 22R 33pF33pF 33pF TVS GND GND Figure 13: Reference Circuit for USIM Interface with 6-pin USIM Card Connector For more information of USIM card connector, please visit http://www.amphenol.com and http://www.molex.com. In order to enhance the reliability and availability of the USIM card in application, please follow the criteria below in USIM circuit design: Keep placement of USIM card connector to the module as close as possible. Keep the trace length as less than 200mm as possible. Keep USIM card signals away from RF and VBAT traces. Assure the ground between module and USIM card connector short and wide. Keep the trace width of ground no less than 0.5mm to maintain the same electric potential. The decouple capacitor of USIM_VDD is less than 1uF and must be near to USIM card connector. BC95-D_Hardware_Design_Datasheet 28 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet To avoid cross talk between USIM_DATA and USIM_CLK, keep them away from each other and shield them with surrounded ground. USIM_RST should also be ground shielded. In order to offer good ESD protection, it is recommended to add a TVS diode array. For more information of TVS diode, please visit http://www.onsemi.com. The most important rule is to place the ESD protection device close to the USIM card connector and make sure the USIM card interface signal traces being protected will go through the ESD protection device first and then lead to the module. The 22Ω resistors should be connected in series between the module and the USIM card connector so as to suppress EMI spurious transmission and enhance ESD protection. Please note that the USIM peripheral circuit should be close to the USIM card connector. Place the RF bypass capacitors (33pF) close to the USIM card connector on all signals traces to improve EMI suppression. 3.10. ADC Interface The module provides a 10-bit ADC input channel to read the voltage value. This ADC interface is available in both active and idle modes. Table 12: Pin Definition of the ADC Pin Name Pin No. Description ADC 21 Analog to digital converter interface Table 13: Characteristics of the ADC Item Full-scale Range (FSR) Min. Typ. Max. Unit Gain=0 1.45 Gain=1 Gain=2 2.5 Gain=3 Gain=4 3.5 Gain=5 Sampling Frequency Input Impedance 100 BC95-D_Hardware_Design_Datasheet MHz MΩ 29 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Supply Current (from VBAT) 350 uA INL Offset -10 Overall Accuracy1) -2.5 lsb 10 mV +2.5 NOTE 1)The overall accuracy is measured after calibration against internal reference. 3.11. DAC Interface The module provides a 10-bit DAC output channel. Table 14: Pin Definition of the DAC Pin Name Pin No. Description DAC 22 Digital to analog converter interface Table 15: Characteristics of the DAC Item LSB Voltage Step Min. Typ. Max. Unit Gain=0 1.2 mV Gain=1 2.0 mV Gain=2 2.8 mV Gain=3 3.5 mV LSB Voltage Step Accuracy -4 Zero Crossing Offset (Nominal Output at 0 Input) -75 Linearity, INL (VOUT > 20mV) BC95-D_Hardware_Design_Datasheet 75 mV LSB 30 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Linearity, DNL LSB 150 uA mA Output Driver Impedance (C load < 20pF) Ω Output Driver Impedance (Any C Load) 200 Ω Maximum Signal Frequency 500 kHz RMS Output Noise 0.5 LSB Supply Current (at Zero Output Load) Output Current Capability 100 -1 3.12. SPI Interface The module provides a serial peripheral interface (SPI). Table 16: Pin Definition of the SPI Pin Name Pin No. Description SPI_CS 10 SPI chip select SPI_MISO 11 SPI master input SPI_CLK 12 SPI clock SPI_MOSI 13 SPI master output 3.13. I2C Interface The module provides an I2C interface. Table 17: Pin Definition of the I2C Pin Name Pin No. Description I2C_SCL 35 I2C clock BC95-D_Hardware_Design_Datasheet 31 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet I2C_SDA 36 I2C data 3.14. Behaviors of RI When an SMS message is received or certain URCs are reported, RI pin will be triggered. The behaviors of RI are shown as below. Table 18: Behaviors of RI State RI Response Idle HIGH SMS When an SMS message is received, the RI is changed to LOW and kept at low level for about 120ms. Then it is changed to HIGH. URC Certain URCs can trigger RI to LOW for 120ms before the URC comes out. Then it is changed to HIGH. HIGH RI 120ms Output message LOW Idle A URC or SMS message is received Figure 14: Behaviors of RI when a URC or SMS Message is Received NOTE Pleas pull down the RI pin for more than 120ms, the maximum time depends on the URC data output length and the baud rate of the serial port. BC95-D_Hardware_Design_Datasheet 32 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet 3.15. Network Status Indication The NETLIGHT signal can be used to drive a network status indication LED. The working state of this pin is listed in the following table. Table 19: Working State of NETLIGHT State Module Function Low (Light off) The module is not working or not attached to network. High (Light on) The module is attached to network. A reference circuit is shown as below. VBAT Module 2.2K NETLIGHT 4.7K 47K Figure 15: Reference Design for NETLIGHT BC95-D_Hardware_Design_Datasheet 33 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Antenna Interface The pin 53 is the RF antenna pad. The impedance of the antenna port is 50Ω. Table 20: Pin Definition of the RF Antenna Interface Pin Name Pin No. Description GND 51 Ground GND 52 Ground RF_ANT 53 RF antenna pad GND 54 Ground 4.1. RF Antenna Reference Design A reference design for RF antenna is shown as below. GND R1 0R RF_ANT GND Module C1 NM C2 NM Figure 16: Reference Design for RF Antenna BC95-D provides an RF antenna pad for antenna connection. There is a ground pad on each side of the antenna pad in order to give a better grounding. Additionally, a π-type matching circuit is recommended to be used to adjust the RF performance. Please place the π-type matching components (R1/C1/C2) as close to the antenna as possible, and mount them according to actual needs. The capacitors (C1/C2) are BC95-D_Hardware_Design_Datasheet 34 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet not mounted and a 0Ω resistor is mounted on R1 by default. 4.2. Reference Design of RF Layout For user’s PCB, the characteristic impedance of all RF traces should be controlled as 50Ω±10%. The impedance of the RF traces is usually determined by the trace width (W), the materials’ dielectric constant, the distance between signal layer and reference ground (H), and the clearance between RF trace and ground (S). Microstrip line or coplanar waveguide line is typically used in RF layout for characteristic impedance control. The following are reference designs of microstrip line or coplanar waveguide line with different PCB structures. Figure 17: Microstrip Line Design on a 2-layer PCB Figure 18: Coplanar Waveguide Line Design on a 2-layer PCB BC95-D_Hardware_Design_Datasheet 35 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Figure 19: Coplanar Waveguide Line Design on a 4-layer PCB (Layer 3 as Reference Ground) Figure 20: Coplanar Waveguide Line Design on a 4-layer PCB (Layer 4 as Reference Ground) In order to ensure RF performance and reliability, the following principles should be complied with in RF layout design: Use an impedance simulation tool to control the characteristic impedance of RF traces as 50Ω±10%. The GND pins adjacent to RF pins should not be designed as thermal relief pads, and should be fully connected to ground. The distance between the RF pins and the RF connector should be as short as possible, and all the right angle traces should be changed to curved ones. There should be clearance area under the signal pin of the antenna connector or solder joint. The reference ground of RF traces should be complete. Meanwhile, adding some ground vias around RF traces and the reference ground could help to improve RF performance. The distance between the ground vias and RF traces should be no less than two times the width of RF signal traces (2*W). For more details about RF layout, please refer to document [5]. BC95-D_Hardware_Design_Datasheet 36 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet 4.3. RF Output Power Table 21: RF Output Power (Uplink QPSK and BPSK Modulation) Frequency Max. Min. 1915MHz~1920MHz 23dBm±2dB <-40dBm NOTE The design is compliant with the NB-IoT radio protocol 3GPP Rel.14. 4.4. RF Receiving Sensitivity Table 22: RF Receiving Sensitivity (Throughput ≥ 95%) Frequency Receiving Sensitivity 722MHz~728MHz -129dBm±2dB 1995MHz~2020MHz -129dBm±2dB NOTE The RF receiving sensitivity is tested under target BLER=10%, 1T1R, AWGN and MCS0 with Rep128. 4.5. Operating Frequencies Table 23: Operating Frequencies Frequency Bands Transmit Receive B111 1915MHz~1920MHz 722MHz~728MHz BC95-D_Hardware_Design_Datasheet 37 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet B222 1915MHz~1920MHz 1995MHz~2020MHz 4.6. Antenna Requirement The following table shows the requirement on NB-IoT antenna. Table 24: Antenna Requirement Type Requirement Frequency Range 720MHz~730MHz; 1915MHz~2020MHz Max Input Power (W) Input Impedance (Ω) 50 Polarization Type Linear 4.7. Recommended RF Connector for Antenna Installation If RF connector is used for antenna connection, it is recommended to use SMA-F connector. BC95-D_Hardware_Design_Datasheet 38 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Electrical, Reliability and Radio Characteristics 5.1. Absolute Maximum Ratings Absolute maximum ratings for power supply and voltage on digital and analog pins of the module are listed in the following table. Table 25: Absolute Maximum Ratings Parameter Min. Max. Unit VBAT -0.3 +4.25 Current of Power Supply 0.8 Voltage at Digital Pins -0.3 +4.25 Voltage at Analog Pins -0.3 +4.25 Voltage at Digital/Analog Pins in Power Down Mode -0.25 +0.25 5.2. Operation and Storage Temperatures The operation and storage temperatures are listed in the following table. Table 26: Operation and Storage Temperatures Parameter Min. Typ. Max. Unit Operation Temperature Range1) -40 +25 +85 ºC BC95-D_Hardware_Design_Datasheet 39 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Storage Temperature Range -40 +90 ºC NOTE 1) Within operation temperature range, the module is 3GPP compliant. 5.3. Current Consumption The values of current consumption are shown below. Table 27: Current Consumption Parameter Description Conditions PSM Idle mode IVBAT Active mode Min. Typ. Max. Unit Deep sleep state 3.6 uA Standby state @DRX=1.28s mA Radio transmission @23dBm (Single-tone) 250 mA Radio transmission @23dBm (Multi-tone) 350 mA Radio transmission @25dBm (Single-tone) 350 mA Radio reception 50 mA 5.4. Electrostatic Discharge The module is not protected against electrostatic discharge (ESD) in general. Consequently, it is subject to ESD handling precautions that typically apply to ESD sensitive components. Proper ESD handling and packaging procedures must be applied throughout the processing, handling and operation of any application that incorporates the module. The following table shows the module’s electrostatic discharge characteristics. BC95-D_Hardware_Design_Datasheet 40 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Table 28: Electrostatic Discharge Characteristics Test Points Contact Discharge Air Discharge Unit VBAT, GND ±5 ±10 kV Antenna Interface ±5 ±10 kV Other Interfaces ±0.5 ±1 kV BC95-D_Hardware_Design_Datasheet 41 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Mechanical Dimensions This chapter describes the mechanical dimensions of the module. All dimensions are measured in mm. The tolerances for dimensions without tolerance values are ±0.05mm. 6.1. Mechanical Dimensions of the Module Figure 21: Module Top and Side Dimensions BC95-D_Hardware_Design_Datasheet 42 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Figure 22: Module Bottom Dimensions (Bottom View) BC95-D_Hardware_Design_Datasheet 43 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet 6.2. Recommended Footprint Figure 23: Recommended Footprint (Top View) NOTES 1. For easy maintenance of the module, please keep about 3mm between the module and other components in the host PCB. 2. All RESERVED pins must not be connected to GND. BC95-D_Hardware_Design_Datasheet 44 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet 6.3. Design Effect Drawings of the Module Figure 24: Top View of the Module Figure 25: Bottom View of the Module NOTE These are design effect drawings of BC95-D module. For more accurate pictures, please refer to the module that you get from Quectel. BC95-D_Hardware_Design_Datasheet 45 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Storage, Manufacturing and Packaging 7.1. Storage BC95-D module is stored in a vacuum-sealed bag. It is rated at MSL 3, and its storage restrictions are shown as below. 1. Shelf life in the vacuum-sealed bag: 12 months at <40ºC/90%RH. 2. After the vacuum-sealed bag is opened, devices that will be subjected to reflow soldering or other high temperature processes must be: Mounted within 168 hours at the factory environment of ≤30ºC/60% RH. Stored at <10% RH. 3. Devices require baking before mounting, if any circumstance below occurs: When the ambient temperature is 23ºC±5ºC and the humidity indication card shows the humidity is >10% before opening the vacuum-sealed bag. Device mounting cannot be finished within 168 hours at factory conditions of ≤30ºC/60% 4. If baking is required, devices may be baked for 8 hours at 120ºC±5ºC. NOTE As the plastic package cannot be subjected to high temperature, it should be removed from devices before high temperature (120ºC) baking. If shorter baking time is desired, please refer to the IPC/JEDECJ-STD-033 for baking procedure. BC95-D_Hardware_Design_Datasheet 46 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet 7.2. Manufacturing and Soldering Push the squeegee to apply the solder paste on the surface of stencil, thus making the paste fill the stencil openings and then penetrate to the PCB. The force on the squeegee should be adjusted properly so as to produce a clean stencil surface on a single pass. To ensure the module soldering quality, the thickness of stencil for the module is recommended to be 0.15mm. For more details, please refer to document [4]. It is suggested that the peak reflow temperature is 235ºC~245ºC (for SnAg3.0Cu0.5 alloy). The absolute max reflow temperature is 260ºC. To avoid damage to the module caused by repeatedly heating, it is suggested that the module should be mounted after reflow soldering for the other side of PCB has been completed. Recommended reflow soldering thermal profile is shown below. ºC Preheat Heating Cooling 250 Liquids Temperature 217 200ºC 200 40s~60s Temperature 160ºC 150 70s~120s 100 Between 1~3ºC/s 50 50 100 150 200 250 300 Time Figure 26: Reflow Soldering Thermal Profile NOTES 1. During manufacturing and soldering, or any other processes that may contact the module directly, NEVER wipe the module’s shielding can with organic solvents, such as acetone, ethyl alcohol, isopropyl alcohol, trichloroethylene, etc. Otherwise, the shielding can may become rusted. BC95-D_Hardware_Design_Datasheet 47 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet 2. The shielding can for the module is made of Cupro-Nickel base material. It is tested that after 12 hours’ Neutral Salt Spray test, the laser engraved label information on the shielding can is still clearly identifiable and the QR code is still readable, although white rust may be found. 7.3. Packaging The modules are stored inside a vacuum-sealed bag which is ESD protected. It should not be opened until the devices are ready to be soldered onto the application. 7.3.1. Tape and Reel Packaging The reel is 330mm in diameter and each reel contains 250 modules. Figure 27: Tape Dimensions BC95-D_Hardware_Design_Datasheet 48 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet DETAIL:A PS DETAIL:A Figure 28: Reel Dimensions BC95-D_Hardware_Design_Datasheet 49 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet Appendix A References Table 29: Related Documents SN Document Name Remark [1] Quectel_BC95-D_AT_Commands_Manual BC95-D AT Commands Manual [2] Quectel_BC95-D_Firmware_Upgrade_User_Guide BC95-D Firmware Upgrade User Guide [3] Quectel_BC95-D_UEMonitor_User_Guide BC95-D UEMonitor User Guide [4] Quectel_Module_Secondary_SMT_User_Guide Module Secondary SMT User Guide [5] Quectel_RF_Layout_Application_Note RF Layout Application Note [6] NL-002871-SP-2C-Hi2115 C30 Datasheet Datasheet on which this document is based [7] Quectel_BC95-D_Reference_Design BC95-D Reference Design Table 30: Terms and Abbreviations Abbreviation Description ADC Analog-to-Digital Converter AS Access Stratum DAC Digital-to-Analog Converter DCE Data Communications Equipment (typically module) DNL Differential Nonlinearity DTE Data Terminal Equipment (typically computer, external controller) DRX Discontinuous Reception H-FDD Half Frequency Division Duplexing BC95-D_Hardware_Design_Datasheet 50 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet I/O Input/Output IC Integrated Circuit Imax Maximum Load Current INL Integral Nonlinearity Inorm Normal Current kbps Kilo Bits Per Second LED Light Emitting Diode LPUART Low Power Universal Asynchronous Receiver/Transmitter LSB Least Significant Bit MME Mobility Management Entity MO Mobile Originated NB-IoT Narrow Band Internet of Things PCB Printed Circuit Board PDN Public Data Network PSM Power Saving Mode RF Radio Frequency RoHS Restriction of Hazardous Substances RTC Real Time Clock RX Receive Direction USIM Universal Subscriber Identification Module SMS Short Message Service TAU Tracking Area Update TE Terminal Equipment TX Transmitting Direction UART Universal Asynchronous Receiver & Transmitter BC95-D_Hardware_Design_Datasheet 51 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet URC Unsolicited Result Code VSWR Voltage Standing Wave Ratio Vmax Maximum Voltage Value Vnorm Normal Voltage Value Vmin Minimum Voltage Value VIHmax Maximum Input High Level Voltage Value VIHmin Minimum Input High Level Voltage Value VILmax Maximum Input Low Level Voltage Value VILmin Minimum Input Low Level Voltage Value VImax Absolute Maximum Input Voltage Value VImin Absolute Minimum Input Voltage Value VOHmax Maximum Output High Level Voltage Value VOHmin Minimum Output High Level Voltage Value VOLmax Maximum Output Low Level Voltage Value VOLmin Minimum Output Low Level Voltage Value BC95-D_Hardware_Design_Datasheet 52 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet FCC Certification Requirements. According to the definition of mobile and fixed device is described in Part 2.1091(b), this device is a mobile device. And the following conditions must be met: 1. This Modular Approval is limited to OEM installation for mobile and fixed applications only. The antenna installation and operating configurations of this transmitter, including any applicable source-based timeaveraging duty factor, antenna gain and cable loss must satisfy MPE categorical Exclusion Requirements of 2.1091. 2. The EUT is a mobile device; maintain at least a 20 cm separation between the EUT and the user’s body and must not transmit simultaneously with any other antenna or transmitter. 3.A label with the following statements must be attached to the host end product: This device contains FCC ID: XMR201807BC95D. 4.To comply with FCC regulations limiting both maximum RF output power and human exposure to RF radiation, maximum antenna gain (including cable loss) must not exceed: ❒ Band111(Tx: 1915MHz~1920MHz): <4dBi ❒ Band222(Tx: 1915MHz~1920MHz): <4dBi 5. This module must not transmit simultaneously with any other antenna or transmitter 6. The host end product must include a user manual that clearly defines operating requirements and conditions that must be observed to ensure compliance with current FCC RF exposure guidelines. For portable devices, in addition to the conditions 3 through 6 described above, a separate approval is required to satisfy the SAR requirements of FCC Part 2.1093 If the device is used for other equipment that separate approval is required for all other operating configurations, including portable configurations with respect to 2.1093 and different antenna configurations. BC95-D_Hardware_Design_Datasheet 53 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet For this device, OEM integrators must be provided with labeling instructions of finished products. Please refer to KDB784748 D01 v07, section 8. Page 6/7 last two paragraphs: A certified modular has the option to use a permanently affixed label, or an electronic label. For a permanently affixed label, the module must be labeled with an FCC ID - Section 2.926 (see 2.2 Certification (labeling requirements) above). The OEM manual must provide clear instructions explaining to the OEM the labeling requirements, options and OEM user manual instructions that are required (see next paragraph). For a host using a certified modular with a standard fixed label, if (1) the module’s FCC ID is not visible when installed in the host, or (2) if the host is marketed so that end users do not have straightforward commonly used methods for access to remove the module so that the FCC ID of the module is visible; then an additional permanent label referring to the enclosed module: “Contains Transmitter Module FCC ID: XMR201807BC95D” or “Contains FCC ID: XMR201807BC95D” must be used. The host OEM user manual must also contain clear instructions on how end users can find and/or access the module and the FCC ID. The final host / module combination may also need to be evaluated against the FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device. The user’s manual or instruction manual for an intentional or unintentional radiator shall caution the user that changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. In cases where the manual is provided only in a form other than paper, such as on a computer disk or over the Internet, the information required by this section may be included in the manual in that alternative form, provided the user can reasonably be expected to have the capability to access information in that form. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the manufacturer could void the user’s authority to BC95-D_Hardware_Design_Datasheet 54 / 55 NB-IoT Module Series BC95-D Hardware Design Datasheet operate the equipment. To ensure compliance with all non-transmitter functions the host manufacturer is responsible for ensuring compliance with the module(s) installed and fully operational. For example, if a host was previously authorized as an unintentional radiator under the Declaration of Conformity procedure without a transmitter certified module and a module is added, the host manufacturer is responsible for ensuring that the after the module is installed and operational the host continues to be compliant with the Part 15B unintentional radiator requirements. BC95-D_Hardware_Design_Datasheet 55 / 55
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