SP481, SP483, SP485 Datasheet. Www.s Manuals.com. 20040728 Sipex

User Manual: Datasheets SP485, SP485CN, SP485CN-L, SP485CS, SP485CS-L, SP485EN, SP485EN-L, SP485ES, SP485ES-L.

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SP481/SP483/SP485

Low Power Half-Duplex RS-485 Transceivers

FEATURES

■+5V Only

■Low Power BiCMOS

■Driver/Receiver Enable

■Slew Rate Limited Driver for

Low EMI (SP483)

■Low Power Shutdown Mode (SP481

and SP483)

■RS-485 and RS-422 Drivers/Receivers

Vcc

GND

SP481, SP483, and SP485

The SP481, SP483, and the SP485 are a family of half-duplex transceivers that meet the

requirements of RS-485 and RS-422. Their BiCMOS design allows low power operation

without sacrificing performance. The SP481 and SP485 meet the requirements of RS-485

and RS-422 up to 5Mbps. Additionally, the SP481 is equipped with a low power Shutdown

mode. The SP483 is internally slew rate limited to reduce EMI and can meet the requirements

of RS-485 and RS-422 up to 250kbps. The SP483 is also equipped with a low power

Shutdown mode.

DESCRIPTION

SP481, SP483, SP485

Pinout (Top View)

RO 1

RE 2

DE 3

DI 4

8 V

7 B

6 A

5 GND

SP485

Top View

ABSOLUTE MAXIMUM RATINGS

These are stress ratings only and functional operation of the device at

these ratings or any other above those indicated in the operation sections

of the specifications below is not implied. Exposure to absolute maximum

rating conditions for extended periods of time may affect reliability.

VCC........................................................................................................±12V

Input Voltages

Logic........................................................-0.3V to (VCC+0.5V)

Drivers..................................................-0.3V to (VCC+0.5V)

Receivers................................................................. ±15V

Output Voltages

Logic........................................................-0.3V to (VCC+0.5V)

Drivers...................................................................... ±15V

Receivers............................................-0.3V to (VCC+0.5V)

Storage Temperature.......................................................-65˚C to +150˚C

Power Dissipation...........................................................................500mW

ELECTRICAL CHARACTERISTICS

TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS

SP481/SP483/SP485 DRIVER

DC Characteristics

Differential Output Voltage GND VCC Volts Unloaded; R = ∞;

see figure 1

Differential Output Voltage 2 VCC Volts with load; R = 50Ω; (RS422);

see figure 1

Differential Output Voltage 1.5 VCC Volts with load; R = 27Ω; (RS485);

see figure 1

Change in Magnitude of Driver

Differential Output Voltage for

Complimentary States 0.2 Volts R = 27Ωor R = 50Ω;

see figure 1

Driver Common-Mode

Output Voltage 3 Volts R = 27Ωor R = 50Ω;

see figure 1

Input High Voltage 2.0 Volts Applies to DE, DI, RE

Input Low Voltage 0.8 Volts Applies to DE, DI, RE

Input Current ±10 µA Applies to DE, DI, RE

Driver Short-Circuit Current

VOUT = HIGH 35 250 mA -7V ≤VO ≤+12V

VOUT = LOW 35 250 mA -7V ≤VO ≤+12V

SP481/SP485 DRIVER

AC Characteristics

Maximum Data Rate Mbps RE = 5V, DE = 5V

Driver Input to Output 30 60 ns tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;

see figures 3 and 6

Driver Input to Output 30 60 ns tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;

see figures 3 and 6

Driver Skew 5 10 ns

see figures 3 and 6,

tSKEW = | tDPLH - tDPHL |

Driver Rise or Fall Time 15 40 ns From 10% to 90%; RDIFF = 54Ω,

CL1 = CL2 = 100pF;

see figures 3 and 6

Driver Enable to Output High 40 70 ns CL = 100pF;

see figures 4 & 7;

S2 closed

Driver Enable to Output Low 40 70 ns CL = 100pF;

see figures 4 & 7;

S1 closed

Driver Disable Time from Low 40 70 ns CL = 15pF;

see figures 2 & 9;

S1 closed

Driver Disable Time from High 40 70 ns CL = 15pF;

see figures 2 & 9;

S2 closed

SP481/SP483/SP485 RECEIVER

DC Characteristics

Differential Input Threshold +0.2 Volts -7V ≤VCM ≤+12V

Input Hysteresis 10 mV VCM = 0V

Output Voltage High 2.4 Volts IO = -4mA,VID = +200mV

Output Voltage Low 0.4 Volts IO = +4mA,VID = -200mV

Three-State (High Impedance)

Output Current ±1 µA 0.4V ≤VO ≤2.4V; RE = 5V

Input Resistance 15 kΩ -7V ≤VCM ≤+12V

Input Current (A, B); VIN = 12V +1.0 mA DE = 0V, VCC = 0V or 5.25V, VIN = 12V

Input Current (A, B); VIN = -7V -0.8 mA DE = 0V, VCC = 0V or 5.25V, VIN = -7V

Short-Circuit Current 95 mA 0V ≤VCM ≤VCC

0.0

MECHANICAL

Operating Temperature

Commercial (_C_) 0 +70 °C

Industrial (_E_) -40 +85 °C

Storage Temperature -65 +150 °C

Package

Plastic DIP (_S)

NSOIC (_N)

ELECTRICAL CHARACTERISTICS

TMIN to TMAX and VCC = 5V ±5% unless otherwise noted.

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS

SP481/SP485 RECEIVER

AC Characteristics

Maximum Data Rate 5 Mbps RE = 0V, DE = 0V

Receiver Input to Output 60 90 200 ns tPLH; RDIFF = 54Ω,

CL1 = CL2 = 100pF;

Figures 3 & 8

Receiver Input to Output 60 90 200 ns tPHL; RDIFF = 54Ω,

CL1 = CL2= 100pF;

Figures 3 & 8

Diff. Receiver Skew ItPLH-tPHLI 13 ns RDIFF = 54Ω; CL1 = CL2 = 100pF;

Figures 3 & 8

Receiver Enable to

Output Low 20 50 ns CRL = 15pF;

Figures 2 & 9;

S1closed

Receiver Enable to

Output High 20 50 ns CRL = 15pF;

Figures 2 & 9;

S2closed

Receiver Disable from Low 20 50 ns CRL = 15pF;

Figures 2 & 9;

S1closed

Receiver Disable from High 20 50 ns CRL = 15pF;

Figures 2 & 9;

S2closed

SP481

Shutdown Timing

Time to Shutdown 50 200 600 ns RE = 5V, DE = 0V

Driver Enable from Shutdown

to Output High 40 100 ns CL= 100pF;

See figures 4 & 7;

S2closed

Driver Enable from Shutdown

to Output Low 40 100 ns CL= 100pF;

See figures 4 & 7;

S1closed

Receiver Enable from

Shutdown to Output High 300 1000 ns CL= 15pF;

See figures 2 & 9;

S2closed

Receiver Enable from

Shutdown to Output Low 300 1000 ns CL= 15pF;

See figures 2 & 9;

S1closed

POWER REQUIREMENTS

Supply Voltage +4.75 +5.25 Volts

Supply Current

SP481/485

No Load 900 µA RE, DI = 0V or VCC; DE = VCC

µA RE = 0V, DI = 0V or 5V; DE = 0V

SP483

No Load 600 µA RE, DI = 0V or VCC; DE = VCC

µA RE=0V, DI = 0V or 5V; DE = 0V

SP481/SP483

Shutdown Mode 10 µA DE = 0V, RE=VCC

ENVIRONMENTAL AND

PIN FUNCTION

Pin# Name Description

1 RO Receiver Output.

2 RE Receiver Output Enable

Active LOW.

3 DE Driver Output Enable

Active HIGH.

4 DI Driver Input.

5 GND Ground Connection.

6 A Driver Output/Receiver Input

Non-inverting.

7 B Driver Output/Receiver Input

Inverting.

8 Vcc Positive Supply 4.75V<Vcc< 5.25V.

SP481, SP483, SP485

Pinout (Top View)

RO 1

RE 2

DE 3

DI 4

8 VCC

7 B

6 A

5 GND

SP485

Top View

SP483 AC SPECIFICATIONS

TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS

SP483 DRIVER

AC Characteristics

Maximum Data Rate 250 kbps

Driver Input to Output 250 800 2000 ns tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;

see figures 3 & 6

Driver Skew 250 800 2000 ns tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;

see figures 3 & 6

Driver Rise and Fall Time 100 800 ns

see figures 3 & 6,

tSKEW = |tDPLH - tDPHL|

250 2000 ns From 10% to 90%; RDIFF = 54Ω,

CL1 = CL2 = 100pF,

see figures 3 & 6

Driver Enable to Output High 250 2000 ns CL = 100pF;

See figures 4 & 7;

S2 closed

Driver Enable to Output Low 250 2000 ns CL = 100pF;

See figures 4 & 7;

S1 closed

Driver Disable Time from Low 300 3000 ns CL = 15pF;

See figures 4 & 7;

S1 closed

Driver Disable Time from High 300 3000 ns CL = 15pF;

See figures 4 & 7;

S2 closed

SP483 RECEIVER

AC Characteristics

Maximum Data Rate 250 kbps

Receiver Input to Output 250 2000 ns tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;

Figures 3 & 8

Diff. Receiver Skew ItPLH-tPHLI100 ns RDIFF = 54Ω, CL1 = CL2 = 100pF;

Figures 3 & 8

Receiver Enable to

Output Low 20 50 ns CRL = 15pF;

Figures 2 & 9;

S1 closed

Receiver Enable to

Output High 20 50 ns CRL = 15pF;

Figures 2 & 9;

S2 closed

Receiver Disable from Low 20 50 ns CRL = 15pF;

Figures 2 & 9;

S1 closed

Receiver Disable from High 20 50 ns CRL = 15pF;

Figures 2 & 9;

S2 closed

SP483

Shutdown Timing

Time to Shutdown 50 200 600 ns RE = 5V, DE = 0V

Driver Enable from Shutdown

to Output High 2000 ns CL = 100pF;

See figures 4 & 7;

S2 closed

Driver Enable from Shutdown

to Output Low 2000 ns CL = 100pF;

See figures 4 & 7;

S1 closed

Receiver Enable from

Shutdown to Output High 2500 ns CL = 15pF;

See figures 4 & 7;

S2 closed

Receiver Enable from

Shutdown to Output Low 2500 ns CL = 15pF;

See figures 4 & 7;

S1 closed

Receivers

SP481, SP483, SP485

The SP481, SP483, and SP485 receivers have

differential inputs with an input sensitivity as

low as ±200mV. Input impedance of the receiv-

ers is typically 15kΩ (12kΩ minimum). A wide

common mode range of -7V to +12V allows for

large ground potential differences between

systems. The receivers of the SP481, SP483

and SP485 have a tri-state enable control pin.

A logic LOW on RE (pin 4) will enable the

receiver, a logic HIGH on RE (pin 4) will disable

the receiver.

The receiver for the SP481 and SP485 will

operate up to at least 5Mbps. The SP483 receiver

is rated for data rates up to 250kbps. The receiver

for each of the three devices is equipped with the

fail-safe feature. Fail-safe guarantees that the

receiver output will be in a HIGH state when the

input is left unconnected and floating.

Shutdown Mode

SP481/SP483

The SP481 and SP483 are equipped with a

Shutdown mode. To enable the Shutdown state,

both the driver and receiver must be disabled

simultaneously. A logic LOW on DE (pin 5) and

a logic HIGH on RE (pin 4) will put the SP481

or SP483 into Shutdown mode. In Shutdown,

supply current will drop to typically 1µA.

DESCRIPTION

SP481, SP483, SP485

The SP481, SP483, and SP485 are half-duplex

differential transceivers that meet the require-

ments of RS-485 and RS-422. Fabricated with a

Sipex proprietary BiCMOS process, all three

products require a fraction of the power of older

bipolar designs.

The RS-485 standard is ideal for multi-drop

applications and for long-distance interfaces.

RS-485 allows up to 32 drivers and 32 receivers

to be connected to a data bus, making it an ideal

choice for multi-drop applications. Since the

cabling can be as long as 4,000 feet, RS-485

transceivers are equipped with a wide (-7V to

+12V) common mode range to accommodate

ground potential differences. Because RS-485 is

a differential interface, data is virtually immune

to noise in the transmission line.

Drivers

SP481, SP483, SP485

The driver outputs of the SP481, SP483, and

SP485 are differential outputs meeting the RS-

485 and RS-422 standards. The typical voltage

output swing with no load will be 0 volts to +5

volts. With worst case loading of 54Ω across the

differential outputs, the drivers can maintain

greater than 1.5V voltage levels. The drivers of

the SP481, SP483 and SP485 have an enable

control line which is active HIGH. A logic

HIGH on DE (pin 5) will enable the differential

driver outputs. A logic LOW on DE (pin 5) will

tri-state the driver outputs.

The transmitters of the SP481 and SP485 will

operate up to at least 5Mbps. The SP483 has

internally slew rate limited driver outputs to

minimize EMI. The maximum data rate for the

SP483 driver is 250kbps.

Figure 6. Driver Propagation Delays

Figure 1. Driver DC Test Load Circuit Figure 2. Receiver Timing Test Load Circuit

Figure 3. Driver/Receiver Timing Test Circuit Figure 4. Driver Timing Test Load #2 Circuit

1KTest Point

Receiver

Output

DIFF

15pF S

500

Output

Under

Tes t

INPUTS OUTPUTS

LINE

RE DE DI CONDITION B A

X 1 1 No Fault 0 1

X 1 0 No Fault 1 0

X 0 X X Z Z

X 1 X Fault Z Z

INPUTS OUTPUTS

RE DE A - B R

0 0 +0.2V 1

0 0 -0.2V 0

0 0 Inputs Open 1

1 0 X Z

Table 1. Transmit Function Truth Table

Table 2. Receive Function Truth Table

+3V

DRIVER

OUTPUT

DIFFERENTIAL

OUTPUT

– V

–

1.5V 1.5V

PLH

1/2V

PHL

DPLH

DPHL

SKEW =

DPLH -

DPHL

SP481/485

1MHz; f

SP483

100kHz

; t

< 10ns; t

< 10ns

+3V

VOL

A, B

1.5V 1.5V

tZL

tZH

VOH

A, B 2.3V

2.3V

tLZ

tHZ

0.5V

Output normally LOW

Output normally HIGH

fSP481/485 = 1MHz; fSP483 = 100kHz; tR< 10ns; tF < 10ns

+3V

1.5V 1.5V

tZL

tZH

R 1.5V

1.5V

tLZ

tHZ

0.5V

Output normally LOW

Output normally HIGH

VIL

VIH

fSP481/485= 1MHz; fSP483 = 100kHz; tR< 10ns; tF < 10ns

Figure 9. Receiver Enable and Disable Times

Figure 8. Receiver Propagation Delays

Figure 7. Driver Enable and Disable Times

VOH

VOL

R1.5V 1.5V

tPHL

fSP481/485= 1MHz; fSP483 = 100kHz; tR< 10ns; tF < 10ns

OUTPUT

V0D2+

V0D2–

A – B 0V 0V

tPLH

INPUT

tSKEW = | tPHL - tPLH |

A A1

SIDE VIEW

Seating Plane

SECTION B-B

WITH PLATING

SYMBOL MIN NOM MAX

A 1.35 - 1.75

A1 0.1 - 0.25

A2 1.25 - 1.65

b 0.31 - 0.51

c 0.17 - 0.24

L 0.4 - 1.27

ø 0º - 8º

ø1 5º - 15º

Note: Dimensions in (mm)

8 Pin NSOIC JEDEC MO-012 (AA) Variation

4.90 BSC

6.00 BSC

3.90 BSC

1.27 BSC

1.04 REF

0.25 BSC

Gauge Plane

Ø1

Seating Plane

VIEW C

TOP VIEW

SEE VIEW C

E/2

INDEX AREA

(D/2 X E1/2)

E1/2

BASE METAL

PACKAGE: 8 PIN NSOIC

PACKAGE: 8 PIN PDIP

INDEX

AREA

1 2 3 N/2

SYMBOL MIN NOM MAX

A - - 0.21

A1 0.15 - -

A2 0.115 0.13 0.195

b 0.014 0.018 0.022

b2 0.045 0.06 0.07

b3 0.3 0.039 0.045

c 0.008 0.01 0.014

D 0.355 0.365 0.4

D1 0.005 - -

E 0.3 0.31 0.325

E1 0.24 0.25 0.28

eB - - 0.43

L 0.115 0.13 0.15

Note: Dimensions in (mm)

.100 BSC

.300 BSC

8 PIN PDIP JEDEC MS-001 (BA) Variation

ORDERING INFORMATION

Model Temperature Range Package

SP481CN .............EOL, recommended upgrade SP481E............ 0˚C to +70˚C ............................................................................... 8-pin NSOIC

SP481CN/TR .......EOL, recommended upgrade SP481E............ 0˚C to +70˚C ............... ......................... ................................ 8-pin NSOIC

SP481CS .............EOL, recommended upgrade SP481E............ 0˚C to +70˚C ............................................................................. 8-pin PDIP

SP481EN .............EOL, recommended upgrade SP481E.......... .-40˚C to +85˚C ........................................................................... 8-pin NSOIC

SP481EN/TR ........EOL, recommended upgrade SP481E...........-40˚C to +85˚C .......................................................................... 8-pin NSOIC

SP481ES ..............EOL, recommended upgrade SP481E............ -40˚C to +85˚C ......................................................................... 8-pin PDIP

SP483CN ...................................................................................... 0˚C to +70˚C ............................................................................... 8-pin NSOIC

SP483CN/TR ................................................................................ 0˚C to +70˚C ............................................................................... 8-pin NSOIC

SP483CS ...................................................................................... 0˚C to +70˚C ................................................................................ 8-pin PDIP

SP483EN ..................................................................................... -40˚C to +85˚C ............................................................................. 8-pin NSOIC

SP483EN/TR ............................................................................... -40˚C to +85˚C ............................................................................. 8-pin NSOIC

SP483ES ..................................................................................... -40˚C to +85˚C .............................................................................. 8-pin PDIP

SP485CN ...................................................................................... 0˚C to +70˚C ............................................................................... 8-pin NSOIC

SP485CN/TR ................................................................................ 0˚C to +70˚C ............................................................................... 8-pin NSOIC

SP485CS ...................................................................................... 0˚C to +70˚C ................................................................................ 8-pin PDIP

SP485EN ..................................................................................... -40˚C to +85˚C ............................................................................. 8-pin NSOIC

SP485EN/TR ............................................................................... -40˚C to +85˚C ............................................................................. 8-pin NSOIC

SP485ES ..................................................................................... -40˚C to +85˚C .............................................................................. 8-pin PDIP

Corporation

ANALOG EXCELLENCE

Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the

application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.

Sipex Corporation

Headquarters and

Sales Office

233 South Hillview Drive

Milpitas, CA 95035

TEL: (408) 934-7500

FAX: (408) 935-7600

e-mail: sales@sipex.com

For lead-free packages, improved ESD protection and performance: upgrade to SP485E, SP481E, SP483E

Example: SP485EN/TR = upgrade to SP485EEN-L/TR

/TR = Tape and Reel

Pack quantity is 2,500 for NSOIC.

CLICK HERE TO ORDER SAMPLES

www.s-manuals.com

SP481, SP483, SP485 Datasheet. Www.s Manuals.com. 20040728 Sipex

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