DS8922, DS8922A, DS8923A

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SNLS373B – JUNE 1998 – REVISED APRIL 2013

DS8922/DS8922A/DS8923A TRI-STATE RS-422 Dual Differential Line Driver and Receiver

Pairs

Check for Samples: DS8922, DS8922A, DS8923A

1

FEATURES

DESCRIPTION

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•

12 ns Typical Propagation Delay

The DS8922/22A and DS8923A are Dual Differential

•

Output Skew—±0.5 ns Typical

Line Driver and Receiver pairs. These devices are

•

Meets the Requirements of EIA Standard RS-

designed specifically for applications meeting the

422

ST506, ST412 and ESDI Disk Drive Standards. In

addition, the devices meet the requirements of the

•

Complementary Driver Outputs

EIA Standard RS-422.

•

High Differential or Common-Mode Input

These devices offer an input sensitivity of 200 mV

Voltage Ranges of ±7V

over

a

±7V

common

mode

operating

range.

•

±0.2V Receiver Sensitivity over the Input

Hysteresis is incorporated (typically 70 mV) to

Voltage Range

improve noise margin for slowly changing input

•

Receiver Input Fail-Safe Circuitry

waveforms. An input fail-safe circuit is provided such

that if the receiver inputs are open the output

•

Receiver Input Hysteresis—70 mV typical

assumes the logical one state.

•

Glitch Free Power Up/Down

The DS8922A and DS8923A drivers are designed to

•

TRI-STATE Outputs

provide unipolar differential drive to twisted pair or

parallel

wire

transmission

lines.

Complementary

outputs are logically ANDed and provide an output

skew of 0.5 ns (typ.) with propagation delays of 12

ns.

Both

devices

feature

TRI-STATE

outputs.

The

DS8922/22A have independent control functions

common to a driver and receiver pair. The DS8923A

has separate driver and receiver control functions.

Power up/down circuitry is featured which will TRI-

STATE the outputs and prevent erroneous glitches on

the transmission lines during system power up or

power down operation.

The DS8922/22A and DS8923A are designed to be

compatible with TTL and CMOS.

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 1998–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.