SN75ALS171, SN75ALS171A

TRIPLE DIFFERENTIAL BUS TRANSCEIVERS

SLLS056D – AUGUST 1987 – REVISED SEPTEMBER 1995

1

POST OFFICE BOX 655303

of ANSI EIA/TIA-422-B and RS-485 and ITU

Recommendation V.11

Transfers per Second (FAST-20 SCSI)

Circuitry

Long Bus Lines in Noisy Environments

Combined Receiver Enables

Bus Voltages Ranges

Limiting

Protection

description

The SN75ALS171 and the SN75ALS171A triple differential bus transceivers are monolithic integrated circuits

designed for bidirectional data communication on multipoint bus transmission lines. They are designed for

balanced transmission lines, and each driver meets ANSI Standards EIA/TIA-422-B and RS-485 and both the

drivers and receivers meet ITU Recommendation V.11. The SN75ALS171A is designed for FAST-20 SCSI and

can transmit or receive data pulses as short as 30 ns with a maximum skew of 5 ns.

The SN75ALS171 and the SN75ALS171A operate from a single 5-V power supply. The drivers and receivers

have individual active-high and active-low enables, respectively, which can be externally connected together

to function as a direction control. The driver differential output and the receiver differential input pairs are

connected internally to form differential input/output (I/O) bus ports that are designed to offer minimum loading

common-mode voltage ranges making the device suitable for party-line applications.

The SN75ALS171 and the SN75ALS171A are characterized for operation from 0

°C to 70°C.

Copyright

© 1995, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

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

DW OR J PACKAGE

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1R

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