SN75ALS170, SN75ALS170A

TRIPLE DIFFERENTIAL BUS TRANSCEIVER

SLLS055D – AUGUST 1987 – REVISED SEPTEMBER 1995

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POST OFFICE BOX 655303

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

Bus Voltage Ranges

Limiting

Protection

Each Channel

description

The SN75ALS170 and SN75ALS170A triple differential bus transceivers are monolithic integrated circuits

designed for bidirectional data communication on multipoint bus transmission lines. It is designed for balanced

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

receiver meet ITU Recommendation V.11. The SN75ALS170A 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 SN75ALS170 and SN75ALS170A operate from a single 5-V power supply. The drivers and receivers have

active-high and active-low enables, respectively, which are internally connected together to function as a

direction control. The driver differential outputs and the receiver differential inputs are connected internally to

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

making the device suitable for party-line applications.

The SN75ALS170 and the SN75ALS170A are characterized for operation from 0

°C to 70°C.

AVAILABLE OPTIONS

SKEW LIMIT

PART NUMBER

10 ns

SN75ALS170DW

SN75ALS170J

5 ns

SN75ALS170ADW

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.

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1D

1DIR

NC

GND

NC

2D

2DIR

NC

3D

3DIR

1B

1A

NC

NC

2B

2A

3B

3A

NC

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1D

1DIR

GND

2D

2DIR

3D

3DIR

1B

1A

2B

2A

3B

3A

NC – No internal connection

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