Data Sheet
SN65ALS176, SN75ALS176, SN75ALS176A, SN75ALS176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS040H – AUGUST 1987 – REVISED JUNE 2000
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Meet or Exceed the Requirements of
TIA/EIA-422-B, TIA/EIA-485-A
†
and ITU
Recommendations V.11 and X.27
Operate at Data Rates up to 35 Mbaud
Four Skew Limits Available:
SN65ALS176 . . . 15 ns
SN75ALS176 . . . 10 ns
SN75ALS176A . . . 7.5 ns
SN75ALS176B ...5 ns
Designed for Multipoint Transmission on
Long Bus Lines in Noisy Environments
Low Supply-Current Requirements
. . . 30 mA Max
Wide Positive and Negative Input/Output
Bus-Voltage Ranges
Thermal Shutdown Protection
Driver Positive and Negative Current
Limiting
Receiver Input Hysteresis
Glitch-Free Power-Up and Power-Down
Protection
Receiver Open-Circuit Fail-Safe Design
description
The SN65ALS176 and SN75ALS176 series differential bus transceivers are designed for bidirectional data
communication on multipoint bus transmission lines. They are designed for balanced transmission lines and
meet TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendations V.11 and X.27.
The SN65ALS176 and SN75ALS176 series combine a 3-state, differential line driver and a differential input line
receiver, both of which operate from a single 5-V power supply. The driver and receiver have active-high and
active-low enables, respectively, that can be connected together externally to function as a direction control.
The driver differential outputs and the receiver differential inputs are connected internally to form a differential
input/output (I/O) bus port that is designed to offer minimum loading to the bus when the driver is disabled or
V
CC
= 0. This port features wide positive and negative common-mode voltage ranges, making the device
suitable for party-line applications.
The SN65ALS176 is characterized for operation from –40°C to 85°C. The SN75ALS176 series is characterized
for operation from 0°C to 70°C.
Copyright 2000, 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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R
RE
DE
D
V
CC
B
A
GND
D OR P PACKAGE
(TOP VIEW)
†
These devices meet or exceed the requirements of TIA/EIA-485-A, except for the Generator Contention Test (para. 3.4.2) and the Generator
Current Limit (para. 3.4.3). The applied test voltage ranges are –6 V to 8 V for the SN75ALS176, SN75ALS176A, and SN75ALS176B and
–4 V to 8 V for the SN65ALS180.