SN75ALS191
DUAL DIFFERENTIAL LINE DRIVER
SLLS032B − DECEMBER 1987 − REVISED MAY 1995
D OR P PACKAGE
(TOP VIEW)
D
Meets or Exceeds the Requirements of
ANSI Standard EIA/TIA-422-B and ITU
Recommendation V.11
VCC
1A
1Y
1Z
2Y
2Z
1
2
3
4
8
7
6
5
D
D
D
D
D
Designed to Operate at 20 Mbaud or Higher
TTL-and CMOS-Input Compatibility
Single 5-V Supply Operation
2A
GND
Output Short-Circuit Protection
Improved Replacement for the μA9638
description
The SN75ALS191 is a dual, high-speed, differential line driver designed to meet ANSI Standard EIA/TIA-422-B
and ITU Recommendation V.11. The inputs are TTL- and CMOS-compatible and have input clamp diodes.
Schottky-diode-clamped transistors minimize propagation delay time. This device operates from a single 5-V
power supply and is supplied in eight-pin packages.
The SN75ALS191 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each driver)
OUTPUTS
INPUTS
A
Y
H
L
Z
H
L
L
H
H = high level, L = low level,
Z = high impedance
logic symbol†
logic diagram (positive logic)
8
7
1Y
1Z
8
7
6
5
2
1Y
1Z
2Y
2Z
2
1A
2A
1A
6
5
3
2Y
2Z
2A
3
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
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.
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.
1
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