1 Features
• Meets or exceeds the requirements of ANSI
standard EIA/TIA-422-B and ITU recommendation
V.11
• Designed to operate at 20 Mbaud or higher
• TTL-and CMOS-input compatibility
• Single 5V supply operation
• Output short-circuit protection
• Improved replacement for the μA9638

2 Applications
• Factory automation
• ATM and cash counters
• Smart grid
• AC and servo motor drives

3 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 5V power supply and is supplied in eight-pin
packages.
The SN75ALS191 is characterized for operation from
0°C to 70°C.