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.