Meets EIA Standards RS-422-A, RS-423-A,
RS-485, and CCITT V.11
Designed to Operate With Pulse Durations
as Short as 20 ns
Designed for Multipoint Bus Transmission
on Long Bus Lines in Noisy Environments
Input Sensitivity . . . ±200 mV
Low-Power Consumption . . . 20 mA Max
Open-Circuit Fail-Safe Design
Pin Compatible With SN75173 and
AM26LS32

description
The SN55LBC173 is a monolithic quadruple
differential line receiver with 3-state outputs
designed to meet the requirements of the EIA
standards RS-422-A, RS-423-A, RS-485, and
CCITT V.11. This device is optimized for balanced
multipoint bus transmission at data rates up to and
exceeding 10 million bits per second. The four
receivers share two ORed enable inputs, one
active when high, the other active when low. Each
receiver features high input impedance, input
hysteresis for increased noise immunity, and input
sensitivity of ±200 mV over a common-mode input
voltage range of 12 V to –7 V. Fail-safe design
ensures that if the inputs are open circuited, the
output is always high. The SN55LBC173 is
designed using the Texas Instruments proprietary
LinBiCMOSEtechnology that provides low power
consumption, high switching speeds, and
robustness.
This device offers optimum performance when used with the SN55LBC172M quadruple line driver. The
SN55LBC173 is available in the 16-pin CDIP (J), the 16-pin CPAK (W), or the 20-pin LCCC (FK) packages.
The SN55LBC173 is characterized over the military temperature range of –55°C to 125°C.