Datasheet Texas Instruments DS78LS120QML — 数据表

DS78LS120 is OBSOLETE DS78LS120QML, DS78LS120
www.ti.com SNLS370C – SEPTEMBER 1999 – REVISED APRIL 2013 DS78LS120/DS78LS120QML Dual Differential Line Receiver (Noise Filtering and Fail-Safe)
Check for Samples: DS78LS120QML, DS78LS120 FEATURES DESCRIPTION The DS78LS120QML is a high performance, dual
differential, TTL compatible line receiver for both
balanced and unbalanced digital data transmission.
The inputs are compatible with EIA, Federal and MIL
standards. 1 2 Meets EIA Standards RS232-C, RS422 and
RS423, Federal Standards 1020, 1030 and MIL188-114
Input Voltage Range of В±15V (Differential or
Common-mode)
Separate Strobe Input for Each Receiver
5k Typical Input Impedance
Optional 180О© Termination Resistor
50mV Input Hysteresis
200mV Input Threshold
Separate Fail-safe Mode The line receiver will discriminate a В±200 mV input
signal over a common-mode range of В±10V and a
В±300 mV signal over a range of В±15V.
Circuit features include hysteresis and response
control for applications where controlled rise and fall
times and/or high frequency noise rejection are
desirable. Threshold offset control is provided for failsafe detection, should the input be open or short.
Each receiver includes an optional 180О© terminating …