DS78C20 Datasheet, PDF (1/6 Pages) National Semiconductor (TI) – Dual CMOS Compatible Differential Line Receiver

May 1998
DS78C20/DS88C20
Dual CMOS Compatible Differential Line Receiver
General Description
The DS78C20 and DS88C20 are high performance, dual dif-
ferential, CMOS compatible line receivers for both balanced
and unbalanced digital data transmission. The inputs are
compatible with EIA and Federal Standards.
Input specifications meet or exceed those of the popular
DS7820/DS8820 line receiver, and the pinout is identical.
A response pin is provided for controlling sensitivity to input
noise spikes with an external capacitor. Each receiver in-
cludes a 180Ω terminating resistor, which may be used op-
tionally on twisted pair lines. The DS78C20 is specified over
a −55˚C to +125˚C operating temperature range, and the
DS88C20 over a 0˚C to +70˚C range.
Features
n Meets requirements of EIA Standards RS-232-C RS-422
and RS-423, and Federal Standards 1020 and 1030
n Input voltage range of ±15V (differential or
common-mode)
n Separate strobe input for each receiver
n ¹â„2 V_CC strobe threshold for CMOS compatibility
n 5k typical input impedance
n 50 mV input hysteresis
n 200 mV input threshold
n Operation voltage range = 4.5V to 15V
n DS7830/DS8830 recommended driver
Connection Diagram
Dual-In-Line Package
DS005798-1
Top View
Order Number DS88C20N
See NS Package Numbers N14A
For Complete Military Product Specifications,
refer to the appropriate SMD or MDS.
Order Number DS78C20J/883
See NS Package Number J14A
© 1998 National Semiconductor Corporation DS005798
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