DS3486

Quad RS-422, RS-423 Line Receiver

General Description

National’s quad RS-422, RS-423 receiver features four inde-

pendent receivers which comply with EIA Standards for the

electrical characteristics of balanced/unbalanced voltage

digital interface circuits. Receiver outputs are 74LS compat-

pedance state when the appropriate output control pin

reaches a logic zero condition. A PNP device buffers each

output control pin to assure minimum loading for either logic

one or logic zero inputs. In addition, each receiver has inter-

nal hysteresis circuitry to improve noise margin and discour-

age output instability for slowly changing input waveforms.

Features

n Four independent receivers

n TRI-STATE outputs

n Internal hysteresis −140 mV (typ)

n Fast propagation times −19 ns (typ)

n TTL compatible outputs

n 5V supply

n Pin compatible and interchangeable with MC3486

Block and Connection Diagrams

DS005779-1

Dual-In-Line Package

DS005779-2

Top View

Order Number DS3486M or DS3486N

See NS Package Number M16A or N16E

May 1998

© 1999 National Semiconductor Corporation

DS005779

www.national.com