DS89C386

Twelve Channel CMOS Differential Line Receiver

General Description

The DS89C386 is a high speed twelve channel CMOS differ-

ential receiver that meets the requirements of TIA/

EIA-422-B. The DS89C386 features low power dissipation of

240 mW typical.

be active or in a Hi-impedance off state. Each enable is com-

mon to only two receivers for flexibility and multiplexing of re-

ceiver outputs.

The receiver output (RO) is guaranteed to be High when the

inputs are left open and unterminated. The receiver can de-

ible with both TTL and CMOS levels.

Features

n Low power design — 240 mW typical

n Meets TIA/EIA-422-B (RS-422)

n Receiver OPEN input failsafe feature

n Guaranteed AC parameters:

— Maximum receiver skew −4 ns

— Maximum transition time −9 ns

n Available in SSOP packaging:

— Requires 30% less PCB space than 3 DS34C86TMs

Connection Diagram

Function Diagram

Truth Table

Enable

Inputs

Output

EN

RO

LX

Z

H

H

H

≤ −200 mV

L

H

X

48L SSOP

DS89C386

DS012085-1

Order Number DS89C386TMEA

See NS Package Number MS48A

DS012085-2

1/6 of package

May 1995

© 1998 National Semiconductor Corporation

DS012085

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