DC89C386 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – Twelve Channel CMOS Differential Line Receiver

October 2001
DS89C386
Twelve Channel CMOS Differential Line Receiver
General Description
The DS89C386 is a high speed twelve channel CMOS dif-
ferential receiver that meets the requirements of TIA/EIA-
422-B. The DS89C386 features low power dissipation of 240
mW typical.
Each TRI-STATE^® enable, EN, allows the receiver output to
be active or in a Hi-impedance off state. Each enable is
common to only two receivers for flexibility and multiplexing
of receiver outputs.
The receiver output (RO) is guaranteed to be High when the
inputs are left open and unterminated. The receiver can
detect signals as low and including ±200 mV over the com-
mon mode range of ±7V. The receiver outputs (RO) are
compatible 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 High Output Drive Capability: ±6 mA
n Available in SSOP packaging:
— Requires 30% less PCB space than 3 DS34C86TMs
Connection Diagram
48L SSOP
DS89C386
Function Diagram
1/6 of package
01208502
Truth Table
Enable
Inputs
EN
RI–RI*
L
X
H
≥200 mV or OPEN†
H
≤ −200 mV
H
+200 mV > and > −200 mV
†Not terminated.
Output
RO
Z
H
L
X
01208501
Order Number DS89C386TMEA
See NS Package Number MS48A
TRI-STATE^® is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS012085
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