DS89C386 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – Twelve Channel CMOS Differential Line Receiver

May 1995
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.
Each TRI-STATE^® enable, EN, allows the receiver output to
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-
tect signals as low and including ±200 mV over the common
mode range of ±7V. The receiver outputs (RO) are compat-
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 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
Truth Table
DS012085-2
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
DS012085-1
Order Number DS89C386TMEA
See NS Package Number MS48A
TRI-STATE^® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS012085
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