DS89C386 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
廬
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
鹵
200 mV over the common
mode range of
鹵
7V. The receiver outputs (RO) are compat-
ible with both TTL and CMOS levels.
Features
Low power design 鈥?240 mW typical
Meets TIA/EIA-422-B (RS-422)
Receiver OPEN input failsafe feature
Guaranteed AC parameters:
鈥?Maximum receiver skew 鈭? ns
鈥?Maximum transition time 鈭? ns
n
High Output Drive Capability:
鹵
6 mA
n
Available in SSOP packaging:
鈥?Requires 30% less PCB space than 3 DS34C86TMs
n
n
n
n
Connection Diagram
48L SSOP
DS89C386
Function Diagram
DS012085-2
1/6 of package
Truth Table
Enable
EN
L
H
H
H
鈥?/div>
Not terminated.
Inputs
RI鈥揜I
*
X
鈮?00
mV or OPEN
鈥?/div>
鈮?/div>
鈭?00 mV
+200 mV
>
and
>
鈭?00 mV
Output
RO
Z
H
L
X
DS012085-1
Order Number DS89C386TMEA
See NS Package Number MS48A
TRI-STATE
廬
is a registered trademark of National Semiconductor Corporation.
漏 1998 National Semiconductor Corporation
DS012085
www.national.com
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