DS7820 DS8820 Dual Line Receiver
February 1996
DS7820 DS8820 Dual Line Receiver
General Description
The DS7820 specified from
b
55 C to
a
125 C and the
DS8820 specified from 0 C to
a
70 C are digital line re-
ceivers with two completely independent units fabricated on
a single silicon chip Intended for use with digital systems
connected by twisted pair lines they have a differential in-
put designed to reject large common mode signals while
responding to small differential signals The output is direct-
ly compatible with TTL or LS integrated circuits
The response time can be controlled with an external ca-
pacitor to eliminate noise spikes and the output state is
determined for open inputs Termination resistors for the
twisted pair line are also included in the circuit Both the
DS7820 and the DS8820 are specified worst case over
their full operating temperature range for
g
10-percent sup-
ply voltage variations and over the entire input voltage
range
Features
Y
Y
Y
Y
Y
Y
Operation from a single
a
5V logic supply
Input voltage range of
g
15V
Each channel can be strobed independently
High input resistance
Fan out of two with TTL integrated circuits
Strobe low forces output to 鈥樷€?鈥欌€?state
Connection Diagram
Dual-In-Line Package
TL F 5796 鈥?2
Top View
Order Number DS7820J or DS8820N
See NS Package Number J14A or N14A
For Complete Military 883 Specifications See RETS Data Sheet
Order Number DS7820J 883 or DS7820W 883
See NS Package Number J14A or W14B
C
1996 National Semiconductor Corporation
TL F 5796
RRD-B30M36 Printed in U S A
http
www national com
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