DS7820A National Semiconductor, DS7820A Datasheet

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DS7820A

Manufacturer Part Number
DS7820A
Description
Dual Line Receiver
Manufacturer
National Semiconductor
Datasheet

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© 1999 National Semiconductor Corporation
DS7820A/DS8820A
Dual Line Receiver
General Description
The DS7820A and the DS8820A are improved performance
digital line receivers with two completely independent units
fabricated on a single silicon chip. Intended for use with digi-
tal systems connected by twisted pair lines, they have a dif-
ferential input designed to reject large common mode sig-
nals while responding to small differential signals. The output
is directly compatible with TTL or LS integrated circuits.
The response time can be controlled with an external capaci-
tor to reject input noise spikes. The output state is a logic “1”
for both inputs open. Termination resistors for the twisted
pair line are also included in the circuit. Both the DS7820A
and the DS8820A are specified, worst case, over their full
Connection Diagram
Note 1: Pin 7 connected to bottom of cavity package.
Order Number DS7820AJ or DS8820AN See NS Package Number J14A or N14A
For Complete Military 883 Specificatons, See RETS Data Sheet.
DS005797
See NS Package Number J14A or W14B
Order Number DS7820AJ/883
Dual-in-Line Package
Top View
operating temperature range (−55˚C to +125˚C and 0˚C to
70˚C respectively), over the entire input voltage range, for
Features
n Operation from a single +5V logic supply
n Input voltage range of
n Strobe low forces output to “1” state
n High input resistance
n Fanout of ten with TTL integrated circuits
n Outputs can be wire OR’ed
n Series 54/74 compatible
±
10% supply voltage variations.
DS005797-2
±
15V
www.national.com
May 1999

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DS7820A Summary of contents

Page 1

... DS8820A are specified, worst case, over their full Connection Diagram Note 1: Pin 7 connected to bottom of cavity package. Order Number DS7820AJ or DS8820AN See NS Package Number J14A or N14A For Complete Military 883 Specificatons, See RETS Data Sheet. © 1999 National Semiconductor Corporation DS005797 operating temperature range (− ...

Page 2

... OUT OUT DIFF = 5.5V STROBE DIFF = 0.4V −3V V STROBE DIFF = 0V 5.5V STROBE 5.5V, −15V V 15V and −55˚C T +125˚C for the DS7820A or 4.75V 5.0V 25˚C and unless stated differently 260˚C Min Max Units ) CC 4.5 5.5 V 4.75 5.25 V −55 +125 ˚ ...

Page 3

Switching Characteristics = 25˚ 5V, unless otherwise noted Symbol Parameter t Propagation Delay, Differential pd0 Input to “0” Output t Propagation Delay, Differential pd1 Input to “1” Output t Propagation Delay, Strobe pd0 Input to ...

Page 4

Typical Performance Characteristics Supply Voltage Sensitivity DS005797-6 Transfer Function DS005797-11 Power Supply Current DS005797-14 Differential Input Delays DS005797-17 www.national.com Common-Mode Voltage Sensitivity DS005797-9 Termination Resistance DS005797-12 Internal Power Dissipation DS005797-15 Strobe Delays DS005797-18 4 Temperature Sensitivity DS005797-10 Input Characteristics DS005797-13 ...

Page 5

Schematic Diagram Note 8: Schematic shows one-half of unit. Typical Applications Note 9: Optional to control response time. Single Ended (EIA-RS232C) Receiver with Hysteresis Differential Line Driver and Receiver 5 DS005797-1 DS005797-3 www.national.com ...

Page 6

Typical Applications (Continued) www.national.com (Output = “1” for Open Input) DS005797-4 6 DS005797-5 ...

Page 7

... Physical Dimensions inches (millimeters) unless otherwise noted Order Number DS7820AJ or DS7820AJ/883 Ceramic Dual-In-Line Package (J) NS Package Number J14A 7 www.national.com ...

Page 8

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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