DS78C20J National Semiconductor, DS78C20J Datasheet

IC LINE RX DUAL RS422/423 14CDIP

DS78C20J

Manufacturer Part Number
DS78C20J
Description
IC LINE RX DUAL RS422/423 14CDIP
Manufacturer
National Semiconductor
Type
Line Receiverr
Datasheet

Specifications of DS78C20J

Number Of Drivers/receivers
2/0
Protocol
RS232, RS422, RS423
Voltage - Supply
4.5 V ~ 15 V
Mounting Type
Through Hole
Package / Case
*
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*DS78C20J

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© 1998 National Semiconductor Corporation
DS78C20/DS88C20
Dual CMOS Compatible Differential Line Receiver
General Description
The DS78C20 and DS88C20 are high performance, dual dif-
ferential, CMOS compatible line receivers for both balanced
and unbalanced digital data transmission. The inputs are
compatible with EIA and Federal Standards.
Input specifications meet or exceed those of the popular
DS7820/DS8820 line receiver, and the pinout is identical.
A response pin is provided for controlling sensitivity to input
noise spikes with an external capacitor. Each receiver in-
cludes a 180
tionally on twisted pair lines. The DS78C20 is specified over
a −55˚C to +125˚C operating temperature range, and the
DS88C20 over a 0˚C to +70˚C range.
Connection Diagram
terminating resistor, which may be used op-
For Complete Military Product Specifications,
DS005798
refer to the appropriate SMD or MDS.
See NS Package Numbers N14A
See NS Package Number J14A
Order Number DS78C20J/883
Order Number DS88C20N
Dual-In-Line Package
Top View
Features
n Meets requirements of EIA Standards RS-232-C RS-422
n Input voltage range of
n Separate strobe input for each receiver
n
n 5k typical input impedance
n 50 mV input hysteresis
n 200 mV input threshold
n Operation voltage range = 4.5V to 15V
n DS7830/DS8830 recommended driver
and RS-423, and Federal Standards 1020 and 1030
common-mode)
1
2
V
CC
strobe threshold for CMOS compatibility
DS005798-1
±
15V (differential or
www.national.com
May 1998

Related parts for DS78C20J

DS78C20J Summary of contents

Page 1

... Operation voltage range = 4.5V to 15V n DS7830/DS8830 recommended driver Dual-In-Line Package DS005798-1 Top View Order Number DS88C20N See NS Package Numbers N14A refer to the appropriate SMD or MDS. Order Number DS78C20J/883 See NS Package Number J14A May 1998 ± 15V (differential or www.national.com ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Common-Mode Voltage Differential Input Voltage Strobe Voltage Output Sink Current Maximum Power Dissipation (Note 1) at 25˚C Cavity Package Molded Package ...

Page 3

Switching Characteristics = 5V 25˚ Symbol Parameter t Differential Input to “0” Output pd0(D) t Differential Input to “1” Output pd1(D) t Strobe Input to “0” Output pd0(S) t Strobe Input to “1” Output pd1(S) ...

Page 4

Typical Applications (Continued) AC Test Circuit = PRR = 1 MHz Note 10: Includes probe and jig capacitance Switching Time Waveforms www.national.com ± 4,3 k 10V 15 k ...

Page 5

... Physical Dimensions inches (millimeters) unless otherwise noted Ceramic Dual-In-Line Package (J) Order Number DS78C20J/883 NS Package Number J14A Molded Dual-In-Line Package (N) Order Number DS88C20N NS Package Number N14A 5 www.national.com ...

Page 6

... National Semiconductor Asia Pacific Customer Fax: +49 (0) 1 80-530 85 86 Response Group Email: europe.support@nsc.com Tel: 65-2544466 Fax: 65-2504466 Tel: +49 (0) 1 80-532 78 32 Email: sea.support@nsc.com Tel: +49 (0) 1 80-534 16 80 National Semiconductor Japan Ltd. Tel: 81-3-5620-6175 Fax: 81-3-5620-6179 ...

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