ds8838 National Semiconductor Corporation, ds8838 Datasheet

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ds8838

Manufacturer Part Number
ds8838
Description
Quad Unified Bus Transceiver
Manufacturer
National Semiconductor Corporation
Datasheet

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© 1999 National Semiconductor Corporation
DS8838
Quad Unified Bus Transceiver
General Description
The DS8838 is a quad high speed driver/receiver designed
for use in bus organized data transmission systems intercon-
nected by terminated 120
termination is intended to be 180
the +5V logic supply together with a 390
bus to ground. The bus can be terminated at one or both
ends. Low bus pin current allows up to 27 driver/receiver
pairs to utilize a common bus. The bus loading is unchanged
when V
greatly enhance bus noise immunity. One two-input NOR
gate is included to disable all drivers in a package simulta-
neously. Receiver performance is optimized for systems with
bus rise and fall times
Typical Application
CC
= 0V. The receivers incorporate hysteresis to
1.0 µs/V.
impedance lines. The external
resistor from the bus to
DS005812
resistor from the
Features
n 4 totally separate driver/receiver pairs per package
n 1V typical receiver input hysteresis
n Receiver hysteresis independent of receiver output load
n Guaranteed minimum bus noise immunity of 1.3V, 2V
n Temperature-insensitive receiver thresholds track bus
n 20 µA typical bus terminal current with normal V
n Open collector driver output allows wire-OR connection
n High speed
n Series 74 TTL compatible driver and disable inputs and
typ.
logic levels
with V
receiver outputs
CC
= 0V
www.national.com
DS005812-1
May 1999
CC
or

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ds8838 Summary of contents

Page 1

... DS8838 Quad Unified Bus Transceiver General Description The DS8838 is a quad high speed driver/receiver designed for use in bus organized data transmission systems intercon- nected by terminated 120 impedance lines. The external termination is intended to be 180 resistor from the bus to the +5V logic supply together with a 390 bus to ground ...

Page 2

... Connection Diagram Order Number DS7838J, DS8838M or DS8838N See NS Package Number J16A, M16A or N16A www.national.com Dual-In-Line Package DS005812-2 Top View 2 ...

Page 3

... The table of “Electrical Characteristics” provides conditions for actual device operation. Note 3: Unless otherwise specified min/max limits apply across the −55˚C to +125˚C temperature range for the DS7838 and across the 0˚C to +70˚C range for the = 25˚C and V DS8838. All typical values are for Note 4: All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted ...

Page 4

... Physical Dimensions inches (millimeters) unless otherwise noted www.national.com SO Package (M) Order Number DS8838M NS Package Number M16A Molded Dual-In-Line Package (N) Order Number DS8838N NS Package Number N16A 4 ...

Page 5

... 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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