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DS8838

National Semiconductor
Part Number DS8838
Manufacturer National Semiconductor
Description Quad Unified Bus Transceiver
Published Mar 30, 2005
Detailed Description DS8838 Quad Unified Bus Receiver May 1999 DS8838 Quad Unified Bus Transceiver General Description The DS8838 is a quad...
Datasheet PDF File DS8838 PDF File

DS8838
DS8838

Overview
DS8838 Quad Unified Bus Receiver May 1999 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 interconnected by terminated 120Ω impedance lines.
The external termination is intended to be 180Ω resistor from the bus to the +5V logic supply together with a 390Ω resistor from the 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 VCC = 0V.
The receivers incorporate hysteresis to greatly enhance bus noise immunity.
One two-input NOR gate is included to disable all drivers in a package simultaneously.
Receiver performance is optimized for systems with bus rise and fall times ≤ 1.
0 µs/V.
Features n n n n n n n n n 4 totally separate driver/receiver pairs per package 1V typical receiver input hysteresis Receiver hysteresis independent of receiver output load Guaranteed minimum bus noise immunity of 1.
3V, 2V typ.
Temperature-insensitive receiver thresholds track bus logic levels 20 µA typical bus terminal current with normal VCC or with VCC = 0V Open collector driver output allows wire-OR connection High speed Series 74 TTL compatible driver and disable inputs and receiver outputs Typical Application DS005812-1 © 1999 National Semiconductor Corporation DS005812 www.
national.
com Connection Diagram Dual-In-Line Package DS005812-2 Top View Order Number DS7838J, DS8838M or DS8838N See NS Package Number J16A, M16A or N16A www.
national.
com 2 Absolute Maximum Ratings (Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Supply Voltage Input and Output Voltage Storage Temperature Range Lead Temperature, (Soldering, 4 sec.
) 7V 5.
5V −65˚C to +150˚C 260˚C Molded DIP Package: 1362 mW SO Package: 1002 mW Operating Conditio...


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