SN74ALS638A, SN74ALS639A, SN74AS638A, SN74AS639 OCTAL BUS TRANSCEIVERS
SDAS123A - DECEMBER 1983 - REVISED JANUARY 1995
features
- Bidirectional Bus Transceivers in High-Density 20-Pin Packages
- Choice of True or Inverting Logic
- A-Bus Outputs Are Open Collector; B-Bus Outputs Are 3 State
- Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs
description
These octal bus transceivers are designed for asynchronous two-waycommunication between open-collector and 3-state buses. The devicestransmit data from the A bus (open-collector) to the B bus (3 state)or from the B bus to the A bus, depending on the logic level at thedirection-control (DIR) input. The output-enable () input can be used to disable thedevice so the buses are isolated.
The -1 version of SN74ALS638A is identical to the standardversion, except that the recommended maximum IOL isincreased to 48 mA.
The SN74ALS638A, SN74ALS639A, SN74AS638A, and SN74AS639 arecharacterized for operation from 0°C to 70°C.
Title: OCTAL BUS TRANSCEIVERS
Product Family: STANDARD TRANSCEIVERS
Device Functionality: BUS TRANSCEIVERS
Orderable Devices: SN74ALS638A-1DW, SN74ALS638A-1DWR, SN74ALS638A-1N, SN74ALS638ADW, SN74ALS638AN, SN74ALS638A-1DW, SN74ALS638A-1DWR, SN74ALS638A-1N, SN74ALS639ADW, SN74ALS639ADWR, SN74ALS639AN, SN74AS638AN, SN74AS639DW, SN74AS639DWR, SN74AS639N
View the complete PDF datasheet: sdas123a.pdf (110 K Bytes) (Requires Acrobat Reader 3.x)View more information about generic part numbers:SN74ALS638A, SN74ALS638A-1, SN74ALS639A, SN74AS638A, SN74AS639
Go to the Engineering Design Center to locate information on other TI Semiconductor devices.
(c) Copyright 1998 Texas Instruments Incorporated. All rights reserved.
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