SN54ALS640B
description
These octal bus transceivers are designed for asynchronous two-way munication between data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending upon the level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so that the buses are effectively isolated.
SN54ALS640B, SN54AS640 . . . J PACKAGE SN74ALS640B, SN74AS640 . . . DW OR N PACKAGE
(TOP VIEW)
DIR 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9
GND 10
20 VCC 19 OE 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8
SN54ALS640B, SN54AS640 . . . FK PACKAGE (TOP VIEW)
A1
A2
The -1 version of the SN74ALS640B is identical to the standard version, except that the remended maximum IOL for the -1 version is increased to 48 m A. There is no -1 version of the SN54ALS640B.
The SN54ALS640B and SN54AS640 are characterized for operation over the full military temperature range of
- 55°C to 125°C. The SN74ALS640B and...
