SN74ALS645A
SN74ALS645A is Octal Bus Transceivers manufactured by Texas Instruments.
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 on 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.
A2
A1
SN54ALS645A, SN54AS645 . . . J PACKAGE SN74ALS645A, SN74AS645 . . . 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
SN54ALS645A, SN54AS645 . . . FK PACKAGE (TOP VIEW)
The -1 version of the SN74ALS645A is identical to the standard version, except that the remended maximum IOL is increased to 48 m A. There is no -1 version of the SN54ALS645A.
The SN54ALS645A and SN54AS645 are characterized for operation over the full military temperature range of
- 55°C to 125°C. The SN74ALS645A and SN74AS645 are characterized for operation from 0°C to 70°C.
A8
B8
3 2 1 20 19
A3 4
18 B1
A4 5
17 B2
A5 6
16 B3
A6 7
15 B4
A7 8
14 B5
9 10 11 12 13
B7
B6
FUNCTION TABLE
INPUTS OE DIR
OPERATION
B data to A...
