HD74HC640 Datasheet, PDF (3/11 Pages) Hitachi Semiconductor – Octal Bus Transceivers (with 3-state outputs)

HD74HC640, HD74HC643
Logic Diagram
HD74HC640
G
DIR
VCC
A
B
VCC
HD74HC643
G
DIR
To 7 Other
Inverters
To 7 Other
Inverters
VCC
A
B
VCC
To 7 Other
Inverters
To 7 Other
Inverters
Rev.2.00 Mar 30, 2006 page 3 of 10