HD74HCT640 Datasheet, PDF (3/7 Pages) Hitachi Semiconductor – Octal Bus Transceivers (with 3-state outputs)

HD74HCT643
HD74HCT640/HD74HCT643
Block Diagram
HD74HCT640
G
DIR
DIR 1
A1 2
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND 10
(Top view)
20 VCC
19 Enable G
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
VCC
A
B
VCC
To 7 other inverters To 7 other inverters
3