74HC648 Datasheet, PDF (3/12 Pages) NXP Semiconductors – Octal bus transceiver/register; 3-state; inverting

Philips Semiconductors
Octal bus transceiver/register; 3-state;
inverting
Product specification
74HC/HCT648
PIN DESCRIPTION
PIN NO.
1
2
3
4, 5, 6, 7, 8, 9, 10, 11
12
20, 19, 18, 17, 16, 15, 14, 13
21
22
23
24
SYMBOL
CP_AB
S_AB
DIR
A₀ to A₇
GND
B₀ to B₇
OE
S_BA
CP_BA
V_CC
NAME AND FUNCTION
A to B clock input (LOW-to-HIGH, edge-triggered)
select A to B source input
direction control input
A data inputs/outputs
ground (0 V)
B data inputs/outputs
output enable input (active LOW)
select B to A source input
B to A clock input (LOW-to-HIGH, edge-triggered)
positive supply voltage
Fig.1 Pin configuration.
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.
December 1990
3