HD74HC668 Datasheet, PDF (2/11 Pages) Hitachi Semiconductor – Synchronous UP/Down Decade,4-bit binary Counter

HD74HC668, HD74HC669
Pin Arrangement
HD74HC668
U/D 1
CK 2
A3
Data
inputs
B4
C5
D6
Enable P ⁷
GND 8
16 VCC
Ripple
15 carry
output
14 Q_A
13 Q_B
12 Q_C
Outputs
11 Q_D
10 Enable T
9 Load
HD74HC669
(Top view)
U/D 1
CK 2
A3
Data
inputs
B4
C5
D6
Enable P 7
GND 8
16 VCC
Ripple
15 carry
output
14 Q_A
13 Q_B
12 Q_C
Outputs
11 Q_D
10 Enable T
9 Load
(Top view)
Rev.2.00 Mar 30, 2006 page 2 of 10