hd74hc668 Renesas Electronics Corporation., hd74hc668 Datasheet - Page 2

• Manufacturer Part Number: hd74hc668
• Description: Synchronous Up/down Decade Counter
• Manufacturer: Renesas Electronics Corporation.

HD74HC668, HD74HC669
Pin Arrangement
HD74HC668
HD74HC669
Rev.2.00 Mar 30, 2006 page 2 of 10
Data
inputs
Data
inputs
Enable P
Enable P
GND
GND
U/D
U/D
CK
CK
C
D
C
D
A
B
A
B
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
(Top view)
(Top view)
16
15
14
13
12
11
10
16
15
14
13
12
11
10
9
9
V
Ripple
carry
output
Q
Q
Q
Q
Enable T
Load
V
Ripple
carry
output
Q
Q
Q
Q
Enable T
Load
CC
CC
A
B
C
D
A
B
C
D
Outputs
Outputs