HD74LS669 Datasheet, PDF (2/9 Pages) Hitachi Semiconductor – Synchronous Up/Down 4-bit Binary Counters

HD74LS669
Pin Arrangement
U/D 1
CK 2
A3
Data ^{B 4}
Inputs
C5
D6
Enable P 7
GND 8
Block Diagram
Clock
U/D
Load
Enable P
Enable T
Data A
Data B
(Top view)
16 V_CC
15
Ripple
Carry Output
14 Q_A
13 Q_B
Outputs
12 Q_C
11 Q_D
10 Enable T
9 Load
DQ
Q_A
CK
Q
DQ
Q_B
CK
Q
DQ
Q_C
CK
Q
Data C
DQ
Q_D
CK
Q
Data D
Rev.2.00, Feb.18.2005, page 2 of 8
Ripple
Carry
Output