HD74HC390 Datasheet, PDF (3/9 Pages) Hitachi Semiconductor – Dual Decade Counters

Block Diagram (1/2)
Clear
A
B
HD74HC390
CK CK
D
R
Q
Q
A
CK CK
D
R
Q
Q
B
CK CK
D
R
Q
Q
C
CK CK
D
R
Q
Q
D
3