HD74HC668 Datasheet, PDF (5/14 Pages) Hitachi Semiconductor – Synchronous UP/Down Decade,4-bit binary Counter

HD74HC669
Load
U/D
DA
Enable P
Enable T
DB
DC
DD
VCC
CK
HD74HC668/HD74HC669
TQ
IN Q
TQ
IN Q
TQ
IN Q
TQ
IN Q
QA
QB
QC
QD
RCO
5