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HD74HC190 Datasheet, PDF (5/13 Pages) Hitachi Semiconductor – Synchronous Up/Down Decade,4-bit Binary Counter(Single Clock Line)
Logic Diagram
HD74HC190
Clock
Down/Up
Input A
Enable G
Input B
Input C
Input D
Load
HD74HC190/HD74HC191
CK P Q
CK A
INCL Q
CK P Q
CK B
INCL Q
CK P Q
CK C
INCL Q
CK P Q
CK D
INCL Q
Ripple
Clock
Max/Min
Output
QA
QB
QC
QD
5