HD74HC190 Datasheet, PDF (5/13 Pages) Hitachi Semiconductor – Synchronous Up/Down Decade,4-bit Binary Counter(Single Clock Line)

HD74HC190, HD74HC191
Logic Diagram
HD74HC190
Clock
Down/Up
Input A
Enable G
Input B
Input C
Input D
Load
HD74HC191
Clock
Down/Up
Input A
Enable G
Input B
Input C
Input D
Load
Rev.3.00, Jan 31, 2006 page 5 of 12
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
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