HD74HC190 Datasheet, PDF (2/13 Pages) Hitachi Semiconductor – Synchronous Up/Down Decade,4-bit Binary Counter(Single Clock Line)

HD74HC190, HD74HC191
Pin Arrangement
Inputs Data B 1
Outputs
QB 2
QA 3
Inputs
Enable G 4
Down/Up 5
Outputs
QC 6
QD 7
GND 8
B
QB
A
QA
CK
G
Ripple
Clock
Dn/Up Max/Min
QC ^Load
QD _D C
(Top view)
16 V_CC
15 Data A
14 Clock
Inputs
13
Ripple
Clock
12 Max/Min
Outputs
11 Load
10 Data C _Inputs
9 Data D
Rev.3.00, Jan 31, 2006 page 2 of 12