Datasheet

 
   
      
SCHS275E − MARCH 2002 − REVISED OCTOBER 2003
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
typical load, count, and inhibit sequence for ’HC190
The following sequence is illustrated below:
1. Load (preset) to BCD 7
2. Count up to 8, 9 (maximum), 0, 1, and 2
3. Inhibit
4. Count down to 1, 0 (minimum), 9, 8, and 7
Parallel Load
Preset
Input
Data
P0
P1
P2
P3
Clock
Down/Up
Clock Enable
Q0
Q1
Q2
Q3
Terminal Count
Ripple Clock
Load
H
H
789012 2210987
L
L
L
L
H
H
H
H
H
L
L L
L
H
Count Up Inhibit Count Down