CD54HC190_15 Datasheet, PDF (8/31 Pages) Texas Instruments – SYNCHORONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL

CD54HC190, CD74HC190
CD54HC191, CD74HC191, CD54HCT191, CD74HCT191
SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
SCHS275E − MARCH 2002 − REVISED OCTOBER 2003
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
L
P0
H
P1
H
Preset
Input
Data _P2
H
P3
Clock
Down/Up
L
Clock Enable
L
H
Q0
H
L
Q1
L
H
Q2
L
L
Q3
H
H
Terminal Count
L
Ripple Clock
7
8
9
0 12
2
2
1
0
9
8
7
Count Up
Inhibit
Count Down
Load
8
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265