74AC11191 Datasheet, PDF (4/10 Pages) Texas Instruments – SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER

74AC11191
SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER
SCAS105A – FEBRUARY 1990 – REVISED APRIL 1993
typical load, count, and inhibit sequences
Illustrated below is the following sequence:
1. Load (preset) to binary thirteen
2. Count up to fourteen, fifteen (maximum), zero, one, and two
3. Inhibit
4. Count down to one, zero (minimum), fifteen, fourteen, and thirteen.
LOAD
A
B
Data
Inputs
C
D
CLOCK
D/U
CTEN
QA
QB
QC
QD
MAX/MIN
RCO
13 14 15
0
1
2
2
2
1
0
15 14 13
Count Up
Inhibit
Count Down
Load
4
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