SN74F169 Datasheet, PDF (5/9 Pages) Texas Instruments – SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER

SN74F169
SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER
SDFS089 – MARCH 1987 – REVISED OCTOBER 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
CLK
U/D
ENP and ENT
Data
Outputs
QA
QB
QC
QD
RCO
13 14 15 0 1 2
2 2 1 0 15 14 13
Count Up
Inhibit
Count Down
Load
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