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

SN74F169
SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER
SDFS089 – MARCH 1987 – REVISED OCTOBER 1993
logic symbol, each flip-flop
TE
G2
Q1
CLK
1, 2T/C3
Q2
DATA
1, 3D
Q1
LOAD
M1
Q2
logic diagram, each flip-flop (positive logic)
TE
(Toggle
Enable)
CLK
Q1
Q2
DATA
LOAD
Q1
Q2
FUNCTION TABLE
(each flip-flop)
COUNTER
INPUTS
LOAD
L
L
H
H
CLK
↑
↑
↑
↑
FLIP-FLOP INPUTS
LOAD TE
H
L
H
L
L
H
L
L
CLK
↓
↓
↓
↓
DATA
H
L
X
X
OUTPUTS
Q
Q
H
L
L
H
Q0 Q0
Q0 Q0
2–4
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