Datasheet
2
Functional Diagram
TRUTH TABLE
OPERATING MODES
INPUTS OUTPUT
MR CP PE J KDnQ
0
Q
1
Q
2
Q
3
Q
3
Asynchronous Reset L XXXXXLLLLH
Shift, Set First Stage H ↑ hhhX
H
q
0
q
1
q
2
q
2
Shift, Reset First Stage H ↑ hl lXLq
0
q
1
q
2
q
2
Shift, Toggle First Stage H ↑ hh lXq
0
q
0
q
1
q
2
q
2
Shift, Retain First Stage H ↑ hlhXq
0
q
0
q
1
q
2
q
2
Parallel Load H ↑ lXXdnd
0
d
1
d
2
d3 d2
H = High Voltage Level
L = Low Voltage Level,
X = Don’t Care
↑ = Transition from Low to High Level
l = Low Voltage Level One Set-up Time Prior to the Low to High Clock Transition
h = Low Voltage Level One Set-up Time prior to the High to Low Clock Transition,
dn (q
n
) = Lower Case Letters Indicate the State of the Referenced Input (or output) One Set-up Time Prior to the Low to High Clock
Transition.
11
Q
3
1
2
10
3
J
CP
K
MR
15 14 13 12
94567
Q
0
Q
1
Q
2
Q
3
D
0
D
1
D
2
D
3
PE
CD54HC195, CD74HC195