Datasheet

2
Functional Diagram
TRUTH TABLE
OPERATING
MODE
INPUTS OUTPUT
CP MR S1 S0 DSR DSL D
n
Q
0
Q
1
Q
2
Q
3
Reset (Clear) X L X X X X X LLLL
Hold (Do Nothing) X H l l X X X q
0
q
1
q
2
q
3
Shift Left ↑ H h l XlXq
1
q
2
q
3
L
↑ Hh l XhXq
1
q
2
q
3
H
Shift Right ↑ Hl hlXXLq
0
q
1
q
2
↑ Hl hhXXHq
0
q
1
q
2
Parallel Load ↑ Hh hXXd
n
d
0
d
1
d
2
d
3
H = High Voltage Level,
h = High Voltage Level One Set-up Time Prior To The Low to High Clock Transition,
L = Low Voltage Level,
l = Low Voltage Level One Set-up Time Prior to the Low to High Clock Transition,
d
n
(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,
X = Don’t Care,
↑ = Transition from Low to High Level
14
12
13
15
Q
0
Q
1
Q
2
Q
3
7
6
3
4
5
D
0
D
1
D
2
D
3
GND = 8
V
CC
= 16
2 9 10 1 11
DSL
DSR
S0
S1
MR
CP
CD54HC194, CD74HC194, CD74HCT194