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CD74HC194 Datasheet(PDF) 2 Page - Texas Instruments

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Part No. CD74HC194
Description  High-Speed CMOS Logic 4-Bit Bidirectional Universal Shift Register
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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CD74HC194 Datasheet(HTML) 2 Page - Texas Instruments

   
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Functional Diagram
14
12
13
15
Q0
Q1
Q2
Q3
7
6
3
4
5
D0
D1
D2
D3
GND = 8
VCC = 16
2
9
10
1
11
DSL
DSR
S0
S1
MR
CP
TRUTH TABLE
OPERATING
MODE
INPUTS
OUTPUT
CP
MR
S1
S0
DSR
DSL
Dn
Q0
Q1
Q2
Q3
Reset (Clear)
X
L
X
X
X
X
X
LLLL
Hold (Do Nothing)
X
H
l (Note 2)
l (Note 2)
X
X
X
q0
q1
q2
q3
Shift Left
H
h
l (Note 2)
X
l
X
q1
q2
q3
L
H
h
l (Note 2)
X
h
X
q1
q2
q3
H
Shift Right
H
l (Note 2)
h
l
X
X
L
q0
q1
q2
H
l (Note 2)
h
h
X
X
H
q0
q1
q2
Parallel Load
Hh
h
X
X
dn
d0
d1
q2
d3
NOTES:
1. 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,
dn (qn) = 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
2. The High to Low transition of the S0 and S1 Inputs on the CD74HC194, CD74HCT194 should only take place while CP is High for
Conventional Operation.
CD74HC194, CD74HCT194


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