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HD74LS194A Datasheet(PDF) 2 Page - Renesas Technology Corp

Part No. HD74LS194A
Description  4-bit Bidirectional Universal Shift Register
Download  8 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD74LS194A Datasheet(HTML) 2 Page - Renesas Technology Corp

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HD74LS194A
Rev.3.00, Jul.15.2005, page 2 of 7
Function Table
Inputs
Outputs
Mode
Serial
Parallel
Clear
S1
S0
Clock
Left
Right
A
B
C
D
QA
QB
QC
QD
L
X
X
X
X
X
X
X
X
X
L
L
L
L
H
X
X
L
X
X
X
X
X
X
QA0
QB0
QC0
QD0
H
H
H
X
X
a
b
c
d
a
b
c
d
H
L
H
X
H
X
X
X
X
H
QAn
QBn
QCn
H
L
H
X
L
X
X
X
X
L
QAn
QBn
QCn
H
H
L
H
X
X
X
X
X
QBn
QCn
QDn
H
H
H
L
L
X
X
X
X
X
QBn
QCn
QDn
L
H
L
L
X
X
X
X
X
X
X
QAo
QBo
QCo
QDo
Notes: 1. H; high level, L; low level, X; irrelevant
2.
↑; transition from low to high level
3. a to d; the level of steady-state input at inputs A, B, C, or D, respectively
4. QA0 to QD0; the level of QA, QB, QC, or QD, respectively before the indicated steady-state input conditions were
established.
5. QAn to QDn; the level of QA, QB, QC, or QD, respectively before the most-recent
↑ transition of the clock.
Block Diagram
Clear
Clock
Shift
Right
Serial
Input
Shift
Left
Serial
Input
CK
S
Clear
R
QD
CK
S
Clear
R
QC
CK
S
Clear
R
QB
CK
S
Clear
R
QA
S1
S0
QA
QB
QC
Parallel Outputs
QD
A
Mode
Control
Inputs
BC
D
Parallel Inputs


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