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5495A Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 5495A
Description  4-Bit Parallel Access Shift Registers
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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5495A Datasheet(HTML) 3 Page - National Semiconductor (TI)

   
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Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)
Symbol
Parameter
From (Input)
RL e 400X CL e 15 pF
Units
To (Output)
Min
Max
fMAX
Maximum Clock Frequency
25
MHz
tPHL
Propagation Delay Time
Clock to
35
ns
High to Low Level Output
Output
tPLH
Propagation Delay Time
Clock to
35
ns
Low to High Level Output
Output
Function Table
Inputs
Outputs
Mode
Clocks
Serial
Parallel
QA
QB
QC
QD
Control
2(L)
1(R)
A
B
C
D
HH
X
X
X
X
X
X
QA0
QB0
QC0
QD0
H
v
XXa
b
c
d
a
b
c
d
H
v
XX
QB
QC
QD
dQBn
QCn
QDn
d
LL
H
X
X
X
X
X
QA0
QB0
QC0
QD0
LX
v
HX
X
X
X
H
QAn
QBn
QCn
LX
v
LX
X
X
X
L
QAn
QBn
QCn
u
LL
X
X
X
X
X
QA0
QB0
QC0
QD0
v
LL
X
X
X
X
X
QA0
QB0
QC0
QD0
v
LH
X
X
X
X
X
QA0
QB0
QC0
QD0
u
HL
X
X
X
X
X
QA0
QB0
QC0
QD0
u
HH
X
X
X
X
X
QA0
QB0
QC0
QD0
Shifting left requires external connection of QB to A QC to B QD to C Serial data is entered at input D
H e High Level (Steady State) L e Low Level (Steady State) X e Don’t Care (Any input including transitions)
v e Transition from high to low level u e Transition from low to high level
a b c d e The level of steady state input at inputs A B C or D respectively
QA0 QB0 QC0 QD0 e The level of QA QB QC QD respectively before the indicated steady state input conditions were established
QAn QBn QCn QDn e The level of QA QB QC QD respectively before the most recent
v transition of the clock
Logic Diagram
TLF6534 – 2
3


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