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DM54LS273J Fiches technique(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No de pièce DM54LS273J
Description  8-Bit Register with Clear
PDF  6 Pages
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

DM54LS273J Fiches technique(HTML) 3 Page - National Semiconductor (TI)

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Switching Characteristics VCC ea50V TA ea25 C
CL e 15 pF
Symbol
Parameter
DM54LS
DM74LS
Units
RL e 2kX
Min
Max
Min
Max
fmax
Maximum Clock Frequency
30
30
MHz
tPLH
Propagation Delay
24
24
ns
tPHL
CP to Qn
24
24
tPLH
Propagation Delay
27
27
ns
MR to Qn
Functional Description
The ’LS273 is an 8-bit parallel register with a common Clock
and common Master Reset When the MR input is LOW the
Q outputs are LOW independent of the other inputs Infor-
mation meeting the setup and hold time requirements of the
D inputs is transferred to the Q outputs on the LOW-to-
HIGH transition of the clock input
Truth Table
Inputs
Outputs
MR
CP
Dn
Qn
LX
X
L
H
L
HH
H
L
LL
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
Logic Symbol
TLF9825 – 2
VCC e Pin 20
GND e Pin 10
Logic Diagram
TLF9825 – 3
3



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