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74LS155 Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 74LS155
Description  Dual 2-Line to 4-Line Decoders/Demultiplexers
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

74LS155 Datasheet(HTML) 4 Page - National Semiconductor (TI)

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’LS156 Switching Characteristics
at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)
From (Input)
RL e 2kX
Symbol
Parameter
To (Output)
CL e 15 pF
CL e 50 pF
Units
Min
Max
Min
Max
tPLH
Propagation Delay Time
A B C2 G1
28
53
ns
Low to High Level Output
or G2 to Y
tPHL
Propagation Delay Time
A B C2 G1
33
43
ns
High to Low Level Output
or G2 to Y
tPLH
Propagation Delay Time
A or B
28
53
ns
Low to High Level Output
to Y
tPHL
Propagation Delay Time
A or B
33
43
ns
High to Low Level Output
to Y
tPLH
Propagation Delay Time
C1
28
53
ns
Low to High Level Output
to Y
tPHL
Propagation Delay Time
C1
34
43
ns
High to Low Level Output
to Y
Logic Diagram
TLF6395 – 2
4


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