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DM74LS244N Fiches technique(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No de pièce DM74LS244N
Description  Octal TRI-STATEE Buffers/Line Drivers/Line Receivers
Download  6 Pages
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

DM74LS244N Fiches technique(HTML) 3 Page - National Semiconductor (TI)

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Switching Characteristics at VCC e 5V TA e 25 C (see Section 1 for Test Waveforms and Output Load)
Symbol
Parameter
Conditions
54LS Max
DM74LS Max
Units
tPLH
Propagation Delay Time
CL e 45 pF
18
18
ns
Low to High Level Output
RL e 667X
tPHL
Propagation Delay Time
CL e 45 pF
18
18
ns
High to Low Level Output
RL e 667X
tPZL
Output Enable Time to
CL e 45 pF
30
30
ns
Low Level
RL e 667X
tPZH
Output Enable Time to
CL e 45 pF
23
23
ns
High Level
RL e 667X
tPLZ
Output Disable Time
CL e 5pF
25
25
ns
from Low Level
RL e 667X
tPHZ
Output Disable Time
CL e 5pF
18
18
ns
from High Level
RL e 667X
tPLH
Propagation Delay Time
CL e 150 pF
21
ns
Low to High Level Output
RL e 667X
tPHL
Propagation Delay Time
CL e 150 pF
22
ns
High to Low Level Output
RL e 667X
tPZL
Output Enable Time to
CL e 150 pF
33
ns
Low Level
RL e 667X
tPZH
Output Enable Time to
CL e 150 pF
26
ns
High Level
RL e 667X
Note
54LS Output Load is CL e 50 pF for tPLH tPHL tPZL and tPZH
3


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