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DM54LS240 Datasheet(数据表) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件型号  DM54LS240
说明  Octal TRI-STATE Buffers/Line Drivers/Line Receivers
下载  6 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
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DM54LS240 Datasheet(HTML) 3 Page - National Semiconductor (TI)

   
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Switching Characteristics at VCC e 5V and TA e 25 C
Symbol
Parameter
Conditions
DM54LS
DM74LS
Units
Max
Max
tPLH
Propagation Delay Time
CL e 45 pF
LS240
18
14
ns
Low to High Level Output
RL e 667X
LS241
18
18
tPHL
Propagation Delay Time
CL e 45 pF
LS240
18
18
ns
High to Low Level Output
RL e 667X
LS241
18
18
tPZL
Output Enable Time to
CL e 45 pF
LS240
30
30
ns
Low Level
RL e 667X
LS241
30
30
tPZH
Output Enable Time to
CL e 45 pF
LS240
23
23
ns
High Level
RL e 667X
LS241
23
23
tPLZ
Output Disable Time
CL e 5 pF
LS240
25
25
ns
from Low Level
RL e 667X
LS241
25
25
tPHZ
Output Disable Time
CL e 5 pF
LS240
18
18
ns
from High Level
RL e 667X
LS241
18
18
tPLH
Propagation Delay Time
CL e 150 pF
LS240
18
ns
Low to High Level Output
RL e 667X
LS241
21
tPHL
Propagation Delay Time
CL e 150 pF
LS240
22
ns
High to Low Level Output
RL e 667X
LS241
22
tPZL
Output Enable Time to
CL e 150 pF
LS240
33
ns
Low Level
RL e 667X
LS241
33
tPZH
Output Enable Time to
CL e 150 pF
LS240
26
ns
High Level
RL e 667X
LS241
26
Note
54LS Output load is CL e 50 pF for tPLH tPHL tPZL and tPZH
3




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