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零件编号
产品描述 (功能)
DM74LS244 查看數據表(PDF) - Fairchild Semiconductor
零件编号
产品描述 (功能)
生产厂家
DM74LS244
Octal 3-STATE Buffer/Line Driver/Line Receiver
Fairchild Semiconductor
DM74LS244 Datasheet PDF : 6 Pages
1
2
3
4
5
6
Switching Characteristics
at V
CC
=
5V, T
A
=
25
°
C
Symbol
Parameter
t
PLH
Propagation Delay Time
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
HIGH-to-LOW Level Output
t
PZL
Output Enable Time to
LOW Level
t
PZH
Output Enable Time to
HIGH Level
t
PLZ
Output Disable Time
from LOW Level
t
PHZ
Output Disable Time
from HIGH Level
t
PLH
Propagation Delay Time
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
HIGH-to-LOW Level Output
t
PZL
Output Enable Time to
LOW Level
t
PZH
Output Enable Time to
HIGH Level
C
L
=
45 pF
R
L
=
667
Ω
C
L
=
45 pF
R
L
=
667
Ω
C
L
=
45 pF
R
L
=
667
Ω
C
L
=
45 pF
R
L
=
667
Ω
C
L
=
5 pF
R
L
=
667
Ω
C
L
=
5 pF
R
L
=
667
Ω
C
L
=
150 pF
R
L
=
667
Ω
C
L
=
150 pF
R
L
=
667
Ω
C
L
=
150 pF
R
L
=
667
Ω
C
L
=
150 pF
R
L
=
667
Ω
Conditions
Max
Units
18
ns
18
ns
30
ns
23
ns
25
ns
18
ns
21
ns
22
ns
33
ns
26
ns
3
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