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零件编号
产品描述 (功能)
DM74LS240 查看數據表(PDF) - Fairchild Semiconductor
零件编号
产品描述 (功能)
生产厂家
DM74LS240
Octal 3-STATE Buffer/Line Driver/Line Receiver
Fairchild Semiconductor
DM74LS240 Datasheet PDF : 7 Pages
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2
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7
Switching Characteristics
at V
CC
=
5V and 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
DM74LS240
DM74LS241
DM74LS240
DM74LS241
DM74LS240
DM74LS241
DM74LS240
DM74LS241
DM74LS240
DM74LS241
DM74LS240
DM74LS241
DM74LS240
DM74LS241
DM74LS240
DM74LS241
DM74LS240
DM74LS241
DM74LS240
DM74LS241
Max
14
18
18
18
30
30
23
23
25
25
18
18
18
21
22
22
33
33
26
26
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
www.fairchildsemi.com
4
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