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DM74ALS257N Scheda tecnica(PDF) 4 Page - Fairchild Semiconductor

Il numero della parte DM74ALS257N
Spiegazioni elettronici  3-STATE Quad 1-of-2-Line Data Selector/Multiplexer
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Produttore elettronici  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

DM74ALS257N Scheda tecnica(HTML) 4 Page - Fairchild Semiconductor

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Switching Characteristics DM74ALS257
over recommended operating free air temperature range
Switching Characteristics DM74ALS258
over recommended operating free air temperature range
Symbol
Parameter
Conditions
From
To
Min
Max
Units
tPLH
Propagation Delay Time
VCC = 4.5V to 5.5V
Data
Any Y
2
10
ns
LOW-to-HIGH Level Output
CL = 50 pF
tPHL
Propagation Delay Time
RL = 500Ω
Data
Any Y
2
12
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
Select
Any Y
4
18
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
Select
Any Y
5
22
ns
HIGH-to-LOW Level Output
tZH
Output Enable Time
Output
Any Y
4
16
ns
to HIGH Level
Control
tZL
Output Enable Time
Output
Any Y
5
18
ns
to LOW Level
Control
tHZ
Output Disable Time
Output
Any Y
2
10
ns
from HIGH Level
Control
tLZ
Output Disable Time
Output
Any Y
3
15
ns
from LOW Level
Control
Symbol
Parameter
Conditions
From
To
Min
Max
Units
tPLH
Propagation Delay Time
VCC = 4.5V to 5.5V
Data
Any Y
2
8
ns
LOW-to-HIGH Level Output
CL = 50 pF
tPHL
Propagation Delay Time
RL = 500Ω
Data
Any Y
2
7
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
Select
Any Y
3
20
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
Select
Any Y
5
25
ns
HIGH-to-LOW Level Output
tZH
Output Enable Time
Output
Any Y
5
18
ns
to HIGH Level
Control
tZL
Output Enable Time
Output
Any Y
5
18
ns
to LOW Level
Control
tHZ
Output Disable Time
Output
Any Y
2
10
ns
from HIGH Level
Control
tLZ
Output Disable Time
Output
Any Y
3
18
ns
from LOW Level
Control


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