74F257ASJ 查看數據表（PDF） - Fairchild Semiconductor
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74F257ASJ Datasheet PDF : 7 Pages
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AC Electrical Characteristics
Symbol
Parameter
Min
tPLH
Propagation Delay
2.5
tPHL
In to Zn
2.0
tPLH
Propagation Delay
4.0
tPHL
S to Zn
2.5
tPZH
Output Enable Time
2.0
tPZL
2.5
tPHZ
Output Disable Time
2.0
tPLZ
2.0
TA = +25°C
VCC = 5.0V
CL = 50 pF
Typ
Max
4.5
5.5
4.2
5.5
5.0
9.5
6.5
7.0
5.9
6.0
5.5
7.0
4.3
6.0
4.5
6.0
TA = −55°C to +125°C
VCC = 5.0V
CL = 50 pF
Min
Max
2.0
7.0
1.5
7.0
3.5
11.5
2.5
9.0
2.0
8.0
2.5
9.0
2.0
7.0
2.0
8.5
TA = 0°C to +70°C
VCC = 5.0V
CL = 50 pF
Min
Max
2.0
6.0
2.0
6.0
3.5
10.5
2.5
8.0
2.0
7.0
2.5
8.0
2.0
7.0
2.0
7.0
Units
ns
ns
ns
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