74F253 查看數據表（PDF） - Fairchild Semiconductor
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74F253 Datasheet PDF : 7 Pages
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AC Electrical Characteristics
Symbol
Parameter
Min
tPLH
Propagation Delay
4.5
tPHL
Sn to Zn
3.0
tPLH
Propagation Delay
3.0
tPHL
In to Zn
2.5
tPZH
Output Enable Time
3.0
tPZL
3.0
tPHZ
Output Disable Time
2.0
tPLZ
2.0
TA = +25°C
VCC = 5.0V
CL = 50 pF
Typ
Max
8.5
11.5
6.5
9.0
5.5
7.0
4.5
6.0
6.0
8.0
6.0
8.0
3.7
5.0
4.4
6.0
TA = −55°C to +125°C
VCC = 5.0V
CL = 50 pF
Min
Max
3.5
15.0
2.5
11.0
2.5
9.0
2.5
8.0
2.5
10.0
2.5
10.0
2.0
6.5
2.0
8.0
TA = 0°C to +70°C
VCC = 5.0V
CL = 50 pF
Min
Max
4.5
13.0
3.0
10.0
3.0
8.0
2.5
7.0
3.0
9.0
3.0
9.0
2.0
6.0
2.0
7.0
Units
ns
ns
ns
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