DM74LS245 查看數據表（PDF） - Fairchild Semiconductor
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DM74LS245 Datasheet PDF : 6 Pages
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Switching Characteristics
VCC = 5V, TA = 25°C
Symbol
Parameter
tPLH
Propagation Delay Time,
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time,
HIGH-to-LOW Level Output
tPZL
Output Enable Time
to LOW Level
tPZH
Output Enable Time
to HIGH Level
tPLZ
Output Disable Time
from LOW Level
tPHZ
Output Disable Time
from HIGH Level
tPLH
Propagation Delay Time,
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time,
HIGH-to-LOW Level Output
tPZL
Output Enable Time
to LOW Level
tPZH
Output Enable Time
to HIGH Level
Conditions
CL = 45 pF
RL = 667Ω
CL = 5 pF
RL = 667Ω
CL = 150 pF
RL = 667Ω
Min
Max
Units
12
ns
12
ns
40
ns
40
ns
25
ns
25
ns
16
ns
17
ns
45
ns
45
ns
3
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