74AC257 Просмотр технического описания (PDF) - ON Semiconductor
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74AC257 Datasheet PDF : 12 Pages
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MC74AC257, MC74ACT257
AC CHARACTERISTICS (For Figures and Waveforms − See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
74AC
74AC
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = −40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Min Typ Max Min Max
Propagation Delay
tPLH
In to Zn
Propagation Delay
tPHL
In to Zn
Propagation Delay
tPLH
S to Zn
Propagation Delay
tPHL
S to Zn
tPZH
Output Enable Time
3.3 1.5 5.0 8.5 1.0 9.0
5.0 1.5 4.0 6.0 1.0 7.0
ns
3−5
3.3 1.5 6.0 8.5 1.0 9.0
5.0 1.5 4.5 6.0 1.0 7.0
ns
3−5
3.3 1.5 7.0 10.5 1.5 11.5
5.0 1.5 5.0 7.5 1.0 8.5
ns
3−6
3.3 1.5 7.5 10.5 1.5 11.5
5.0 1.5 5.5 7.5 1.0 8.5
ns
3−6
3.3 1.5 6.5 9.5 1.0 10.5
5.0 1.5 5.0 7.5 1.0 8.5
ns
3−7
tPZL
Output Enable Time
3.3 1.5 5.5 9.0 1.0 10.0
5.0 1.5 5.0 8.5 1.0 9.5
ns
3−8
tPHZ
Output Disable Time
3.3 1.5 5.5 10.0 1.0 11.0
5.0 1.5 5.0 9.0 1.0 10.0
ns
3−7
tPLZ
Output Disable Time
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
*Voltage Range 5.0 V is 5.0 V ±0.5 V.
3.3 1.5 5.5 9.0 1.0 10.0
5.0 1.5 5.0 8.0 1.0 9.0
ns
3−8
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