MC74AC256N Просмотр технического описания (PDF) - Motorola => Freescale
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MC74AC256N Datasheet PDF : 7 Pages
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MC74AC256 MC74ACT256
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
74ACT
74ACT
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
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPHL
Propagation Delay
Dn to Qn
Propagation Delay
Dn to Qn
Propagation Delay
E to Qn
Propagation Delay
E to Qn
Propagation Delay
Address to Qn
Propagation Delay
Address to Qn
Propagation Delay
MR to Q
5.0 2.0 6.5 11.5 1.5 13.0
ns
3-5
5.0 2.0 7.0 11.0 1.5 12.5
ns
3-5
5.0 2.0 8.0 12.0 1.5 14.0
ns
3-6
5.0 2.0 6.5 10.5 1.5 12.5
ns
3-6
5.0 2.0 10.5 14.5 1.5 17.0
ns
3-6
5.0 2.0 9.0 12.5 1.5 14.5
ns
3-6
5.0 2.0 7.0 10.5 1.5 11.5
ns
3-7
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC OPERATING REQUIREMENTS
Symbol
Parameter
ts
Setup Time, HIGH or LOW
Dn to E
th
Hold Time, HIGH or LOW
Dn to E
ts
Setup Time
Address to E
th
Hold Time
Address to E
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
74ACT
74ACT
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Typ
Guaranteed Minimum
5.0
3.5
4.5
ns
3-9
5.0
2.5
2.5
ns
3-9
5.0
5.5
6.5
ns
3-6
5.0
2.5
2.5
ns
3-6
CAPACITANCE
Symbol
Parameter
CIN
CPD
Input Capacitance
Power Dissipation Capacitance
Value
Typ
Unit
4.5
pF
30.0
pF
Test Conditions
VCC = 5.0 V
VCC = 5.0 V
FACT DATA
5-6
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