MC74AC74, MC74ACT74
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4
AC CHARACTERISTICS (For Figures and Waveforms See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
Symbol
Parameter
VCC*
(V)
74AC
Unit
Fig.
No.
TA = +25°C
CL = 50 pF
TA = 40°C
to +85°C
CL = 50 pF
Min
Typ
Max
Min
Max
fmax
Maximum Clock
Frequency
3.3
100
125
95
MHz
33
5.0
140
160
125
tPLH
Propagation Delay
CDn or SDn to Qn or Qn
3.3
5.0
8.0
12.5
4.0
13.0
ns
36
5.0
3.5
6.0
9.0
3.0
10.0
tPHL
Propagation Delay
CDn or SDn to Qn or Qn
3.3
4.0
10.5
12.0
3.5
13.5
ns
36
5.0
3.0
8.0
9.5
2.5
10.5
tPLH
Propagation Delay
CPn to Qn or Qn
3.3
4.5
8.0
13.5
4.0
16.0
ns
36
5.0
3.5
6.0
10.0
3.0
10.5
tPHL
Propagation Delay
CPn to Qn or Qn
3.3
3.5
8.0
14.0
3.5
14.5
ns
36
5.0
2.5
6.0
10.0
2.5
10.5
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC OPERATING REQUIREMENTS
Symbol
Parameter
VCC*
(V)
74AC
Unit
Fig.
No.
TA = +25°C
CL = 50 pF
TA = 40°C
to +85°C
CL = 50 pF
Typ
Guaranteed Minimum
ts
Set-up Time, HIGH or LOW
3.3
1.5
4.0
4.5
ns
39
Dn to CPn
5.0
1.0
3.0
th
Hold Time, HIGH or LOW
3.3
2.0
0.5
ns
39
Dn to CPn
5.0
1.5
0.5
tw
CPn or CDn or SDn
3.3
3.0
5.5
7.0
ns
36
Pulse Width
5.0
2.5
4.5
5.0
trec
Recovery TIme
3.3
2.5
0
ns
39
CDn or SDn to CP
5.0
2.0
0
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.