MC74AC574, MC74ACT574
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
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
fmax
Maximum Clock
Frequency
3.3 75
–
5.0 95
–
–
60
–
–
85
–
MHz 3–3
tPLH
tPHL
tPZH
Propagation Delay
CP to On
Propagation Delay
CP to On
Output Enable Time
3.3 3.5
– 13.5 3.5
15
5.0 2.0
–
9.5 2.0
11
ns
3–6
3.3 3.5
–
12 3.5 13.5
5.0 2.0
–
8.5 2.0 9.5
ns
3–6
3.3 2.5
–
11 2.5 12
5.0 2.0
–
8.5 2.0 9.0
ns
3–7
tPZL
Output Enable Time
3.3 3.0
– 10.5 3.5 11.5
5.0 1.5
–
8.0 2.0 9.0
ns
3–8
tPHZ
Output Disable Time
3.3 4.0
–
12 4.5 13
5.0 2.0
–
9.5 2.0 10.5
ns
3–7
tPLZ
Output Disable Time
3.3 2.0
–
9.0 2.5
10
5.0 1.5
–
7.5 1.5 8.5
ns
3–8
* 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
Setup Time, HIGH or LOW
ts
Dn to CP
Hold Time, HIGH or LOW
th
Dn to CP
CP Pulse Width
tw
HIGH or LOW
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
74AC
74AC
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Typ
Guaranteed Minimum
3.3
–
2.5
5.0
–
1.5
3.3
–
1.5
5.0
–
1.5
3.0
2.0
ns
3–9
1.5
1.5
ns
3–9
3.3
–
6.0
5.0
–
4.0
7.0
5.0
ns
3–6
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