MC74AC646, MC74ACT646
AC CHARACTERISTICS (For Figures and Waveforms – See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
74ACT
74ACT
T
= –40°C
A
T
C
= +25°C
= 50 pF
V
(V)
*
Fig.
No.
A
L
CC
to +85°C
C
Symbol
Parameter
Unit
= 50 pF
L
Min
Typ
Max
Min
Max
Propagation Delay
Clock to Bus
t
t
t
t
5.0
5.0
5.0
5.0
3.5
12.0
14.5
3.0
16.0
16.0
12.0
12.0
ns
ns
ns
ns
3–6
3–6
3–5
3–5
PLH
Propagation Delay
Clock to Bus
4.0
3.0
2.5
12.0
8.5
14.5
11.0
11.0
3.5
2.5
2.0
PHL
PLH
PHL
Propagation Delay
Bus to Bus
Propagation Delay
Bus to Bus
8.5
Propagation Delay
t
t
5.0
5.0
3.0
3.0
9.5
9.5
12.0
12.0
2.5
2.5
13.0
13.0
ns
ns
3–6
3–6
SBA or SAB to A or B
PLH
PHL
n
n
(w/A or B HIGH or LOW)
n
n
Propagation Delay
SBA or SAB to A or B
n
n
(w/A or B HIGH or LOW)
n
n
Enable Time
G to A or B
t
t
t
t
t
t
t
t
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
2.0
3.5
5.0
3.5
2.0
3.5
5.0
3.5
9.0
9.0
11.0
11.0
13.0
12.5
12.5
12.5
12.5
12.5
1.5
3.0
4.5
3.0
1.5
3.0
4.5
3.0
12.0
12.0
14.5
14.0
13.5
13.5
13.5
13.5
ns
ns
ns
ns
ns
ns
ns
ns
3–7
3–8
3–7
3–8
3–7
3–8
3–7
3–8
PZH
PZL
PHZ
PLZ
PZH
PZL
PHZ
PLZ
n
n
Enable Time
G to A or B
n
n
Disable Time
G to A or B
10.5
10.0
6.5
n
n
Disable Time
G to A or B
n
n
Enable Time
DIR to A or B
n
n
n
n
n
Enable Time
DIR to A or B
n
6.5
Disable Time
DIR to A or B
n
8.5
Disable Time
8.5
DIR to A or B
n
*Voltage Range 5.0 V is 5.0 V ±0.5 V.
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