
MC74AC648 MC74ACT648
5-5
FACT DATA
AC CHARACTERISTICS
(For Figures and Waveforms — See Section 3)
Symbol
Parameter
(V)
74AC
74AC
Unit
No.
VCC*
TA = +25
°
C
CL = 50 pF
TA = –40
°
C
to +85
°
C
CL = 50 pF
Fig.
Min
Typ
Max
Min
Max
tPLH
Propagation Delay
Clock to Bus
3.3
5.0
1.5
1.5
10
7.0
15.5
11
1.5
1.5
17
12
ns
3-6
tPHL
Propagation Delay
Clock to Bus
3.3
5.0
1.5
1.5
8.5
6.0
13.5
10.5
1.5
1.5
14.5
11.5
ns
3-6
tPLH
Propagation Delay
Bus to Bus
3.3
5.0
1.5
1.5
6.0
4.0
10
7.0
1.5
1.0
11
7.5
ns
3-5
tPHL
Propagation Delay
Bus to Bus
3.3
5.0
1.5
1.5
5.5
3.5
9.0
7.5
1.5
1.0
10
8.0
ns
3-5
Propagation Delay
SBA or SAB to An or Bn
(w/An or Bn HIGH or LOW)
Propagation Delay
(w/An or Bn HIGH or LOW)
Enable Time
G to An or Bn
Enable Time
G to An or Bn
Disable Time
G to An or Bn
Disable Time
G to An or Bn
Enable Time
DIR to An or Bn
Enable Time
DIR to An or Bn
Disable Time
DIR to An or Bn
Disable Time
DIR to An or Bn
3.3
5.0
1.5
1.5
7.5
5.5
12.5
9.0
1.5
1.5
14
10
3-6
tPLH
ns
tPHL
3.3
5.0
1.5
1.5
7.5
5.5
12.5
9.5
1.5
1.5
14
10.5
ns
3-6
SBA or SAB to An or Bn
tPZH
3.3
5.0
1.5
1.5
6.5
5.0
11
8.0
1.0
1.0
11.5
9.0
ns
3-7
tPZL
3.3
5.0
1.5
1.5
7.0
5.0
11
8.0
1.0
1.0
12.5
9.0
ns
3-8
tPHZ
3.3
5.0
1.5
1.5
7.5
6.0
12
10
1.0
1.0
13
11
ns
3-7
tPLZ
3.3
5.0
1.5
1.5
7.0
5.5
11.5
9.0
1.0
1.0
12.5
10
ns
3-8
tPZH
3.3
5.0
1.5
1.5
6.0
4.5
12.5
9.5
1.0
1.0
14
10.5
ns
3-7
tPZL
3.3
5.0
1.5
1.5
6.5
4.5
13
9.0
1.5
1.0
14.5
10.5
ns
3-8
tPHZ
3.3
5.0
1.5
1.5
7.0
5.5
11.5
9.0
1.0
1.0
13.5
10
ns
3-7
tPLZ
3.3
5.0
1.5
1.5
7.0
50
13.5
9.5
1.5
1.0
15
10
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.