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零件编号
产品描述 (功能)
74F648SPCX 查看數據表(PDF) - Fairchild Semiconductor
零件编号
产品描述 (功能)
生产厂家
74F648SPCX
Octal Transceiver/Register with 3-STATE Outputs
Fairchild Semiconductor
74F648SPCX Datasheet PDF : 9 Pages
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AC Electrical Characteristics
74F646/74F648
Symbol
Parameter
f
MAX
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PZH
t
PZL
t
PHZ
t
PLZ
Maximum Clock Frequency
Propagation Delay
Clock to Bus
Propagation Delay
Bus to Bus (74F646)
Propagation Delay
Bus to Bus (74F648)
Propagation Delay
SBA or SAB to A or B
Enable Time
OE to A or B
Disable Time
OE to A or B
Enable Time
DIR to A or B
Disable Time
DIR to A or B
T
A
= +
25
°
C
V
CC
= +
5.0V
C
L
=
50 pF
Min
Max
90
2.0
7.0
2.0
8.0
1.0
7.0
1.0
6.5
2.0
8.5
1.0
7.5
2.0
8.5
2.0
8.0
2.0
8.5
2.0
12.0
1.0
7.5
2.0
9.0
2.0
14.0
2.0
13.0
1.0
9.0
2.0
11.0
T
A
= −
55
°
C to
+
125
°
C
V
CC
= +
5.0V
C
L
=
50 pF
Min
Max
75
2.0
8.5
2.0
9.5
1.0
8.0
1.0
8.0
1.0
10.0
1.0
9.0
2.0
11.0
2.0
10.0
2.0
10.0
2.0
13.5
1.0
9.0
2.0
11.0
2.0
16.0
2.0
15.0
1.0
10.0
2.0
12.0
T
A
=
0
°
C to
+
70
°
C
V
CC
= +
5.0V
C
L
=
50 pF
Min
Max
90
2.0
8.0
2.0
9.0
1.0
7.5
1.0
7.0
2.0
9.0
1.0
8.0
2.0
9.5
2.0
9.0
2.0
9.0
2.0
12.5
1.0
8.5
2.0
9.5
2.0
15.0
2.0
14.0
1.0
9.5
2.0
11.5
AC Operating Requirements
74F646/74F648
Symbol
Parameter
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
W
(H)
t
W
(L)
Setup Time, HIGH or LOW
Bus to Clock
Hold Time, HIGH or LOW
Bus to Clock
Clock Pulse Width
HIGH or LOW
T
A
= +
25
°
C
V
CC
= +
5.0V
Min
Max
5.0
5.0
2.0
2.0
5.0
5.0
T
A
= −
55
°
C to
+
125
°
C
V
CC
= +
5.0V
Min
Max
5.0
5.0
2.5
2.5
5.0
5.0
T
A
=
0
°
C to
+
70
°
C
V
CC
= +
5.0V
Min
Max
5.0
5.0
2.0
2.0
5.0
5.0
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
Units
ns
ns
ns
www.fairchildsemi.com
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