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零件编号
产品描述 (功能)
74F779 查看數據表(PDF) - Fairchild Semiconductor
零件编号
产品描述 (功能)
比赛名单
74F779
8-Bit Bidirectional Binary Counter with 3-STATE Outputs
Fairchild Semiconductor
74F779 Datasheet PDF : 7 Pages
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AC Electrical Characteristics
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
Maximum Clock Frequency
Propagation Delay
CP to I/O
n
Propagation Delay
CP to TC
Propagation Delay
CET to TC
Propagation Delay
SN to TC
Output Enable Time
OE to I/O
n
Output Disable Time
OE to I/O
n
AC Operating Requirements
Symbol
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
W
(H)
t
W
(L)
Setup Time
I/O
n
to CP
Hold Time
I/O
n
to CP
Setup Time
S
n
to CP
Hold Time
S
n
to CP
Setup Time
CET to CP
Hold Time
CET to CP
Clock Pulse Width
HIGH or LOW
Parameter
T
A
= +
25
°
C
V
CC
= +
5.0V
C
L
=
50 pF
Min
Typ
Max
100
105
3.0
5.0
8.0
5.0
7.5
11.0
5.0
7.5
9.0
5.0
9.3
10.5
2.5
3.8
5.5
4.5
6.1
8.0
3.5
6.5
12.0
3.5
7.5
12.0
3.0
5.0
7.0
5.0
8.0
10.0
1.0
4.0
6.5
1.0
3.7
6.5
T
A
=
0
°
C to
+
70
°
C
V
CC
= +
5.0V
C
L
=
50 pF
Min
Max
90
3.0
8.5
5.0
11.0
5.0
10.0
5.0
11.5
2.5
6.0
4.5
8.5
3.5
13.0
3.5
13.0
3.0
8.0
5.0
10.5
1.0
7.0
1.0
7.0
Units
ns
ns
ns
ns
ns
ns
T
A
= +
25
°
C
V
CC
= +
5.0V
Min
Max
5.0
5.0
0.0
0.0
9.5
9.5
0.0
0.0
7.0
7.0
0.0
0.0
4.0
4.0
T
A
=
0
°
C to
+
70
°
C
V
CC
= +
5.0V
Min
Max
5.0
5.0
0.0
0.0
10.0
10.0
0.0
0.0
7.0
7.0
0.0
0.0
4.0
4.0
Units
ns
ns
ns
ns
ns
ns
ns
5
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