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74F579 Ver la hoja de datos (PDF) - Fairchild Semiconductor
Número de pieza
componentes Descripción
Lista de partido
74F579
8-Bit Bidirectional Binary Counter with 3-STATE Outputs
Fairchild Semiconductor
74F579 Datasheet PDF : 8 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
PHL
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
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
U/D to TC
Propagation Delay
CEP or CET to TC
Propagation Delay
MR to I/O
n
Propagation Delay
MR to TC
Output Enable Time
CS or PE to I/O
Output Disable Time
CS or PE to I/O
Output Enable Time
OE to I/O
n
Output Disable Time
OE to I/O
n
AC Operating Requirements
Symbol
Parameter
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
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
W
(H)
t
W
(L)
t
W
(L)
t
REC
Setup Time
I/O
n
to CP
Hold Time
I/O
n
to CP
Setup Time
PE, CS or SR to CP
Hold Time
PE, CS or SR to CP
Setup Time
CET or CEP to CP
Hold Time
CET or CEP to CP
Setup Time
U/D to CP
Hold Time
U/D to CP
Clock Pulse Width
HIGH or LOW
MR Pulse Width
Recovery Time
MR to CP
T
A
= +
25
°
C
V
CC
= +
5.0V
C
L
=
50 pF
Min
Typ
Max
70
85
3.0
5.0
7.5
5.0
8.0
11.5
5.0
7.5
11.5
5.0
7.0
11.5
4.5
7.0
9.0
4.5
8.0
9.5
2.5
3.8
6.0
3.5
6.0
8.0
5.0
7.5
10.0
6.5
10.0
13.0
3.0
5.0
8.5
5.5
8.0
10.5
2.0
5.0
8.5
2.0
4.5
8.0
3.0
5.0
8.0
5.0
8.0
11.0
2.0
4.0
6.5
2.0
4.0
6.0
T
A
=
0
°
C to
+
70
°
C
V
CC
= +
5.0V
C
L
=
50 pF
Min
Max
80
3.0
8.0
5.0
11.5
5.0
12.0
5.0
12.0
4.5
10.0
4.5
10.0
2.5
6.5
3.5
8.5
5.0
10.0
6.5
13.5
3.0
9.0
5.5
11.5
2.0
9.0
2.0
8.5
3.0
8.5
5.0
12.0
2.0
6.5
2.0
6.5
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
T
A
= +
25
°
C
V
CC
= +
5.0V
Min
Typ
Max
4.0
4.0
0.0
0.0
9.5
9.5
0.0
0.0
6.5
9.5
0.0
0.0
9.0
9.0
0.0
0.0
4.5
4.5
3.0
4.0
T
A
=
0
°
C to
+
70
°
C
V
CC
= +
5.0V
Min
Max
4.0
4.0
0.0
0.0
9.5
9.5
0.0
0.0
6.5
9.5
0.0
0.0
9.5
9.5
0.0
0.0
4.5
4.5
3.0
4.0
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
5
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