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零件编号
产品描述 (功能)
74LS191M 查看數據表(PDF) - Fairchild Semiconductor
零件编号
产品描述 (功能)
生产厂家
74LS191M
Synchronous 4-Bit Binary Counters
Fairchild Semiconductor
74LS191M Datasheet PDF : 6 Pages
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AC Electrical Characteristics
Symbol
Parameter
From (Input)
To (Output)
f
MAX
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Maximum Clock
Frequency
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Load to
Any Q
Load to
Any Q
Data to
Any Q
Data to
Any Q
Clock to
Ripple Clock
Clock to
Ripple Clock
Clock to
Any Q
Clock to
Any Q
Clock to
Max/Min
Clock to
Max/Min
Up/Down to
Ripple Clock
Up/Down to
Ripple Clock
Down/Up to
Max/Min
Down/Up to
Max/Min
Enable to
Ripple Clock
Enable to
Ripple Clock
R
L
=
2 k
Ω
C
L
=
15 pF
C
L
=
50 pF
Min
Max
Min
Max
20
20
33
43
50
59
22
26
50
62
20
24
24
33
24
29
36
45
42
47
52
65
45
50
45
54
33
36
33
42
33
36
33
42
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
5
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