74F191SCX 查看數據表（PDF） - Fairchild Semiconductor
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74F191SCX Datasheet PDF : 7 Pages
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AC Electrical Characteristics
Symbol
Parameter
fMAX
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Maximum Count Frequency
Propagation Delay
CP to Qn
Propagation Delay
CP to TC
Propagation Delay
CP to RC
Propagation Delay
CE to RC
Propagation Delay
U/D to RC
Propagation Delay
U/D to TC
Propagation Delay
Pn to Qn
Propagation Delay
PL to Qn
Propagation Delay
Pn to TC
Propagation Delay
Pn to RC
Propagation Delay
PL to TC
Propagation Delay
PL to RC
TA = +25°C
VCC = +5.0V
CL = 50 pF
Min
Typ
Max
100
125
3.0
5.5
7.5
5.0
8.5
11.0
6.0
10.0
13.0
5.0
8.5
11.0
3.0
5.5
7.5
3.0
5.0
7.0
3.0
5.0
7.0
3.0
5.5
7.0
7.0
11.0
18.0
5.5
9.0
12.0
4.0
7.0
10.0
4.0
6.5
10.0
3.0
4.5
7.0
6.0
10.0
13.0
5.0
8.5
11.0
5.5
9.0
12.0
5.0
14.0
6.5
13.0
6.5
19.0
6.0
14.0
8.0
16.5
6.0
13.5
10.0
20.0
9.0
15.5
TA = −55°C to +125°C
VCC = +5.0V
CL = 50 pF
Min
Max
75
3.0
9.5
5.0
13.5
6.0
16.5
5.0
13.5
3.0
9.5
3.0
9.0
3.0
9.0
3.0
9.0
7.0
22.0
5.5
14.0
4.0
13.5
4.0
12.5
3.0
9.0
6.0
16.0
5.0
13.0
5.5
14.5
TA = 0°C to +70°C
VCC = +5.0V
CL = 50 pF
Min
Max
90
3.0
8.5
5.0
12.0
6.0
14.0
5.0
12.0
3.0
8.5
3.0
8.0
3.0
8.0
3.0
8.0
7.0
20.0
5.5
13.0
4.0
11.0
4.0
11.0
3.0
8.0
6.0
14.0
5.0
12.0
5.5
13.0
5.0
15.0
6.0
14.0
6.5
20.0
6.0
15.0
8.0
17.5
6.0
14.5
10.0
21.0
9.0
16.0
AC Operating Requirements
Symbol
Parameter
tS(H)
tS(L)
tH(H)
tH(L)
tS(L)
tH(L)
tS(H)
tS(L)
tH(H)
tH(L)
tW(L)
tW(L)
tREC
Setup Time, HIGH or LOW
Pn to PL
Hold Time, HIGH or LOW
Pn to PL
Setup Time LOW
CE to CP
Hold Time LOW
CE to CP
Setup Time, HIGH or LOW
U/D to CP
Hold Time, HIGH or LOW
U/D to CP
PL Pulse Width LOW
CP Pulse Width LOW
Recovery Time
PL to CP
TA = +25°C
VCC = +5.0V
Min
Max
4.5
4.5
2.0
2.0
10.0
TA = −55°C to +125°C
VCC = +5.0V
Min
Max
6.0
6.0
2.0
2.0
10.5
TA = 0°C to +70°C
VCC = +5.0V
Min
Max
5.0
5.0
2.0
2.0
10.0
0
0
0
12.0
12.0
12.0
12.0
12.0
12.0
0
0
0
0
0
0
6.0
8.5
6.0
5.0
7.0
5.0
6.0
7.5
6.0
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
Units
ns
ns
ns
ns
ns
ns
5
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