74F161A 查看數據表（PDF） - Fairchild Semiconductor
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74F161A Datasheet PDF : 8 Pages
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AC Electrical Characteristics
Symbol
Parameter
fMAX
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPHL
tPHL
Maximum Count Frequency
Propagation Delay
CP to Qn (PE Input HIGH)
Propagation Delay
CP to Qn (PE Input LOW)
Propagation Delay
CP to TC
Propagation Delay
CET to TC
Propagation Delay
MR to Qn (74F161A)
Propagation Delay
MR to TC (74F161A)
TA = +25°C
VCC = +5.0V
CL = 50 pF
Min
Typ
Max
100
120
3.5
5.5
7.5
3.5
7.5
10.0
4.0
6.0
8.5
4.0
6.0
8.5
5.0
10.0
14.0
5.0
10.0
14.0
2.5
4.5
7.5
2.5
4.5
7.5
5.5
9.0
12.0
TA = −55°C to +125°C
VCC = +5.0V
CL = 50 pF
Min
Max
75
3.5
9.0
3.5
11.5
4.0
10.0
4.0
10.0
5.0
16.5
5.0
15.5
2.5
9.0
2.5
9.0
TA = 0°C to +70°C
VCC = +5.0V
CL = 50 pF
Min
Max
90
3.5
8.5
3.5
11.0
4.0
9.5
4.0
9.5
5.0
15.0
5.0
15.0
2.5
8.5
2.5
8.5
5.5
14.0
5.5
13.0
4.5
8.0
10.5
4.5
12.5
4.5
11.5
AC Operating Requirements
Symbol
Parameter
tS(H)
tS(L)
tH(H)
tH(L)
tS(H)
tS(L)
tH(H)
tH(L)
tS(H)
tS(L)
tH(H)
tH(L)
tW(H)
tW(L)
tW(H)
tW(L)
tW(L)
tREC
Setup Time, HIGH or LOW
Pn to CP
Hold Time, HIGH or LOW
Pn to CP
Setup Time, HIGH or LOW
PE or SR to CP
Hold Time, HIGH or LOW
PE or SR to CP
Setup Time, HIGH or LOW
CEP or CET to CP
Hold Time, HIGH or LOW
CEP or CET to CP
Clock Pulse Width (Load)
HIGH or LOW
Clock Pulse Width (Count)
HIGH or LOW
MR Pulse Width, LOW
(74F161A)
Recovery Time
MR to CP (74F161A)
TA = +25°C
VCC = +5.0V
Min
Max
5.0
5.0
2.0
2.0
11.0
8.5
2.0
0
11.0
5.0
0
0
5.0
5.0
4.0
6.0
5.0
6.0
TA = −55°C to +125°C
VCC = +5.0V
Min
Max
5.5
5.5
2.5
2.5
13.5
10.5
3.6
0
13.0
6.0
0
0
5.0
5.0
5.0
8.0
5.0
TA = 0°C to +70°C
VCC = +5.0V
Min
Max
5.0
5.0
2.0
2.0
11.5
9.5
2.0
0
11.5
5.0
0
0
5.0
5.0
4.0
7.0
5.0
6.0
6.0
Units
MHz
ns
ns
ns
ns
ns
Units
ns
ns
ns
ns
ns
ns
ns
5
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