74F646SCX(1999) 查看數據表（PDF） - Fairchild Semiconductor
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74F646SCX Datasheet PDF : 9 Pages
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AC Electrical Characteristics 74F646B
Symbol
Parameter
fMAX
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Maximum Clock Frequency
Propagation Delay
Clock to Bus
Propagation Delay
Bus to Bus
Propagation Delay
SBA or SAB to A or B
Enable Time
OE to A or B
Disable Time
OE to A or B
Enable Time
DIR to A or B
Disable Time
DIR to A or B
TA = +25°C
VCC = +5.0V
CL = 50 pF
Min
Max
165
2.5
7.0
3.0
7.5
2.0
6.0
2.0
6.0
2.5
7.5
2.5
7.5
2.5
6.5
2.5
9.0
1.5
6.5
2.0
7.0
2.0
7.0
3.0
9.5
1.5
7.5
2.5
8.5
AC Operating Requirements 74F646B
Symbol
Parameter
tS(H)
tS(L)
tH(H)
tH(L)
tW(H)
tW(L)
Setup Time, HIGH or LOW
Bus to Clock
Hold Time, HIGH or LOW
Bus to Clock
Clock Pulse Width
HIGH or LOW
TA = +25°C
VCC = +5.0V
Min
Max
5.0
5.0
1.5
1.5
5.0
5.0
TA = −55°C to +125°C
VCC = +5.0V
CL = 50 pF
Min
Max
TA = −55°C to +125°C
VCC = +5.0V
Min
Max
TA = 0°C to +70°C
VCC = +5.0V
CL = 50 pF
Min
Max
150
2.5
8.0
3.0
8.0
2.0
7.0
2.0
7.0
2.5
8.5
2.5
8.5
2.5
8.0
2.5
10.0
1.5
7.5
2.0
8.5
2.0
8.5
3.0
10.0
1.5
8.5
2.5
9.5
TA = 0°C to +70°C
VCC = +5.0V
Min
Max
4.0
4.0
1.5
1.5
5.0
5.0
Units
MHz
ns
ns
ns
ns
ns
ns
ns
Units
ns
ns
ns
7
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