74VHC157 Просмотр технического описания (PDF) - Fairchild Semiconductor
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74VHC157 Datasheet PDF : 7 Pages
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AC Electrical Characteristics
Symbol
Parameter
VCC
TA = 25°C
TA = −40°C to +85°C
Units
(V)
Min
Typ
Max
Min
Max
Conditions
tPLH
Propagation Delay
3.3 ± 0.3
tPHL
In to Zn
5.0 ± 0.5
tPLH
Propagation Delay
3.3 ± 0.3
tPHL
S to Zn
5.0 ± 0.5
tPLH
Propagation Delay
3.3 ± 0.3
tPHL
E to Zn
5.0 ± 0.5
CIN
Input Capacitance
CPD
Power Dissipation
Capacitance
6.2
9.7
1.0
11.5
ns
CL = 15 pF
8.7
13.2
1.0
15.0
CL = 50 pF
4.1
6.4
1.0
7.5
ns
CL = 15 pF
5.6
8.4
1.0
9.5
CL = 50 pF
8.4
13.2
1.0
15.5
ns
CL = 15 pF
10.9
16.7
1.0
19.0
CL = 50 pF
5.3
8.1
1.0
9.5
ns
CL = 15 pF
6.8
10.1
1.0
11.5
CL = 50 pF
8.7
13.6
1.0
16.0
ns
CL = 15 pF
11.2
17.1
1.0
19.5
CL = 50 pF
5.6
8.6
1.0
10.0
ns
CL = 15 pF
7.1
10.6
1.0
12.0
CL = 50 pF
4
10
10
pF VCC = Open
20
pF (Note 4)
Note 4: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average
operating current can be obtained by the equation: ICC (opr.) = CPD * VCC * fIN + ICC.
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