Figure 7-2. Test Circuit Equivalents
VCC
300
300
300
300
H
H'
2/3 VCC
Switches are
closed in the
dominant state
1/3 VCC
L'
L
Ideal test circuit equivalent
4k54
38k
300
300
38k
F1
0.946 V
2/3 VCC
VCC
H
220
Switches are
closed in the
dominant state
270
1/3 VCC
L
4k54
F0
0.946 V
Real test circuit equivalent
2CHL
L
H
CH0
CL0
Capacitance H: CHgnd = CH0 + 2 CHL <= 200 pF/m
Capacitance L: CLgnd = CL0 + 2 CHL <= 200 pF/m
10
B10011S
4749D–AUTO–10/07