UM6401 Datasheet, PDF (5/7 Pages) Union Semiconductor, Inc. – 6 Line ESD/EMI Protection for Color LCD Interfaces

UM6401
Where:
d = Diameter of the wire (in)
x = Length of wire loop (in)
y = Breath of wire loop (in)
Figure 3 shows the recommended device layout. The ground pad vias have a diameter of 0.008 inches (0.20 mm)
while the two external vias have a diameter of 0.010 inches (0.250mm). The internal vias are spaced
approximately evenly from the center of the pad. The designer may choose to use more vias with a smaller
diameter (such as 0.005 inches or 0.125mm) since changing the diameter of the via will result in little change in
inductance (i.e. the log function in Equation 2 in highly insensitive to parameter d) .
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