UM4701 Datasheet, PDF (6/11 Pages) Union Semiconductor, Inc. – Multi-line ESD/EMI Protection for Color LCD Interfaces

UM4701/4711/8701/8711
Ground Connection Recommendation
Parasitic inductance (L) present in the board layout will affect the filtering performance of the
device. As frequency (f) increases, the effect of the inductance becomes more dominant. This
effect is given by Equation 1.
Pin Identification & Configuration
Pin
Identification
1-4
Input Lines
5-8
Output Lines
Center Tab
Ground
Equation 1: The Impedance of an Inductor at
Frequency XLF
UM4701/UM4711
XLF(L,f ) = 2×л×f ×L
Where:
L= Inductance (H)
f = Frequency (Hz)
Pin Identification & Configuration
Pin
Identification
1-8
Input Lines
9 - 16
Output Lines
Center Tab
Ground
Equation 1: The Impedance of an Inductor at
Frequency XLF
XLF(L, f ) = 2×л×f ×L
Where:
L= parasitic inductance in the PCB (H)
f = Frequency (Hz)
UM8701/UM8711
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http://www.union-ic.com Rev.01 Aug.2012
6/11