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UM4401 Datasheet, PDF (1/6 Pages) Union Semiconductor, Inc. – 4 Line ESD/EMI Protection for Color LCD Interfaces
UM4401
4 Line ESD/EMI Protection for Color LCD Interfaces
UM4401 DFN8 2.1 X 1.6
General Description
The UM4401 is a low pass filter array with integrated TVS diodes. It is designed to suppress
unwanted EMI/RFI signals and provide electrostatic discharge (ESD) protection in portable
electronic equipment. This state-of-the-art device utilizes silicon-avalanche technology for
superior clamping performance and DC electrical characteristics. It has been optimized for
protection of color LCD panels in cellular phones and other portable electronics.
The device consists of four identical circuits comprised of TVS diodes for ESD protection, and a
RC network for EMI filtering. A series resistor value of 100Ω and a capacitance value of 10pF are
used to achieve 25dB minimum attenuation from 800 MHz to 2.5GHz. The TVS diodes provide
effective suppression of ESD voltages in excess of ±15kV (air discharge) and ±8kV (contact
discharge) per IEC 61000-4-2, level 4.
The UM4401 is in a 8-pin, RoHS compliant DFN8 package. It measures 2.1mm x 1.6mm. The
leads are spaced at a pitch of 0.5mm and are finished with lead-free Ni Pd. The small package
makes it ideal for use in portable electronics such as cell phones, digital still cameras, and PDAs.
Applications
Features
z EMI Filtering and ESD Protection for z EMI/RFI Filter with Integrated TVS for
Data Lines
z Wireless Phones
z Handheld Products
z Notebook Computers
z LCD Displays
ESD Protection
z ESD Protection to IEC 61000-4-2 (ESD)
Level 4, ±15kV (air), ±8kV (contact)
z 25dB Minimum Attenuation: 800MHz to
2.5GHz
z Working Voltage: 5V
z Resistor: 100Ω ±15%
z Typical Capacitance: 10pF (VR = 2.5V)
z Solid-state Technology
z DFN8 Package: 2.1mm x 1.6 mm
z Moisture Sensitivity Level 1
Pin Configurations
Top View
1
8
Cd Cd
2
7
Cd Cd
3
6
Cd Cd
4
5
Cd Cd
M: Monthly Code
UM4401
DFN8 2.1×1.6
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http://www.union-ic.com Rev.01 Apr.2008
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