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http://www.union-ic.com

Rev.01 Apr.2008

1/6

UM4401

4 Line ESD/EMI Protection for Color LCD Interfaces

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

EMI Filtering and ESD Protection for

Data Lines

Wireless Phones

Handheld Products

Notebook Computers

LCD Displays

EMI/RFI Filter with Integrated TVS for

ESD Protection

ESD Protection to IEC 61000-4-2 (ESD)

Level 4, ±15kV (air), ±8kV (contact)

25dB Minimum Attenuation: 800MHz to

2.5GHz

Working Voltage: 5V

Resistor: 100Ω ±15%

Solid-state Technology

DFN8 Package: 2.1mm x 1.6 mm

Moisture Sensitivity Level 1

Pin Configurations

Top View

Cd

Cd

8

2

5

7

1

Cd

Cd

Cd

Cd

6

Cd

3

Cd

4

M: Monthly Code

UM4401

DFN8 2.1×1.6