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Protects Electronic Equipment Against Electrostatic Discharge!
Commercializing Silicon ESD Protection Device

July 9, 2009

Murata Manufacturing Co., Ltd.
President/ Statutory Representative Director: Tsuneo Murata

Overview

Murata Manufacturing Co., Ltd. has commercialized silicon ESD^* protection device for protecting electronic equipment against electrostatic discharge.

This ESD protection device realizes higher level of ESD characteristics and repetition durability compared with the previous product through Murata’s own circuit design.

The lineup includes 2-element, 4-element and 6-element types in addition to the 1-element type. In September 2009, the 10-element type and built-in filter function type are scheduled to join the lineup. Further, ultra low-capacitance type using ceramics is underway to fortify the ESD protection device lineup.

Murata will continue to develop ESD protection devices and aim at offering total solution for ESDs.

* ESD
Acronym for Electrostatic Discharge. Also indicates equipment damage caused by such discharge.

Background

Larger number of features and finer wiring in ICs for electronic equipment nowadays require measures against electrostatic discharge. It is now necessary to install ESD protection devices for all electronic equipment including mobile phones and note-size PCs. However, existing solutions had problems with insufficient ESD suppression characteristics, and degraded ESD suppression characteristics after repeated ESDs. Murata has solved these problems by enhancing ESD suppression characteristics and repetition durability through original circuit design, to succeed in commercialization of the new ESD protection device.

Features

• High ESD suppression characteristics: Less than 100V output when the input voltage is 15kV
• High repetition durability: 1000 cycles at 8kV contact voltage
• Filter attenuation is -40dB at 800MHz to 2GHz
• Ultra-low capacitance (0.05pF) for the ceramic model

Applications

For all electronic equipment including mobile phones and note-size PCs

Line Up

• Arrays: 2-/4-/6-element models (mass produced models), and 10-element model (development model)
  High density is realized by array construction
• Built-in filter function type (development model)
  Noise removal function can be added.
• Ultra-low capacitance type (development model)
  Ultra-low capacitance type (0.05pF) was developed for high frequency (antenna) applications by replacing silicon with ceramic

※Refer to the lineup detail.

Part Number

LXES series

Characteristics Diagram

IEC-61000-4-2 Waveform when 8kV is applied directly

Without ESD protection device

With ESD protection device (LXES1TBAA4-005)

Electric Characteristic

LXES1TBAA2-004

External Size

Silicon

1-element	2-element	4-element
T=0.55mmMAX	T=0.55mmMAX	T=0.60mmMAX

Built-in filter function

10-element
T=0.67mmMAX

Ceramic

1-element
T=0.4mmMAX

Production

3 million units per month in summer 2009 are planning.
(30 million units per month in summer 2010 are planning.)

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