1FEATURES

• VDD Range = 2.7 V to 4.5 V

• Break Before Make Stereo Jack Switches

• Ron for Ground FET Switches

– WCSP Package: 70 mΩ

– QFN Package: 100 mΩ

• Autonomous Detection of GND and MIC

Connections

• Detection Triggered by I2C or External Trigger

Pin

• HDA Compatible MIC Present Indicator

• 1.8V Compatible I2C Switch Control

• ESD Performance Tested Per JESD 22:

– 2000-V Human-Body Model (A114-B, Class

II)

– 500-V Charged-Device Model (C101)

• ESD Performance (SLEEVE, RING2, TIP)

– ±8-kV Contact Discharge (IEC 61000-4-2)

APPLICATIONS

• Mobile Phones/ Tablet PCs

• Notebook Computers

DESCRIPTION

The TS3A225E is an audio headset switch device. The device detects the presence of an analog

microphone and switches a system analog

microphone pin between different connectors in an

audio stereo jack. The microphone connection in a

stereo connector can be swapped with the ground

connection depending on manufacturer. When the

TS3A225E detects a certain configuration, the device

automatically connects the microphone line to the

appropriate pin. The device also reports the presence

of an analog microphone on an audio stereo jack.

In some systems, it is desirable to connect the stereo

jack pin to ground. The TS3A225E provides two

internal low resistance (<100mΩ) FET switches for

ground shorting.