TI TS3A225E Autonomous Audio Headset Switch
Texas Instruments TS3A225E is an audio headset switch device that 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 TI TAS3A225E audio headset switch detects a certain configuration, the device automatically connects the microphone line to the appropriate pin. TI TS3A225E 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. TS3A225E provides two internal low resistance (<100mΩ) FET switches for ground shorting. The device is ideal for use in mobile phones, tablet PCs, and notebook computers.