The TS3A226AE is an audio headset switch that detects 3- or 4-pole 3.5mm accessories. For
a 4-pole accessory with a microphone, the TS3A226AE also detects the MIC location and routes the
microphone and ground signals automatically. The ground signal is routed through a pair of
low-impedance ground FETs (60mΩ typical), resulting minimal impact on audio cross-talk performance.
The autonomous detection feature allows end users to plug in accessories with different audio pole
configurations into the mobile device and have them operate properly with no added software control
and complexity. The ground FETs of the device are designed to allow FM signal pass-through, making
it possible to use the ground line of the headset as an FM antenna in mobile audio
The TS3A226AE is packaged within a 1.2mm × 1.2mm WCSP package, making it suitable for use
in mobile application.
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