Fairchild FSA8058 Audio Jack Detection & Configuration Switch
Fairchild's FSA8058 Audio Jack Detection & Configuration Switch is an audio jack detection switch for 3-pole and 4-pole accessories. The FSA8058 features moisture sensing, which prevents false positive detection of accessories in the audio jack. The FSA8058 also features an integrated MIC switch that allows a processor to configure attached accessories. The architecture is designed to allow common third-party headphones to be used for listening to music from mobile handsets, personal media players, and portable peripheral devices. Features include preventing false detection of accessories in the audio jack when moisture is present, removed audio jack pop and click caused by MIC bias, detect audio jack accessories (standard headphones and send/end button presses), and integrates a MIC switch for 4-pole configuration.