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This literature is subject to all applicable copyright laws and is not for resale in any manner.FSA8029 Audio Jack Send / End Detection with MIC / Video Switch March 2012 FSA8029 Audio Jack Send / End Detection with MIC / Video Switch Description Features The FSA8029 is an audio jack microphone / video switch for Accessory Plug-In 3- or 4-pole accessories with send / end (S/E) detection. In Detection 3- or 4-Pole Audio Jack addition to detection, the FSA8029 features an integrated Send / End Key Pressed microphone / video switch that allows the processor to Switch Type Microphone & Video configure the audio jack. The architecture is designed to allow common third-party headphones to be used for V 2.5 to 4.3V DD listening to music from mobile handsets, personal media THD (MIC) 0.01% Typical players, and portable peripheral devices. ESD (Air Gap) 16kV Determines when Send / End Button Key is Pressed Operating Temperature -40C to 85C Integrates a MIC / Video Switch for 4-Pole Configuration 10-Lead UMLP Package 1.4x1.8x0.5mm, 0.4mm Pitch Reduces Pop / Click Caused by Microphone Bias Top Mark KS Ordering Information FSA8029UMX Related Resources For samples and questions, please contact: Applications Analog.Switch fairchildsemi.com. FSA8029 Demonstration Board 3.5mm and 2.5mm Audio Jacks Cellular Phones, Smartphones MP3 and PMP Typical Application Baseband Processor VIO GPIO 2.8V VIO VIO VDD R VDD Open Drain Output Enable S/E1 REF GPIO1 Open Drain Output + S/E2 GPIO2 L R GND MIC TTL Level Input SEL - GPIO3 1 2 3 4 + Audio 0.07x CODEC R MIC - VDD MIC MIC Bias VID J MIC MIC C MIC L SPKR GND R SPKR Applications Processor Video Out Figure 1. Mobile Phone Example 2010 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA8029 Rev. 1.0.1 16-32 16-32 NC, S/E Key NO, S/E Key