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In addition to detection, Detection 3- or 4-Pole Audio Jack the FSA8008/A features an integrated MIC switch that allows Send/End Key Pressed the processor to configure the audio jack. The architecture is FSA8008 designed to allow common third-party headphones to be Decreased Timing Functionality used for listening to music from mobile handsets, personal FSA8008A for Sensitive media players, and portable peripheral devices. Send/End Keys Switch Type MIC Determines 3- or 4-Pole Audio Jacks V 2.5 to 4.4 V DD Removes Audio Jack Pop-n-Click Caused by MIC Bias V 1.6 to V IO DD Detects Audio Jack Accessories: THD (MIC) 0.01% Typical - Standard Headphones ESD (Air Gap) 15 kV - Headsets with MIC Operating Temperature -40C to 85C - Send / End Button Presses 10-Lead UMLP Package 1.4 x 1.8 x 0.5 mm, Integrates a MIC Switch for 4-Pole Configuration 0.4 mm Pitch FSA8008 KC Related Resources Top Mark FSA8008A KD FSA8008/FSA8008A Demonstration Board FSA8008UMX Ordering Information FSA8008AUMX Applications 3.5 mm and 2.5 mm Audio Jacks Cellular Phones, Smartphones MP3 and PMP Typical Application 2.5 to 4.4V 1.6 to V DD Baseband V VIO DD Processor VDD 0.5A Normally Open LOW = plugged (NO) Switch DET HIGH = unplugged GPIO1 EN J DET GPIO2 J POLE L R GND MIC GPIO3 S/E GPIO4 Oscillator 1 2 3 4 and Logic Audio RMIC MIC J MIC MIC Bias S MIC COMP CMIC L SPKR HIGH=>J MIC=0V LOW=>J MIC>0.2V GND R SPKR - Figure 1. Mobile Phone Example 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA8008 / FSA8008A Rev. 1.9 16-32W 16-32 W