This reference design is for autonomous audio headset switch applications. Some audio headsets have integrated analog microphones. The GND and MIC connections on the audio jack connector may be swapped depending on the manufacturer. This design has the ability to detect the presence of an analog microphone on the audio headset, detect the pin configuration of the MIC and Ground pins, and switch the system MIC pin to the correct audio jack connector. This allows the customer's audio solution to work seamlessly with headsets from all manufacturers.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Design file that contains information on physical board layer of design PCB
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