The TS3A26746E is a 2 × 2 cross-point switch that is used to interchange the Ground and
MIC connections on a headphone connector. The Ground switch has an ultra low
RON of <0.1Ω to minimize voltage drop across it, preventing undesired
increases in headphone ground reference voltage. The switch state is controlled via the SEL input.
When SEL=High, GND is connected to RING2 and MIC is connected to SLEEVE. When SEL=Low, GND is
connected to SLEEVE and MIC is connected to RING2. An internal 100k pull-up resistor on the SEL
input sets the default state of the switch.
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