Datasheet Summary
MIC/GND Cross-point Switch for CITA and OMTP Mobile Audio Key Application
WAS4736 http://.sh-willsemi.
Descriptions
The WAS4736 is an audio jack detection switch for CITA and OMTP 4-pole accessories. The pin MIC is on audio key side, as WAS4736' O1/O2 is plugged into audio jack of cell phone, it will detect the locations of ground (GND) and microphone (MIC) poles on the audio plug and automatically routes them to the appropriate connections.
SOT-353(SC70-5)
The MIC switch' Ron is 5 Ω (typical) while the Ground switch has a low Ron of 0.5 Ω (typical) to minimize voltage drop across it, preventing undesired increase in ground reference voltage.
As VCC is power-up, WAS4736...