The SGM2549D senses ground pole and automatically selects switches accordingly in either the driver side or the headset side, with no need of any external control input. If a plug-in of the earphone is misplaced, it will keep SGM2549D trying periodically until a correct microphone pole is found. It consumes 1.3μA when a microphone is identified.
SGM2549D is available in Green UTDFN-1.5×2-6L and SOT-23-6 packages. It is rated over the -40℃ to +85℃ temperature range.
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FEATURES
- Simple and Dedicated for One Purpose
- SGMICRO’s Patented Circuit w/o IP Conflict
- Autonomous Fixing CTIA/OMTP Ground Path
- Keep MIC Low When a 3-Pole Headset Identified
- Applicable to Both Driver Side and Earphone Side
- Low Ground Path Impedance
- Ground Path Voltage Drop Sensing
- Powered by Local Source or External Parasitics
- Ground Pin FM Antenna Path
- -40℃ to +85℃ Operating Temperature Range
- SGM2549D is Available in Green UTDFN-1.5×2-6L and SOT-23-6 Packages
APPLICATIONS
Phones/Pads/Computers/Media Players
Earphones/Phone-Jack Key/Phone-Jack Button
