GENERAL DEscriptION
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.
PIN CONFIGURATIONS
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