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