This part is a kind of semiconductor called MC6019.

Function of this product has 3W Stereo Audio Power Amplifier.

Manufacturers : MegaPower Semiconductor

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MC6019 3W Stereo Audio Power Amplifier with Advanced DC Volume Control General Description The MC6019 is a stereo audio power amplifier that drives 3 W/channel of continuous RMS power into a 3-W load. Advanced dc volume control minimizes external components and allows BTL (speaker) volume control and SE (headphone) volume control. Notebook and pocket PCs benefit from the integrated feature set that minimizes external components without sacrificing functionality. To simplify design, the speaker volume level is adjusted by applying a dc voltage to the VOLUME Terminal, Likewise, the delta between speaker volume and headphone volume can be adjusted by applying a dc voltage to the SEDIFF terminal. To avoid an unexpected high volume level through the headphones, a third terminal, SEMAX, limits [ ... ]

MC6019 PDF Datasheet Download