This part is a kind of semiconductor called MM1631.

Function of this product has I2C Bus Controlled 11-Input 3-Output Audio Switch.

Manufacturers : Mitsumi Electric

Image and pinout :

Some of the text within the PDF file :

MITSUMI I2C BUS - Controlled 11-Input 3-Output Audio Switch MM1631 I2C BUS - Controlled 11-Input 3-Output Audio Switch Monolithic IC MM1631 Outline This is an I2C BUS controlled audio switch developed for use in TVs, PDP and projection TVs. It can switch among 11 audio signal (R, L) lines and 3 output lines. Input switching block design is simple when this IC and MM1630 (video switch) are used as a pair. Features 1. The desired input can be selected for each of the 3 independent output lines. 2. Wide dynamic range (3vrms). 3. Serial control possible through I2C BUS. 4. Forced mute enabled by external pin. 5. Built-in Power Save function. 6. I2C BUS line maintains high impedance when power is off. 7. No output waveform folding with 7.1Vrms input Package SSOP-36A Pi [ ... ]

MM1631 PDF Datasheet Download