This part is a kind of semiconductor called AK4958.

Function of this product has 24bit Stereo CODEC.

Manufacturers : AKM

Image and pinout :

Some of the text within the PDF file :

[AK4958] AK4958 24bit Stereo CODEC with MIC/SPK/VIDEO-AMP & LDO GENERAL DESCRIPTION The AK4958 is a 24-bit stereo CODEC with a microphone, speaker, video amplifiers and LDO. The input circuits include a microphone amplifier and the output circuits include a speaker amplifier. It is suitable for portable application with recording/playback function. A one channel composite In/Out video amplifier is also integrated. The AK4958 is available in a small 32-pin BGA (3.5mm x 3.5mm, 0.5mm pitch: AK4958EG) and a 25-pin CSP (2.2mm x 2.2mm, 0.4mm pitch: AK4958ECB) packages saving mounting area on the board. FEATURES 1. Recording Functions  Analog Input (AK4958EG) Stereo Single-ended input with two Selectors (AK4958ECB) Stereo Single-ended input  Microphone Amplifier (+30dB, +25dB, +21dB, +18dB [ ... ]

AK4958 PDF Datasheet Download