This part is a kind of semiconductor called AK5701-A.

Function of this product has digital audio 16bit A/D converter.

Manufacturers : AKM

Image and pinout :

Some of the text within the PDF file :

ASAHI KASEI [AKD5701-A] AKD5701-A AK5701 Evaluation board Rev.1 GENERAL DESCRIPTION AKD5701-A is an evaluation board for the portable digital audio 16bit A/D converter, AK5701. AKD5701-A also has the digital audio interface and can achieve the interface with digital audio systems via opt-connector. „ Ordering guide AKD5701-A --- Evaluation board for AK5701 (Cable for connecting with printer port of IBM-AT compatible PC and control software are packed with this. This control software does not support Windows NT.) FUNCTION • DIT with optical output • RCA connector for an external clock input • 10pin Header for serial control interface AVDD 3.3V Regulator DVDD VD AGND DGND Control Data 10pin Header LIN1/ LIN2 MIC RIN1/ RIN2 AK4114 (DIT) Opt Out EXT/LRCK EXT/BCLK CLOCK GEN 5V AK570 [ ... ]

AK5701-A PDF Datasheet Download