This part is a kind of semiconductor called TDA1543A.

Function of this product has Dual 16-bit DAC.

Manufacturers : Philips

Image and pinout :

Some of the text within the PDF file :

The S6 version is a relaxed version of the TD1543A. The differeces in performance between the S6 selection and the standard version are limited to only three parameters [ ... ]

TDA1543A PDF Datasheet Download