This part is a kind of semiconductor called AN18164B.
Function of this product has Car Radio FM/AM tuner IC built-in PLL synthesizer.
Manufacturers : Panasonic Semiconductor
Image and pinout :

Some of the text within the PDF file :
DATA SHEET Part No. Package Code No. AN18164B LQFP048-P-0707A Publication date: May 2007 SDC00067AEB 1 AN18164B Contents Overview ………………………………………………….…………………………………………………………. 3 Features ………………………………………………….…………………………………………………………. 3 Applications ……………………………………………….…………………………………………………………. 3 Package ………………………………………………….…………………………………………………………. 3 Type ……………………………………………………….………………�� [ ... ]
AN18164B PDF Datasheet Download
