This part is a kind of semiconductor called AN18165B.
Function of this product has FM-MPX demodulation / FM noise canceller.
Manufacturers : Panasonic Semiconductor
Image and pinout :

Some of the text within the PDF file :
DATA SHEET Part No. Package Code No. AN18165B SSOP024-P-0300E Publication date: May 2007 SDC00068AEB 1 AN18165B Contents Overview ………………………………………………….…………………………………………………………. 3 Features ………………………………………………….…………………………………………………………. 3 Applications ……………………………………………….…………………………………………………………. 3 Package ………………………………………………….…………………………………………………………. 3 Type ……………………………………………………….………………�� [ ... ]
AN18165B PDF Datasheet Download
