This part is a kind of semiconductor called LA6548.

Function of this product has 4CH Bridge (BTL) Driver for CD.

Manufacturers : Sanyo Semiconductor

Image and pinout :

Some of the text within the PDF file :

LA6548 µ LA6548 Ω µ ∆ ∆ µ µ Ω LA6548 LA6548 ∴ LA6548 * * * LA6548 [ ... ]

LA6548 PDF Datasheet Download