This part is a kind of semiconductor called BA6397FP.

Function of this product has 4-channel BTL driver for CD players.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Optical disc ICs 4-channel BTL driver for CD players BA6397FP The BA6397FP is a 4-channel BTL driver for CD player motors and actuators. The 5V regulator and internal standard operational amplifier make this IC suited to a broad range of applications. FApplications CD players and CD-ROM drives FFeatures 1) HSOP 28-pin package allows for miniaturization of applications. 2) Low number of external components. 3) Driver gain is adjustable with a single attached resistor. FAbsolute maximum ratings (Ta = 25_C) 4) Internal 5V regulator. (requires attached PNP transistor) 5) Internal standard operational amplifier. 6) Internal thermal shutdown circuit. FRecommended operating conditions (Ta = 25_C) 332 Optical disc ICs BA6397FP FBlock diagram 333 Optical disc ICs FPin descriptions BA639 [ ... ]

BA6397FP PDF Datasheet Download