This part is a kind of semiconductor called D71055.

Function of this product has UPD71055.

Manufacturers : NEC

Image and pinout :

Some of the text within the PDF file :

http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com [ ... ]

D71055 PDF Datasheet Download