This part is a kind of semiconductor called PS2251-33.

Function of this product has USB 2.0 Flash Controller.

Manufacturers : Phison Electronics Corporation

Image and pinout :

Some of the text within the PDF file :

No.1, Qun Yi Road, Jhunan, Miaoli, Taiwan 350, R.O.C. Tel : +886-37-586-896 Email : sales@phison.com Fax : +886-37-587-868 kspua@phison.com Phison Electronics Corporation USB 2.0 Flash Controller Specification PS2251-33 http:/// Version 1.2 All rights are strictly reserved. Any portion of this paper shall not be reproduced, copied, or translated to any other forms without permission from Phison Electronics Corporation. Document Number : S-09003 Phison Electronics Corporation No.1, Qun Yi Road, Jhunan, Miaoli, Taiwan 350, R.O.C. Tel : +886-37-586-896 Fax : +886-37-587-868 Table of Contents A. B. C. D. General Description 1 Controller Features [ ... ]

PS2251-33 PDF Datasheet Download