This part is a kind of semiconductor called TC58TEG5DCJTA00.
Function of this product has NAND memory Toggle DDR1.0.
Manufacturers : Toshiba
Image and pinout :

Some of the text within the PDF file :
TOSHIBA CONFIDENTIAL TC58TEG5DCJTAx0 TOSHIBA NAND memory Toggle DDR1.0 Technical Data Sheet Rev. 0.2 2012 – 03 – 01 TOSHIBA Semiconductor & Storage Products Memory Division 0 TENTATIVE 2012-03-01C TOSHIBA CONFIDENTIAL TC58TEG5DCJTAx0 CONTENTS 1. INTRODUCTION ............................................................................................................................................. 5 1.1. General Description ...................................................................................................................................... 5 1.2. Definitions and Abbreviations...................................................................................................................... 5 1.3. Features ......................................................... [ ... ]