This part is a kind of semiconductor called A29040.

Function of this product has 512K X 8 Bit CMOS 5.0 Volt-only/ Uniform Sector Flash Memory.

Manufacturers : AMIC Technology

Image and pinout :

Some of the text within the PDF file :

A29040A Series 512K X 8 Bit CMOS 5.0 Volt-only, Preliminary Features n 5.0V ± 10% for read and write operations n Access times: - 55/70/90 (max.) n Current: - 20 mA typical active read current - 30 mA typical program/erase current - 1 µA typical CMOS standby n Flexible sector architecture - 8 uniform sectors of 64 Kbyte each - Any combination of sectors can be erased - Supports full chip erase - Sector protection: A hardware method of protecting sectors to prevent any inadvertent program or erase operations within that sector n Embedded Erase Algorithms - Embedded Erase algorithm will automatically erase the entire chip or any combination of designated sectors and verify the erased sectors - Embedded Program algorithm automatically writes and verifies bytes at specified addresses Typical [ ... ]

A29040 PDF Datasheet Download