This part is a kind of semiconductor called PA28F400B5B80.

Function of this product has SMART 5 BOOT BLOCK FLASH MEMORY FAMILY 2/ 4/ 8 MBIT.

Manufacturers : Intel Corporation

Image and pinout :

Some of the text within the PDF file :

E n n n n n ADVANCE INFORMATION SMART 5 BOOT BLOCK FLASH MEMORY FAMILY 2, 4, 8 MBIT 28F200B5, 28F400B5, 28F800B5, 28F004B5 SmartVoltage Technology  Smart 5 Flash: 5 V Reads, 5 V or 12 V Writes  Increased Programming Throughput at 12 V VPP Very High-Performance Read  2-, 4-Mbit: 60 ns Access Time  8-Mbit: 70 ns Access Time x8 or x8/x16-Configurable Data Bus Low Power Consumption  Max 60 mA Read Current at 5 V  Auto Power Savings: <1 mA Typical Standby Current Optimized Array Blocking Architecture  16-KB Protected Boot Block  Two 8-KB Parameter Blocks  96-KB and 128-KB Main Blocks  Top or Bottom Boot Locations Extended Temperature Operation  –40 °C to +85 °C Industry-Standard Packaging  40, 48-Lead TSOP, 44-Lead PSOP n n Extended Block Erase Cycli [ ... ]

PA28F400B5B80 PDF Datasheet Download