This part is a kind of semiconductor called 49LF004B.

Function of this product has SST49LF004B.

Manufacturers : Silicon Storage Technology

Image and pinout :

Some of the text within the PDF file :

4 Mbit LPC Firmware Flash SST49LF004B FEATURES: SST49LF004B4Mb LPC Firmware memory Data Sheet • SST49LF004B: 512K x8 (4 Mbit) • Conforms to Intel LPC Interface Specification 1.1 – Supports Single-Byte LPC Memory and Firmware Memory Cycle Types • Flexible Erase Capability – Uniform 4 KByte sectors – Uniform 64 KByte overlay blocks – Chip-Erase for PP Mode Only • Single 3.0-3.6V Read and Write Operations • Superior Reliability – Endurance: 100,000 Cycles (typical) – Greater than 100 years Data Retention • Low Power Consumption – Active Read Current: 6 mA (typical) – Standby Current: 10 µA (typical) • Fast Sector-Erase/Byte-Program Operation – Sector-Erase Time: 18 ms (typical) – Block-Erase Time: 18 ms (typical) – Chip-Erase Time: 70 ms (typical) – [ ... ]

49LF004B PDF Datasheet Download