This part is a kind of semiconductor called 39VF800A.

Function of this product has SST39VF800A.

Manufacturers : Silicon Storage Technology

Image and pinout :

Some of the text within the PDF file :

2 Mbit / 4 Mbit / 8 Mbit (x16) Multi-Purpose Flash SST39LF200A / SST39LF400A / SST39LF800A SST39VF200A / SST39VF400A / SST39VF800A SST39LF/VF200A / 400A / 800A3.0 & 2.7V 2Mb / 4Mb / 8Mb (x16) MPF memories FEATURES: Data Sheet • Organized as 128K x16 / 256K x16 / 512K x16 • Single Voltage Read and Write Operations – 3.0-3.6V for SST39LF200A/400A/800A – 2.7-3.6V for SST39VF200A/400A/800A • Superior Reliability – Endurance: 100,000 Cycles (typical) – Greater than 100 years Data Retention • Low Power Consumption – Active Current: 20 mA (typical) – Standby Current: 3 µA (typical) • Sector-Erase Capability – Uniform 2 KWord sectors • Block-Erase Capability – Uniform 32 KWord blocks • Fast Read Access Time – 45 and 55 ns for SST39LF200A/400A – 55 ns for SST39 [ ... ]

39VF800A PDF Datasheet Download