This part is a kind of semiconductor called 25LF020A.

Function of this product has SST25LF020A.

Manufacturers : Silicon Storage Technology

Image and pinout :

Some of the text within the PDF file :

2 Mbit / 4 Mbit SPI Serial Flash SST25LF020A / SST25LF040A SST25LF020A / 040A2Mb / 4Mb Serial Peripheral Interface (SPI) flash memory FEATURES: Data Sheet • Single 3.0-3.6V Read and Write Operations • Serial Interface Architecture – SPI Compatible: Mode 0 and Mode 3 • 33 MHz Max Clock Frequency • Superior Reliability – Endurance: 100,000 Cycles (typical) – Greater than 100 years Data Retention • Low Power Consumption: – Active Read Current: 7 mA (typical) – Standby Current: 8 µA (typical) • Flexible Erase Capability – Uniform 4 KByte sectors – Uniform 32 KByte overlay blocks • Fast Erase and Byte-Program: – Chip-Erase Time: 70 ms (typical) – Sector- or Block-Erase Time: 18 ms (typical) – Byte-Program Time: 14 µs (typical) • Auto Address Increment (A [ ... ]

25LF020A PDF Datasheet Download