View sst39lfxxx-vfxxx-03 datasheet:

512 Kbit / 1 Mbit / 2 Mbit / 4 Mbit (x8) Multi-Purpose Flash SST39LF512 / SST39LF010 / SST39LF020 / SST39LF040 SST39VF512 / SST39VF010 / SST39VF020 / SST39VF040 Data Sheet FEATURES: • Organized as 64K x8 / 128K x8 / 256K x8 / 512K x8 • Fast Erase and Byte-Program: 1 – Sector-Erase Time:18 ms typical • Single Voltage Read and Write Operations – Chip-Erase Time: 70 ms typical – 3.0-3.6V for SST39LF512/010/020/040 – Byte-Program Time: 14 µs typical – 2.7-3.6V for SST39VF512/010/020/040 – Chip Rewrite Time: 2 • Superior Reliability 1 second typical for SST39LF/VF512 – Endurance: 100,000 Cycles (typical) 2 seconds typical for SST39LF/VF010 – Greater than 100 years Data Retention 4 seconds typical for SST39LF/VF020 3 8 seconds typical for SST39LF/VF040 • Low Power Consumpti