The SST25VF040B-50-4I-QAF is a 4 megabit (512KB) serial flash memory device from Microchip. It features a 4-wire serial interface, 2.7 to 3.6 V operating voltage range, 1.4 V low-voltage read and write operation, both single-cycle and multiple-cycle access modes, sector/block erase command set, and low-power suspend mode. The SST25VF040B-50-4I-QAF's operating temperature range is -40 °C to +85 °C and its package size is 8-SOIC (150 mil).