The MICROCHIP TECH SST26VF064B-104I/MN is a 64 Mbit Serial Quad I/O (SQI) flash-memory device that features a six-wire, 4-bit I/O interface that allows for low-power, high-performance operation in a low pin-count package. It also supports full command-set compatibility to traditional Serial Peripheral Interface (SPI) protocol. System designs using SQI flash devices occupy less board space and ultimately lower system costs.