The SST39VF1681-70-4C-B3KE is a 4-megabit (256K×16) non-volatile CMOS Flash memory that is part of the SuperFlash family from Microchip. The device utilizes advanced circuit design techniques to provide flexibility, speed, and power-saving features, such as fast-read access times as low as 70ns, with minimum power dissipation. The SST39VF1681-70-4C-B3KE features control functions, such as sector protection and erase suspend, that can be read and written with the standard set of commands. The device is available in space-saving 48-lead TSOP (0.3") and 48-ball TFBGA (2.0mm) packages.