AMD/Spansion compatible command set The SST39VF6402B device is a 4M x16, CMOS Multi-Purpose Flash Plus (MPF+) manufactured with SST proprietary, high performance CMOS SuperFlash technology. The split-gate cell design and thick-oxide tunneling injector attain better reliability and manufacturability compared with alternate approaches. This devices conforms to JEDEC standard pinouts for x16 memories and is command set compatible with Flash devices that support the AMD/Spansion command set, enabling customers to save time and resources in implementation.