The GLS37VF020 is a 256K x8 CMOS, Many-Time Programmable (MTP), low cost flash; 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. The GLS37VF020 can be electrically erased and programmed at least 1000 times using an external programmer, e.g., to change the contents of devices in inventory. The GLS37VF020 must to be erased prior to programming. This device conforms to JEDEC standard pinouts for byte-wide flash memories.