In summary, onsemi Flash memory is made up of arrays of floating gate transistors. There are three types of Flash memory: NOR Serial Flash, NOR Parallel Flash, and NAND Flash. Flash memory is non-volatile, offering a read access time as fast as dynamic RAM. Flash memory has a very fast program time but a slower erase time compared to EEPROM. Careful consideration must be used to select the correct Flash memory depending on the application. onsemi offers a broad portfolio to serve a variety of applications.