This document describes the features and characteristics of the M95040, M95020, and M95010 serial SPI bus EEPROMs, including compatibility with the SPI bus serial interface, supply voltage range, high-speed clock rate, write time, status register, byte and page write functionality, self-timed programming cycle, adjustable size read-only EEPROM area, enhanced ESD protection, more than 1 million erase/write cycles, and more than 40-year data retention.