The FM31L278-GTR with Supervisory Circuits 256K w/RTC Pwr Mon WDT Bat Sw PF from Infineon is a System Management Bus (SMBus) compliant, non-volatile memory with integrated real-time clock (RTC). The 256Kb of non-volatile memory includes 256K x 8 bits of EEPROM and 128 x 4 bits of User Code memory, which is protected by an integrated EEPROM write protection mechanism. It also features an integrated peripheral power monitor, battery switch, temperature sensor, and watchdog timer (WDT). This device is ideal for applications requiring high accuracy time keeping and event logging.