The FM31276-GTR is a 64-Kbit processor companion with F-RAM, integrating nonvolatile memory, real-time clock, and processor supervisory functions in a 14-pin SOIC package. It delivers 100 trillion read/write cycles, 151-year data retention at 65°C, and operates from 4.0 V to 5.5 V across -40°C to +85°C. Features include programmable low-VDD reset, watchdog timer, battery-backed event counters, lockable 64-bit serial number, and I2C interface up to 1 MHz.