The FM25040B-GTR is a 4-Kbit (512 × 8) serial ferroelectric random access memory (F-RAM) with high-endurance nonvolatile storage, supporting 100 trillion read/write cycles and 151-year data retention at 65°C. Operating from 4.5 V to 5.5 V, it features a fast SPI interface up to 20 MHz, advanced write protection, and low power consumption. Its robust operation across -40°C to +85°C and RoHS-compliant 8-pin SOIC package suit industrial, data logging, and control applications.