The FM25V20A-DGQTR is a 2-Mbit (256 K × 8) serial ferroelectric RAM (F-RAM) with SPI interface, offering high-endurance nonvolatile storage. Operating from 2.0 V to 3.6 V and supporting up to 33 MHz clock, it endures 10^14 read/write cycles and retains data for 121 years at 85°C.