The CY15V104QSN-108SXI is a 4-Mbit EXCELON™ Ultra Ferroelectric RAM (F-RAM) with quad SPI interface supporting up to 108 MHz SDR and 54 MHz DDR. It offers virtually unlimited endurance of 100 trillion cycles and 151-year data retention at 65°C. Operating from 1.71 V to 1.89 V across -40°C to +85°C, it features instant non-volatile writes, embedded ECC and CRC for data integrity, and advanced protection. The 8-pin SOIC package is RoHS compliant for industrial use.