The CY15B104QN-50SXAT is a 4Mb EXCELON™ Auto Ferroelectric RAM (F-RAM) for automotive systems, offering non-volatile memory with 100 trillion read/write cycles and 151-year data retention. It operates from 1.8 V to 3.6 V across -40°C to +85°C, supports SPI up to 50 MHz, and features advanced write protection. Low-power modes include standby and deep power-down. AEC-Q100 Grade 3 compliant and available in an 8-pin SOIC package, it is suited for high-reliability automotive use.