The CY15B256Q-SXET is a 256-Kbit (32K × 8) automotive-grade serial F-RAM memory, delivering nonvolatile storage with 10^13 read/write cycles and 121-year data retention at 85°C. It operates from 2.7 V to 3.6 V, supports SPI up to 33 MHz, and meets AEC-Q100 Grade 1 (–40°C to +125°C). Features include NoDelay™ writes, low 5 mA active current, 500 μA standby, 12 μA sleep mode, and robust hardware/software write protection.