The CY15V104QN-50BFXI is a 4-Mb EXCELON™ LP ferroelectric RAM (F-RAM) with 512K × 8 organization, accessed via an SPI interface supporting up to 50 MHz. It delivers 10^15 read/write cycle endurance, 151-year data retention at 60°C, and instant non-volatile writes with zero delay. Operating from 1.71 V to 1.89 V over –40°C to +85°C, it features low active current and advanced write protection.