The CY15B104QI-20LPXIT is a 4-Mbit EXCELON™ LP ferroelectric RAM (F-RAM) with high-speed SPI, organized as 512K × 8. Operating from 1.8 V to 3.6 V and –40°C to +85°C, it delivers virtually unlimited endurance of 10^15 read/write cycles and 151-year data retention. Features include inrush current control, fast no-delay writes, advanced write protection, unique device ID, and a 256-byte special sector, making it ideal for industrial and data logging applications.