4Mb 3.0V Automotive-E 108MHz QSPI EXCELON™ F-RAM in 8-pin SOIC The CY15B204QSN-108SXET is a 4 Mb EXCELON™ Auto Ferroelectric RAM (F-RAM) with a 512K × 8 organization and high-speed Quad SPI interface supporting up to 108 MHz SDR and 54 MHz DDR. It delivers 10^13 endurance cycles, 121-year data retention at 85°C, and instant non-volatile writes at bus speed. Operating from 1.8 V to 3.6 V across -40°C to +125°C, it integrates ECC, CRC, and advanced data protection.