The CY15B104Q-SXIT is a 4-Mbit (512 K × 8) serial F-RAM memory with SPI interface supporting up to 40 MHz operation. It delivers 100 trillion (10¹⁴) read/write cycles, 151-year data retention at 65°C, and instant NoDelay™ writes. Operating from 2.0 V to 3.6 V over –40°C to +85°C, it features low active (0.3 mA at 1 MHz), standby (100 μA), and sleep (3 μA) currents.