High-Density 64kBit SPI FRAM Module | 16MHz, -40 to 125°C, Pure Sn Finish The CY15B064Q-SXE is a 64-Kbit (8K × 8) automotive-grade serial F-RAM with high-endurance nonvolatile memory and a fast SPI interface up to 16 MHz. It supports 10 trillion (10¹³) read/write cycles, 121-year data retention at 85°C, and operates from 3.0 V to 3.6 V over a -40°C to +125°C range.