256Mb SEMPER™ Nano 1.8V QSPI Flash in known good wafer format S25FS256TDAWEC109 is a 256 Mbit NOR flash in the FS-T family for code and data storage over Quad SPI. It operates from 1.7 V to 2.0 V across 0°C to 70°C, and supports 80 MHz SDR with up to 40 MByte/s bandwidth. Built-in ECC reports and corrects memory-array errors, with RD/BY# and reset support for robust system control. RoHS compliant, halogen free, longevity support through 2030.