256 Mbit SPI NOR Flash — 80 MHz Quad I/O for fast code shadowing
The Cypress S25FL256SDSMFB003 is a 256 Mbit SPI NOR Flash from the FL-S series, organized as 32M x 8 bits. It communicates over a Quad I/O SPI interface at up to 80 MHz, delivering the read throughput needed for fast boot, XIP (eXecute-In-Place), and firmware shadowing in embedded systems. The 2.7 V to 3.6 V supply range and industrial temperature grade (-40 °C to 105 °C) suit it for outdoor telecom base stations, factory automation controllers, and automotive infotainment head units that must retain code and calibration data across power cycles.