The Infineon S25FL256SAGMFIR03 is a 256 Mbit (32M x 8) NOR Flash memory from the FL-S series, built for code-shadowing, firmware storage, and data-logging in embedded systems that need fast, reliable non-volatile storage over a simple serial interface. It communicates over a SPI - Quad I/O bus at up to 133 MHz, which in quad-output mode delivers roughly 66 MB/s sustained read throughput — enough to keep a Cortex-M7 or a mid-range FPGA configuration controller fed without wait-state bottlenecks.
Package and footprint — 16-SOIC wide-body, Tape & Reel
Housed in a 16-SOIC (0.295", 7.50 mm width) surface-mount package, this part uses the industry-standard wide-body SOIC footprint common to 256 Mbit and 512 Mbit serial NORs.