256 Mbit SPI NOR Flash — 133 MHz Quad-I/O throughput
The Infineon S25FL256SAGMFBG00 is a 256 Mbit SPI NOR Flash from the FL-S series, organized as 32M x 8 bits. It clocks up to 133 MHz on the SPI bus with Quad I/O support — four data lines per clock edge, so sustained read throughput reaches roughly 66 MB/s in quad mode, enough to shadow code into RAM or stream display buffers without stalling the host controller.
Industrial temp grade and board-fit detail
The 105°C ceiling gives headroom above the 85°C commercial grade (S25FL256SAGMFIR00) for the same die and package. Surface-mount assembly on the 16-SOIC (300-mil body) — standard reflow profile per J-STD-020. The Tray packaging is typical for production volumes; the wide body keeps the part stable during pick-and-place. Supply decoupling: a 100 nF ceramic within 3 mm of each VCC pin is sufficient given the 2.7-3.6 V range and moderate switching current.
For BOM risk management, the S25FL256SAGMFV000 drops into the same 16-SOIC footprint with no rewiring — same 133 MHz quad-SPI interface, same 2.7-3.6 V supply, same 256 Mbit density. The only delta is the supplier device code suffix; the die and package are the same FL-S base.