What the 80 MHz Quad I/O means for your boot and throughput
The Infineon S25FL256SDSMFV011 is a 256 Mbit serial NOR Flash from the FL-S family, organized as 32M x 8 bits. At an 80 MHz clock rate, the Quad I/O read throughput is enough to feed a high-speed MCU or FPGA configuration engine without stalling the bus — a practical concern when sizing the OTA staging area or boot image footprint. Packaged in a 16-SOIC wide-body (7.50 mm width), the footprint is a standard across the serial NOR industry, simplifying board layout and second-source qualification.
For new designs, this means no forced requalification cycle in the near term.
Second-source and cross-reference considerations
The key difference: the Infineon part extends the temperature ceiling to 105°C, which matters for applications that see sustained heat.