16 Mbit NOR Flash — SPI Quad I/O at 108 MHz
The Infineon S25FL116K0XMFIS11 is a 16 Mbit NOR Flash memory from the FL1-K series, organized as 2M x 8 bits. It communicates over an SPI Quad I/O interface with a clock frequency of 108 MHz, which means the read throughput ceiling is set by the quad-lane bus rather than the core array access time — a firmware image loads in under a second at that rate.
The wide-body variant has a larger exposed pad area than the narrow SOIC-8, which improves thermal coupling to the PCB copper pour — relevant if the part sees sustained read bursts that raise the die temperature above ambient. The page write cycle time is 3 ms typical. Budget this into the firmware update sequence: a full 16 Mbit chip erase followed by a page-by-page write takes roughly 1.5 seconds on the quad-lane bus, but the erase time dominates the window.
Infineon lists the S25FL116K0XMFIS11 as obsolete.