16 Mbit NOR Flash with Quad-SPI — what you get
The Infineon S25FL116K0XMFN041 is a 16 Mbit SPI NOR Flash memory from the FL1-K series, organised as 2M x 8 bits. It communicates over a standard SPI bus with Quad I/O support, clocking up to 108 MHz for fast read and program operations.
This part carries an official Obsolete lifecycle status. The 16 Mbit Quad-SPI NOR Flash space has several active alternatives from Infineon and other vendors, but pin-compatibility varies by package and interface variant — a direct drop-in replacement is not something to assume without comparing the footprint and the register map.
Quad I/O — check your host controller
The S25FL116K0XMFN041 uses a standard SPI bus with Quad I/O (four data lines) for read and program operations at 108 MHz. If your MCU or SoC only supports single or dual SPI, the part still works — it falls back to the standard SPI protocol — but you lose the throughput advantage. The 8-SOIC package (0.154-inch width, 3.90 mm body) is a common footprint shared with many serial NOR Flash parts in the 8-pin SOIC format, so a board layout designed for a different 8-SOIC SPI Flash will likely accept this part without a respin.