The Cypress S25FL116K0XMFV041 is a 16 Mbit serial NOR Flash memory from the FL1-K family, organized as 2M x 8 bits. It communicates over a Quad I/O SPI interface clocking at up to 108 MHz, which gives read throughput sufficient for code shadowing or execute-in-place in an MCU-based system.
Any stock you find is either leftover franchised inventory or surplus from the independent channel. If you have this on a BOM for an active product, you need to qualify a replacement or secure the remaining available units before the channel dries up entirely. The official base product number is S25FL116, which may help trace pin-compatible siblings in the same family.
108 MHz Quad-SPI — the throughput decision
The Quad I/O interface clocks at 108 MHz. Page program time is 3 ms typical.
Industrial temperature range — deployment context
The 8-SOIC package has reasonable thermal impedance for the 16 Mbit die, but if your system sees sustained 105°C, verify the derating on the supply current and program/erase times from the datasheet curves. The 3 ms page write cycle is specified at 25°C; expect it to stretch at temperature extremes.