The S25FL116K0XBHI033 is officially marked as obsolete by Infineon. No official successor is listed on the lifecycle record, so a pin-compatible drop-in replacement is not confirmed by the manufacturer — any substitution will require a qualification cycle.
108 MHz Quad-SPI — read performance for code shadowing
This part runs the SPI bus at 108 MHz in Quad I/O mode, which gives a practical read throughput that can keep a Cortex-M or similar MCU fed during code shadowing from Flash to RAM. The 2 M x 8 organization (16 Mbit total) is a common size for bootloaders, configuration parameters, and firmware images in industrial controllers and networking gear. The 3 ms page write time is typical for this NOR generation — fine for field updates, not for high-frequency data logging.