The S25FL164K0XMFB013: The manufacturer has ceased production and there is no official last-time-buy window open.
64 Mbit SPI NOR — 108 MHz quad I/O
This is a 64 Mbit non-volatile NOR Flash memory organised as 8M x 8. The SPI interface supports Quad I/O operation at a clock frequency of 108 MHz — that gives a read throughput that keeps a Cortex-M or similar MCU fed without wait states on code execute-in-place. The write cycle time per page is 3 ms, which matters when you are budgeting firmware update time in production or field-reprogramming cycles.
Automotive-grade temperature and qualification
The supply range is 2.7V to 3.6V, which sits comfortably on a 3.3V rail with margin for transients.
8-SOIC package — surface-mount footprint
The mounting type is surface mount.