Obsolete — sourcing the S25FL164K0XMFB011 now
The S25FL164K0XMFB011 is listed as obsolete. That means Infineon has stopped production, and the only available stock is what exists in distribution or on the independent market. If you have an active BOM line using this part, the window for last-time-buy has already closed, so every reel found is effectively end-of-life inventory.
This is an Infineon (formerly Cypress) FL1-K series 64 Mbit NOR flash memory organized as 8M x 8 bits. It uses the SPI Quad I/O interface, which means it can transfer data on four data lines simultaneously, giving a practical read throughput well above standard SPI. The 108 MHz clock rate supports execute-in-place (XIP) boot for an MCU or SoC without needing to shadow code into RAM first. Write cycles are 3 ms per page, typical for this density class.
Automotive-grade temperature and qualification
Housed in an 8-pin SOIC package with 5.30 mm body width (the 0.209″ wide version), surface-mount soldered. The 8-SOIC footprint is common and easy to route, with the SPI signals on a single side of the package for clean board layout.