64 Mbit NOR Flash with Quad-SPI for automotive and industrial storage
The S25FL164K0XNFA010 is a 64 Mbit NOR Flash memory from Cypress's FL1-K series, organized as 8M x 8 bits. It uses a Quad I/O SPI interface running at up to 108 MHz, giving read throughput that keeps up with code-shadowing and data-logging tasks in automotive and industrial controllers. AEC-Q100 qualification means it was screened for the reliability margins an automotive ECU or ADAS module expects.
That means the manufacturer no longer accepts production orders; the only channel for this part is surplus inventory or broker stock. If you have an active design using this exact code, you need a last-time-buy plan or a validated replacement. The base product number S25FL164 suggests a family-level replacement path — check the S25FL164 series for a current-production variant that matches the 8-WSON footprint and Quad-SPI interface.
What the 108 MHz Quad-SPI means for the design
That is enough to support execute-in-place (XIP) for many MCUs without stalling the core on cache misses. The 3 ms page write time is typical for NOR — budget accordingly for firmware updates if the application writes more than a few pages per update cycle. The 8-WSON package (5x6 mm) with exposed pad helps thermal dissipation during sustained write operations, though the 64 Mbit density rarely pushes thermal limits in normal use.