The S25FL164K0XNFIQ13: The 8-WSON (5x6 mm) exposed pad package keeps the footprint compact while the pad helps pull heat from the die during extended writes or high-duty read cycles. This class of NOR Flash is common in embedded systems that need fast, random-access code storage — boot firmware, configuration tables, or over-the-air update staging — where the Quad SPI interface gives four times the throughput of a standard SPI bus without adding pins.
108 MHz Quad SPI — read throughput and bus timing
The 3 ms page write time (typical) means a 256-byte page programs in a few milliseconds — fine for OTA staging or parameter storage, though not a candidate for high-frequency data logging.
Obsolete — sourcing reality and what to do
That means Cypress has stopped production; there is no last-time-buy window remaining. The only channel is surplus or broker inventory — independent distributors who hold legacy stock. If you have an active BOM line using this order code, the practical move is to qualify a pin-compatible replacement before your stock runs dry.
Package and board-level handling
The pad is electrically connected to the substrate (usually ground), so the PCB footprint should tie it to the ground plane with a few vias.