64 Mbit SPI Quad-I/O — the interface that matters
The S25FL164K0XMFIS13 is a 64 Mbit NOR Flash organized as 8M x 8, accessed through an SPI Quad-I/O interface running at up to 108 MHz. Quad-I/O means four data lines transfer in parallel during read and program operations, giving a practical throughput edge over standard SPI without adding many board traces. The 108 MHz clock rate lets the memory keep up with moderate-speed MCU code-fetch and data-logging tasks — useful for firmware-over-the-air staging or configuration storage where the host has a Quad-SPI peripheral. Write-cycle time per page is 3 ms, typical for this density class; the 64 Mbit array is large enough for a bootloader plus two application images in a field-update scheme.
Package and temperature — board-fit check
Housed in an 8-SOIC with 5.30 mm body width (0.209 inch), the S25FL164K0XMFIS13 uses a standard surface-mount footprint shared by many SPI NOR Flash parts in the 8-pin SOIC narrow-wide family.