128 Mbit SPI NOR Flash for code storage and data logging
It uses the SPI - Quad I/O interface, which allows read speeds up to 108 MHz in Quad mode — enough to support execute-in-place (XIP) boot for many MCUs and SoCs without a separate DRAM.
108 MHz Quad-SPI — what it buys the system
The 108 MHz clock rate with Quad I/O translates to a theoretical throughput of 54 MB/s (108 MHz × 4 bits). In practice, the controller's overhead and command overhead reduce that, but it still shadows code or streams data faster than a single-bit SPI at the same clock. If your MCU's Quad-SPI controller supports DDR or DTR modes, check that the part's timing parameters align — the datasheet's AC characteristics table is the final word on setup/hold margins.
If your design sees sustained junction temperatures above 85°C — under-hood automotive, engine bay, or hot-side industrial — the S25FL127SABMFV101 or S25FL127SABMFV100 extend the range to 105°C. The package and pinout are identical, so it's a drop-in swap on the layout.
Housed in an 8-SOIC package (0.209", 5.30 mm width), surface-mount. The footprint matches industry-standard SOIC-8 land patterns. The Tube shipping medium is fine for prototype or low-volume builds; for production, the Tray or Tape & Reel variants (S25FL127SABMFV100, etc.) are more common on pick-and-place lines.