128 Mbit SPI Quad I/O NOR Flash in a 24-BGA
The 133 MHz SPI clock with Quad I/O means the part can sustain a read throughput that keeps a modern MCU or FPGA fed during boot without stalling. If you are sizing the flash for execute-in-place (XIP) or a fast firmware load, this clock rate is the number that determines whether the memory becomes the bottleneck. The Quad I/O interface also reduces the pin count compared to a parallel NOR, which simplifies the PCB routing on a 24-BGA footprint.
24-BGA package — rework and layout notes
The balls are under the package, so you need a hot-air station with a nozzle that matches the 8x6 mm outline and a preheat plate to avoid warping the board. MSL is not listed in the spec, but a standard BGA profile with a peak reflow around 245°C should work — verify the moisture sensitivity label on the reel before baking.
If you are qualifying a second source, Infineon's FL-S series includes density and package variants that are pin-compatible across the family, but no official cross-reference is listed here.