The S25FL256SAGBHIY00 is a 256 Mbit (32M x 8) NOR flash from Infineon's FL-S series, organised as 32M x 8 and accessed over a SPI Quad I/O interface running at 133 MHz. The Quad I/O protocol reads four bits per clock cycle, so the effective read throughput at 133 MHz is about 66 MB/s — enough to feed a Cortex-M or low-end application processor without a separate parallel bus.
Package, temperature grade, and rework notes
Housed in a 24-ball TBGA (8x6 mm body), the part is a fine-pitch BGA — the 0.80 mm ball pitch is manageable with a standard reflow profile, but the 8x6 mm footprint means the centre balls are not visible for optical alignment.
Active lifecycle — no end-of-life risk for new designs
Infineon lists this part as Active. The base product number S25FL256 spans multiple speed and temperature grades — if the 133 MHz industrial version is the fit, this order code locks that specific combination.