The S25FL256LDPBHI033 is officially classified as Obsolete by Infineon Technologies.
256Mbit SPI NOR flash with 66 MHz quad-I/O
This is a 256 Mbit (32M x 8) NOR flash memory organized as a single non-volatile array. The SPI interface supports Quad I/O and QPI modes, allowing the 66 MHz clock to deliver effective read throughput well above a standard single-bit SPI bus — the four data lines each carry one bit per cycle, so the raw transfer rate at 66 MHz reaches 264 Mbit/s in quad-read mode.
24-BGA (6x8 mm) — footprint and layout considerations
The 24-ball BGA package measures 6 mm x 8 mm (supplier device package 24-BGA). This is a fine-pitch array — the ball pitch is approximately 0.8 mm — which requires a multi-layer PCB for fan-out.