133 MHz Quad I/O Throughput and Interface Options
The 133 MHz clock frequency applies across all interface modes — standard SPI, dual I/O, quad I/O, and QPI — so the effective read throughput scales with the bus width. In quad I/O mode, the device delivers up to 532 Mbps (133 MHz × 4 bits), which is the practical ceiling for fast code execution or firmware shadowing to RAM. The QPI (Quad Peripheral Interface) mode reduces the command overhead by using all four I/O pins for both address and data, improving random-read efficiency compared to standard SPI where the command and address cycles occupy the bus serially. Budget the P/E cycles and retention at temperature: as a NOR flash, the S25FS256SAGMFI000 supports reliable code storage with fast random access, but the endurance and retention characteristics are defined by the process node — for high-write applications like data logging, consider the write endurance per sector and whether wear-leveling is needed at the application layer.
Industrial Temperature Grade and 16-SOIC Package
The 1.7V to 2V supply rail means the part requires a dedicated 1.8V rail or a regulator from a higher bus voltage. ROHS3 compliant — no exemptions for lead in solder or other restricted substances, which simplifies compliance for EU and global markets.