The S25FL128LDPMFV000 is a 128 Mbit (16M x 8) NOR Flash from Infineon's FL-L series, built for code shadowing, parameter storage, and firmware-over-air staging in embedded systems that need fast random access and reliable non-volatile storage. Its SPI interface supports Quad I/O and QPI (Quad Peripheral Interface), which means the data bus operates in four-bit-wide mode for read operations — effectively quadrupling throughput over a standard SPI read at the same clock rate. At 66 MHz, Quad I/O delivers a sustained read bandwidth of roughly 33 MB/s, enough to feed a Cortex-M7 executing from external Flash with minimal wait states.
Package and footprint — 16-SOIC wide-body
Housed in a 16-SOIC (0.295", 7.50 mm width) package, the S25FL128LDPMFV000 uses a standard 300-mil-wide SOIC footprint that is widely second-sourced across NOR Flash vendors. The wide-body SOIC-16 is a reflow-friendly, inspectable package — no hidden solder joints, easy for rework and visual inspection.