256 Mbit SPI-NOR Flash — industrial temperature, EOL sourcing
The S25FL256LDPMFN000 is a 256 Mbit SPI-NOR Flash from the FL-L series, organized as 32M x 8, with a 66 MHz clock and Quad I/O and QPI interface support. It operates from 2.7 V to 3.6 V and is rated for -40°C to 125°C, making it suitable for industrial and outdoor telecom equipment where wide temperature margin is required. This is a surface-mount part in a 16-SOIC package (7.50 mm width). Quad I/O and QPI allow the memory to transfer four bits per clock cycle, improving read throughput beyond standard SPI — useful for execute-in-place firmware or fast boot sequences in industrial controllers and communications gear.