256 Mbit NOR Flash with Quad SPI — firmware storage and XIP
The S25FL256LAGNFI011 is a 256 Mbit NOR Flash from Infineon's FL-L series, organized as 32M x 8 bits and accessed through a SPI interface that supports Quad I/O and QPI protocols at up to 133 MHz. This density and read throughput suit it for firmware image storage, boot code shadowing to RAM, and execute-in-place (XIP) code execution in embedded systems where the CPU fetches instructions directly from Flash.
Package and thermal — WSON 6x8 mm with exposed pad
Housed in an 8-lead WDFN with exposed pad (WSON 6x8 mm), the package footprint is smaller than a standard SOIC-8 but requires the thermal pad to be soldered to a PCB copper plane — the datasheet's thermal resistance figures assume that pad connection, not a floating pad. The exposed pad also serves as the ground return for the die substrate; leaving it unsoldered raises the junction temperature above the rated operating limit under sustained read or erase cycles.
Lifecycle and sourcing — active production, no EOL notice
Sourced through authorized distribution; pricing and lead time confirmed at quote against the BOM quantity.