256 Mbit NOR Flash for code shadow and OTA staging
The Infineon S25FL256SDSBHV213 is a 256 Mbit FL-S series NOR Flash memory organized as 32 M x 8 bits, accessed through a SPI Quad I/O interface clocked at 80 MHz. This part is the go-to for designs that need a reliable, high-density boot and code-storage NOR device with fast read throughput for execute-in-place (XIP) or shadow-to-RAM boot flows. The 80 MHz clock rate with Quad I/O yields a sustained read bandwidth that can keep a high-end MCU or FPGA configuration engine fed without wait states, assuming the host controller supports the Quad-SPI protocol. For firmware-over-the-air (OTA) applications, the 256 Mbit density provides ample staging space for a full-image backup plus active image, with room for configuration tables and calibration data.
Industrial temp range and BGA footprint
The 24-ball TBGA package (8 x 6 mm body) is a compact footprint for space-constrained designs, but demands careful PCB layout for signal integrity on the Quad-SPI lines and proper thermal management — the BGA's solder balls carry both electrical and thermal paths. Surface-mount assembly with the 24-BGA package requires standard reflow profiling for an MSL-rated device. The small ball pitch means the PCB pad design and solder paste volume need to match the package's coplanarity spec to avoid head-in-pillow defects. X-ray inspection post-reflow is recommended to verify ball wetting, especially on prototypes or first production runs.
For production planning, this removes the risk of forced redesigns or premium spot buys in the near term. The FL-S series is a mature, well-established NOR Flash family with broad ecosystem support, so firmware and hardware reference designs are stable.
