Automotive NOR Flash for code-shadow and data-logging
The S25FL256LAGBHB020: SPI Quad I/O and QPI interface at 133 MHz, organized as 32M x 8 bits. AEC-Q100 traceability for production ECUs with firmware fitting 256 Mbit.
At 133 MHz the Quad-SPI interface delivers roughly 66 MB/s read throughput in quad mode, which is enough to support execute-in-place (XIP) for a Cortex-M7 or an R-car SoC without stalling the instruction fetch. The bus margin at that speed depends on PCB trace length and the number of loads — keep the clock trace unterminated under 50 mm and add a series resistor near the source if the layout is tight. The 24-BGA (8x6 mm) package keeps the signal paths short, but the BGA footprint forces at least a four-layer board with via-in-pad for the supply balls.
For a production ECU that ships under a PPAP, this certification saves you the cost of a separate qualification run. The active lifecycle status means Infineon is still manufacturing it — no last-time-buy notice on the horizon, so you can design it into a multi-year program without worrying about an EOL surprise mid-production.