133 MHz clock and Quad I/O — throughput for code shadowing
At 133 MHz with Quad I/O, the part delivers sustained read throughput in quad mode. That is fast enough to boot a Cortex-A or RISC-V application processor directly from Flash. The 512 Mbit density holds a 64 MB firmware image.
For dual-sourcing resilience, the S25FL512SAGMFIR10 (same 512 Mbit, same 133 MHz, same -40°C to 85°C range) comes in a SOIC-16 package — a drop-in alternative if your board layout can accommodate the larger footprint. The S25FL512SAGBHV210 is the 105°C extended-temp variant in the same BGA package, useful if the design later moves to a hotter environment.