NOR Flash for high-throughput serial boot and data storage
The 8 ns access time keeps random-read latency low enough for cached microcontroller designs.
At 133 MHz with Quad I/O, the S25FL128SAGBHVD03 delivers a sustained read throughput that keeps a Cortex-M or RISC-V core fed during firmware shadowing. If you are using it for code shadowing at boot, the 8 ns access time means the first random read completes in a single SPI clock cycle, so the CPU is not stalled waiting for the initial instruction. The Quad I/O interface doubles the data rate over standard SPI without adding extra pins — useful on dense BGA boards where every signal matters.
The part comes in a 24-ball BGA (8 mm x 6 mm body).
Cypress lists the S25FL128SAGBHVD03 as Active. That means no last-time-buy risk for new designs and stable supply through franchised distribution. No successor has been announced — the FL-S series is the current mainstream serial NOR family from Infineon (formerly Cypress).