The 80 MHz clock frequency is the interface's top speed, but the real-world throughput depends on the SPI mode. In Quad I/O (four data lines active), each clock cycle transfers four bits, so the raw read rate hits 40 MB/s. That is fast enough to shadow a 256 Mbit image into RAM in under a second, or to stream audio samples and boot logos without stalling the host. The FL-S series supports continuous read mode, so the controller can keep the chip select low across multiple read commands and avoid the command-address overhead per access — worth enabling in the driver for any sequential read workload.
BGA footprint and board-level fit
The supplier device package is 24-BGA (8x6), and the tape-and-reel delivery is standard for automated pick-and-place. If your rework station lacks a BGA preheater, factor in a hot-air nozzle matched to the 8x6 mm body size.
There is no imminent last-time-buy window, and the base product number S25FL256 is an active family with multiple speed and package variants. For dual-sourcing resilience, the FL-S series has pin-compatible density options — the same footprint handles 128 Mbit and 512 Mbit siblings — though the exact order code S25FL256SDSBHI213 is the 256 Mbit, 80 MHz, industrial-temperature variant in the 24-BGA.