512 Mbit HyperFlash™ KS — what the specs mean for your design
The Cypress S26KS512SDPBHN020 is a 512 Mbit parallel NOR Flash from the HyperFlash™ KS family, organized as 64M x 8. It delivers a 96 ns initial access time and supports a 166 MHz burst clock, making it a strong candidate for execute-in-place (XIP) code storage in high-reliability embedded systems. The 1.7 V supply rail lets it run from a single-cell battery or a modern low-voltage core supply without a separate regulator. The 24-ball FBGA package keeps the footprint compact for space-constrained PCBs, but the BGA requires careful rework planning — a hot-air profile that reaches the center balls without overheating the surrounding passives is essential.
Parallel interface — bus timing and layout
The parallel interface (address/data multiplexed) ties directly to a host memory controller with a dedicated chip select and read/write strobes. The 96 ns access time sets the minimum read cycle for random access; at 166 MHz burst mode, the controller can stream sequential instructions at full clock rate. On the PCB, keep the parallel bus traces length-matched and avoid vias on the data lines to maintain signal integrity at this speed.