633 MHz synchronous SRAM — what the clock rate buys you
The Infineon CY7C2565XV18-633BZC is a synchronous QDR II+ SRAM organized as 2M x 36, clocked at 633 MHz over a parallel interface. That clock rate translates to a burst bandwidth that keeps a high-speed packet processor or network search engine fed without wait states — the QDR II+ architecture delivers a read and a write on every clock edge, so the effective data rate is double the bus clock. The 1.7 V to 1.9 V supply range keeps I/O levels compatible with modern ASIC and FPGA banks at the same nominal voltage.
Where it fits — and where it doesn't
This part is built for equipment that needs deterministic, low-latency temporary storage at line rate: network routers, traffic managers, baseband processing cards, and test instrumentation. The 0°C to 70°C commercial temperature grade suits controlled indoor environments — rack-mounted telecom gear, lab instruments, and data-centre line cards. It is not rated for automotive or extended industrial ambient conditions.
EOL status — what it means for your BOM
Pin-compatible alternative for dual sourcing
The CY7C2568XV18-633BZXC is a functional near-match: same 72 Mbit density, same 633 MHz clock, same 165-FBGA footprint, but organized as 4M x 18 instead of 2M x 36. That means the bus width is halved — 18 data lines versus 36. If your design routes all 36 bits, the 4M x 18 part won't drop in without a board spin. For designs that can tolerate the narrower bus, it is a valid second source for supply resilience.