72 Mbit QDR II+ at 450 MHz — the throughput ceiling
The CY7C2565KV18-450BZC is a 72 Mbit synchronous SRAM organized as 2M x 36, clocked at 450 MHz on the QDR II+ interface. The 36-bit wide data bus delivers 3.6 GB/s peak bandwidth — the limiting factor in a packet buffer or lookup table is the controller's own port count, not the memory's data rate. The 1.7 V to 1.9 V supply rail means this part runs on a nominal 1.8 V plane. That narrow window demands a clean rail — a switching regulator with less than 3% ripple is fine; a noisy point-of-load converter without enough output capacitance will push the supply out of spec and cause read/write failures at speed.
For a BOM that already carries this footprint and supply voltage, the immediate concern is date code consistency across a production batch. When requesting a quote, specify the acceptable date code window and whether the parts need to come from a single lot to avoid timing skew across the bus.
165-ball FBGA — the board-level constraint
If the system sees an enclosure that hits 60°C internal ambient, the 70°C ceiling leaves only 10°C margin before the part is outside its rated operating range.