72 Mbit QDR II+ SRAM at 450 MHz — buffer or look-aside cache fit
The CY7C2563KV18-450BZXI is a 72 Mbit synchronous SRAM organized 4M x 18, clocked at 450 MHz, using the QDR II+ architecture. This density and speed target high-throughput applications like network packet buffers, test-equipment waveform memories, and FPGA look-aside caches where the read and write ports run independently on every clock edge.
Obsolete — sourcing through independent surplus channels
Infineon lists this part as Obsolete. The 165-ball FBGA (13x15 mm) ball-out is fixed; a board spin would be required to migrate to a different package or memory architecture.
1.8 V core rail and industrial temperature grade
The supply range is 1.7 V to 1.9 V — a single 1.8 V rail with ±0.1 V tolerance covers it, but the PCB must hold that rail tight under load transients.