36 Mbit QDR II+ SRAM at 450 MHz — what it means for the bus
The Infineon CY7C1262XV18-450BZXC is a 36 Mbit synchronous SRAM built on the QDR II+ architecture, organized as 2M × 18. The 450 MHz clock rate gives the bus a read-write turnaround with no dead cycles — the QDR II+ interface eliminates the idle cycle between read and write that conventional SRAMs require. That matters for high-throughput packet buffers in network switches, line cards, and telecom line-rate processing where every clock edge carries a data transfer.
Supply and temperature — fit for controlled environments
The part operates from a 1.7 V to 1.9 V core supply, which aligns with the lower-voltage I/O of modern ASICs and FPGAs. The 0 °C to 70 °C commercial temperature range restricts it to indoor, climate-controlled equipment — server rooms, central offices, and lab-grade instrumentation. For an outdoor or industrial bay, you would need the extended-temperature variant of this family.
Package and footprint — 165-FBGA (13x15 mm)
The 165-ball FBGA package (13x15 mm body) is a fine-pitch BGA that requires a multi-layer PCB with microvias or blind vias for fanout. The footprint matches the standard QDR II+ SRAM layout used across the CY7C1262 family, so a board laid out for a slower speed grade can accept this 450 MHz part with no PCB change — just a BOM swap.