The Cypress CY7C12501KV18-450BZXC is a 36 Mbit synchronous SRAM built on the DDR II+ architecture, clocked at 450 MHz with a 1M x 36 organization. It is a volatile memory device using a parallel interface, designed for high-bandwidth data buffering in networking equipment, test instrumentation, and FPGA-based systems where the read-write bus turnaround of a standard QDR or NoBL SRAM matters. The DDR II+ interface eliminates dead cycles on back-to-back reads and writes, sustaining full-rate throughput at the 450 MHz clock.
450 MHz clock — timing closure and bus margin
The 450 MHz clock rate sets the timing budget for the memory interface. At this speed, signal-integrity on the parallel bus is the limiting factor — trace length matching, controlled impedance, and proper termination on the 36-bit data bus are not optional. The 165-ball FBGA (13x15 mm) package places the balls on a fine-pitch grid, which demands a multi-layer board with microvias or blind vias for fanout.