The Infineon CY7C2668KV18-550BZC is a QDR-II+ SRAM organized 4M×36, clocked at 550 MHz with a 0.45 ns access time, in a PBGA-165 package. This is a high-bandwidth memory part built for networking line cards, telecom backplanes, and high-end test equipment where the bus turnaround penalty of conventional SRAM kills throughput. The QDR architecture eliminates dead cycles on read-write transitions — every clock edge transfers data, so the controller sees sustained 550 MHz bidirectional bandwidth without arbitration gaps.
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