DDR II SRAM for high-throughput memory subsystems
This part is designed for high-bandwidth applications like network packet buffers, telecom line cards, and high-end test equipment where the parallel interface and 250 MHz clock deliver the throughput needed to keep a fast data path fed without dead cycles.
A 250 MHz DDR II SRAM transfers data at an effective 500 MHz rate on a 36-bit-wide bus, yielding a peak bandwidth of 18 Gbit/s. That throughput is what makes this part a fit for designs that need to sustain back-to-back reads and writes without the turnaround penalty of older NoBL or QDR architectures. The 250 MHz variant sits above the 200 MHz speed grade (CY7C1321KV18-200BZXCT) — if your timing closure analysis shows margin at 200 MHz, the 250 MHz part buys extra headroom for future clock speed increases or relaxed PCB routing constraints.
The Tape & Reel (TR) packaging is the standard delivery for automated pick-and-place; if you are ordering for a prototype run or rework, be aware that a single reel typically holds several hundred units, so single-unit procurement may require a cut-tape or tray option from the distributor.