What this 72Mbit DDR II+ SRAM does on the board
The CY7C1570KV18-400BZC is a 72 Mbit synchronous SRAM using a DDR II+ pipeline — it clocks data on both edges of a 400 MHz input clock, giving the system a 800 MT/s data rate over a 36-bit-wide word bus (2M x 36 organization). That bandwidth suits high-throughput buffer applications — network line cards, switch fabrics, or test equipment — where the deterministic access time of SRAM beats the latency variance of DRAM.
Package and supply rails — what the layout needs
No extended or industrial range on this variant — if the board sees an enclosure that hits 85°C, this part is out of spec.
Obsolete — the sourcing reality
For a repair or a short-run production board, the only channel is the independent surplus market — we source and quote each lot against an RFQ, with availability confirmed at quote time.