What this part is and where it fits
The Infineon CY7C1570KV18-400BZXI is a 72Mbit synchronous SRAM with a DDR II+ interface, organized as 2M x 36. It clocks at 400 MHz.
Obsolete — sourcing reality
Infineon has marked this part obsolete. No last-time-buy window remains open through the factory channel. The only supply path is the independent surplus and broker market.
