What this DDR II SRAM does — 267 MHz, 36 Mbit, 2M × 18
The CY7C1418AV18-267BZXC: 36 Mbit synchronous DDR II SRAM clocked at 267 MHz, organized as 2M words by 18 bits. The 1.7 V to 1.9 V supply and 165-LBGA package support parallel interface operation.
The CY7C1418AV18-267BZXC is marked obsolete by Cypress (Infineon). No last-time-buy window remains open; the part is no longer manufactured. There is no official pin-compatible successor from Cypress for this density and speed grade; any replacement would require a PCB respin or a different memory architecture (QDR, RLDRAM) with a new timing closure effort.
