DDR II synchronous SRAM — 278 MHz, 18 Mbit, 165-FBGA
The Infineon CY7C1318CV18-278BZXC is a DDR II synchronous SRAM delivering 18 Mbit density organized as 1M x 18. The 278 MHz clock rate supports high-bandwidth burst transfers for network packet buffers, telecom line cards, and test equipment where deterministic read-write turnaround matters. Parallel interface keeps pin count manageable on the 165-FBGA (13x15 mm) footprint. Supply range 1.7V–1.9V aligns with low-voltage core logic; commercial temperature grade 0°C to 70°C limits it to indoor, temperature-controlled environments.
This part is marked obsolete by Infineon. No last-time-buy window remains open. Procurement must source through independent surplus or broker channels. For a long-term BOM, evaluate a pin-compatible alternative in the same DDR II family; the CY7C1318 series shares footprint and interface across density options, but verify the specific speed grade and temperature range against your design.