18 Mbit QDR II SRAM at 250 MHz — bus bandwidth and timing
The Cypress CY7C1312CV18-250BZC is a 18 Mbit synchronous QDR II SRAM organized as 1M x 18, clocked at 250 MHz. QDR II architecture delivers two data words per clock cycle on separate read and write ports, effectively doubling the data throughput compared to a single-port SRAM at the same clock rate. The parallel memory interface requires careful PCB routing to maintain signal integrity at 250 MHz — the 165-FBGA (13x15 mm) package with fine ball pitch demands controlled-impedance traces and adequate decoupling on the supply rails.
Commercial temperature range — indoor equipment only
Cypress (now part of Infineon) no longer manufactures this specific order code in volume. New designs should not target this part; existing BOM lines must be filled through the surplus and broker channel.