QDR II synchronous SRAM — 250 MHz, no dead cycles
The Cypress CY7C1311CV18-250BZC is a 18Mbit QDR II synchronous SRAM organized as 2M x 8. Its 250 MHz clock eliminates the bus-turnaround dead cycles typical of conventional SRAM, delivering back-to-back read and write bursts at full throughput — essential for high-bandwidth networking buffers, telecom line cards, and packet-processing engines where every clock cycle counts. The 1.7 V to 1.9 V core supply keeps I/O levels compatible with low-voltage logic families, and the 165-FBGA (13x15 mm) package fits dense PCB layouts.
250 MHz clock — what it means for the bus
At 250 MHz, the QDR II interface transfers data on both clock edges per port.
Temperature grade and environment
Rated for commercial temperature range (0°C to 70°C). That limits deployment to indoor, temperature-controlled environments — server rooms, telecom central offices, test equipment — not outdoor or industrial floor applications where ambient can swing beyond that window.