Cypress Semiconductor has announced production availability of the first Quad Data Rate IV (QDR-IV) SRAM. Cypress is offering QDR-IV SRAMs in 144- and 72-Megabit (Mbit) densities with the Random Transaction Rate (RTR) required for 100-400 Gigabit line cards in next-generation switches and routers.
RTR, the number of fully random memory accesses per second, is the critical memory performance metric for increased line card and switching rates. The bottleneck for reaching increased line card rates is the processing of look-up tables, statistics and state counters stored in memory, as well as scheduling functions. QDR-IV devices deliver the RTR required to support these functions, enabling higher bandwidth and higher quality video streams.
“Global network traffic continues to increase at a rapid rate, pushing network architectures to their limits,” said Dana Nazarian, Executive Vice President of the Memory Products Division at Cypress. “These new QDR-IV solutions pave the way for the next generation of high-performance switches and routers to meet the growing demand.”
Cypress’s QDR-IV SRAM is capable of operating in burst-of-two or banked burst-of-two modes, which deliver the fastest clock speeds and highest RTR of all QDR SRAMs. The banked burst-of-two operating mode operates at a maximum frequency of 1,066 MHz with an RTR of 2,132 million transactions per second (MT/s), while the standard burst-of-two operating mode can achieve a maximum frequency of 667 MHz and an RTR of 1,334 MT/s. Both of these operating modes represent a significant improvement over the previous generation of QDR SRAM (450 MHz frequency, 900 MT/s RTR).
“QDR-IV memories provide the high bandwidth necessary for emerging telecommunications and data centre networking applications that require 400 Gbps,” said Argy Krikelis, strategic marketing architect, Altera Corporation. “Working closely with Cypress has enabled Altera to support customers in architecting systems that will use Cypress QDR-IV memories together with Altera’s Arria 10 FPGAs and SoCs to meet next-generation system requirements.”