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Cypress Introduces QDR-IV SRAMs with Industry-Leading Random Transaction Rate for Next-Generation Networking Equipment | Cypress Semiconductor

Cypress Introduces QDR-IV SRAMs with Industry-Leading Random Transaction Rate for Next-Generation Networking Equipment

Last Updated: February 15, 2018

New 144-Mbit and 72-Mbit SRAMs Deliver Up to 2,132 Million Transactions per Second,
Enabling 100-400 Gigabit Line Cards for Routers and Switches

SAN JOSE, Calif., April 1, 2014 – Cypress Semiconductor Corp. (Nasdaq: CY), the Static Random Access Memory (SRAM) market leader, today announced production availability of the industry’s first Quad Data Rate IV (QDR®-IV) SRAM. Cypress offers 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. Cypress’s QDR-IV SRAM is the market’s highest performance, standardized networking memory solution.

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. “Cypress’s new QDR-IV solutions pave the way for the next generation of high-performance switches and routers to meet the growing demand. As the market leader in SRAM, we continue to raise the bar on performance while simultaneously providing a standards-based product to our customers.”

Industry Support for Cypress QDR-IV SRAM
“QDR-IV memories provide the high bandwidth necessary for emerging telecommunications and data center 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.”

“Xilinx® UltraScale™ FPGA devices, which are currently shipping, were architected to support high-performance memory devices such as Cypress’s QDR-IV SRAM and deliver the flexibility required in high-bandwidth applications,” said Dave Myron, senior director of FPGA product management and marketing. “Xilinx and Cypress have established a long-standing, strategic relationship to expedite time-to-differentiation in fulfilling the next-generation needs of our mutual customers.”

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 was developed in the QDR consortium, whose members jointly define SRAM standards to enable multiple sources and supply stability. More information on Cypress QDR SRAM is available at

The 144-Mbit CY7C41xxKV and 72-Mbit CY7C40xxKV QDR-IV SRAMs are shipping in production quantities today and are available in a 361-ball Flip Chip Ball Grid Array (FCBGA) package.



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About Cypress
Cypress delivers high-performance, mixed-signal, programmable solutions that provide customers with rapid time-to-market and exceptional system value. Cypress offerings include the flagship PSoC® 1, PSoC 3, PSoC 4 and PSoC 5LP programmable system-on-chip families. Cypress is the world leader in capacitive user interface solutions including CapSense® touch sensing, TrueTouch® touchscreens, and trackpad solutions for notebook PCs and peripherals. Cypress is a world leader in USB controllers, which enhance connectivity and performance in a wide range of consumer and industrial products. Cypress is also the world leader in SRAM and nonvolatile RAM memories. Cypress serves numerous major markets, including consumer, mobile handsets, computation, data communications, automotive, industrial and military. Cypress trades on the NASDAQ Global Select Market under the ticker symbol CY. Visit Cypress online at

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Cypress, the Cypress logo, PSoC, CapSense, and TrueTouch are registered trademarks of Cypress Semiconductor Corp. QDR and Quad Data Rate SRAMs comprise a family of products developed by Cypress, IDT, NEC Electronics, Renesas and Samsung. All other trademarks are property of their owners.

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