The QDR Consortium, which includes Cypress Semiconductor Corp. and Renesas Electronics, today announced the industry's fastest Quad Data Rate (QDR) SRAM devices (static random access memory).
The new memory devices will be named QDRII+ Xtreme and will operate at
clock speeds as fast as 633 megahertz (MHz). They will be fit-, form-
and function-compatible with existing QDR II+ devices, allowing
manufacturers of network switches, routers and aggregation platforms to
boost performance by simply increasing clock speeds within the system
without any board design changes.
The new QDR II+ Xtreme SRAMs will be offered with either x18 or x36 word
widths, and with bursts of 4 or 2 access. The burst of 4 devices
delivers a random transaction rate (RTR) of 633 million random
transactions per second, operating at clock speeds of 633 MHz, the
highest available for a QDR SRAM. The burst of 2 offerings operate at a
frequency of 450 MHz and offer an RTR of 900 million random transactions
per second, which doubles the RTR of the prior generation burst of 4
devices running at the same frequency. The random transaction rate is
defined as the number of fully random memory accesses per second and is
the critical memory metric enabling increased line/switching rates.
First engineering samples of the 36 megabit (Mb) and 72Mb QDR II+ Xtreme
devices from Cypress are expected in mid-2011.