QDR and DDR devices feature 550MHz clock speed
Cypress Semiconductor
QDRII+
Cypress Semiconductor has announced it is sampling the industry's first quad data rate (QDR) and double data rate (DDR) SRAM devices on 65nm linewidth.
The new 72-Mbit QDRII, QDRII+, DDRII and DDRII+ memories leverage process technology developed with foundry partner UMC.
The new SRAMs feature what Cypress claims is the market's fastest available clock speed of 550MHz and a total data rate of 80 Gbps in a 36-bit I/O width QDRII+ device, using half the power of 90-nm SRAMs.
They are ideal for networking applications, including internet core and edge routers, fixed and modular Ethernet switches, 3G base stations and secure routers.
They also enhance the performance of medical imaging and military signal-processing systems.
The devices are pin compatible with 90nm SRAMs, enabling networking customers to increase performance and port density while maintaining the same board layout.
Compared with their 90nm predecessors, the 65nm QDR and DDR SRAMs lower input and output capacitance by 60 per cent.
The QDRII+ and DDRII+ devices have on-die termination (ODT), which improves signal integrity, reduces system cost and saves board space by eliminating external termination resistors.
The 65nm devices use a phase locked loop (PLL) instead of a delay locked loop (DLL), which enables a 35 per cent wider data valid window to reduce development time and cost for the customer.
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