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What is DDR2?
Acronym for Double-Data-Rate Two, which refers to a computer memory technology as it applies to synchronous dynamic random access memory (SDRAM). Standards are defined for the ICs as well as the DIMMs they enable. A single-data-rate SDRAM transfers data on every rising edge of the clock pulse 100MHz. Both DDR and DDR2 are double pumpedthey transfer data on the rising and falling edges of the clock, achieving an effective rate of 200MHz with the same clock frequency. The difference between DDR2 to DDR is a doubled bus frequency for the same physical clock rate, which doubles the data rate yet another time.
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2006-03-16 Xilinx releases Virtex-4 FPGA based DDR2 reference design
Xilinx announced the immediate availability of the Virtex-4 FPGA based 667Mbps DDR2 reference design delivering high bandwidth and reliable memory interface solution.
2007-08-09 Xilinx provides free reference design for DDR2-400
Xilinx unrolls a free reference design that enables designers to quickly implement 400Mbps DDR2 SDRAM interfaces with Spartan-3 FPGAs.
2006-02-06 Xilinx announces new DDR2 reference design
Xilinx's DDR2-SDRAM interface uses the Virtex-4 ChipSync technology, a run-time calibration circuit that improves design margins and overall system reliability while reducing design cycles.
2009-02-09 Using high-performance DDR, DDR2, and DDR3 SDRAM with SOPC Builder
The Altera DDR, DDR2, and DDR3 SDRAM high-performance controller MegaCore functions version 7.1 and later support SOPC Builder.
2004-10-26 Toshiba to use Rambus DDR2 interface
Toshiba Corp. has selected Rambus Inc. DDR interface cells for next-generation high-volume consumer applications.
2008-03-19 Test solution rolls for DDR2, DDR3 SDRAM
Tektronix has released a comprehensive test tool set for DDR2 and new DDR3 SDRAM technology, developed to deliver higher performance data rates.
2004-07-23 Semtech controller meets DDR2 memory requirements
Semtech's SC1486A is a dual synchronous controller for systems designers specifying DDR2 memory.
2007-08-06 Samsung's 50nm 1Gbit DDR2 memory validated by Intel
Samsung Electronics Co. Ltd claims that its 50nm-class DDR2 DRAM has been certified by Intel Corp. to work with Intel's existing and next-generation chipsets at speeds of 800Mbps.
2006-09-05 Samsung starts 1Gbit DDR2 DRAM mass production
Samsung Electronics announced the mass production of 1Gbit DDR2 DRAM memory using 80nm process technology.
2005-08-15 Samsung speeds up DDR2, DDR1 memory production
Samsung Electronics Co. Ltd is quickly shifting from DDR1 (Double Data Rate 1) to DDR2 main memory.
2005-01-25 Samsung boosts DDR2 production for Intel
Samsung Electronics Co. Ltd recently announced that it will ramp production of its DDR2 SO-DIMMs (small outline, dual in-line memory modules) in time for Intel Corp.'s release of Mobile Intel 915 PM and 915 GM chipsets suited for notebook PCs.
2006-03-15 Samsung begins producing 80nm DDR2 memory
Samsung Electronics announced early this week it has begun volume production of double data rate (DDR)-2 DRAM chips using 80nm processes.
2005-10-20 Samsung announces 70nm-based 512Mb DDR2 SDRAM
Samsung Electronics announced that it has developed the first 512Mb DDR2 SDRAM using the 70nm process, which is said to be the smallest process technology yet applied to a DRAM device.
2004-05-12 Rambus offers interface IP for DDR, DDR2 DRAMs
Rambus for the first time is offering interface intellectual property for industry-standard double-data-rate, DDR2 and XDR DRAMs.
2006-11-09 Price steadies after rebound for DDR2 eTT, says DRAMeXchange
DRAMeXchange found evident rebound for DDR2 eTT (UTT) by 6.9 percent from Nov 3, stabilizing the price for the contract market.
2007-06-18 PowerQUICC DDR2 SDRAM controller register setting considerations
This document expands on the description of the DDR2 memory controller programmable registers in the reference manuals for Freescale's PowerQUICC processors.
2009-12-30 PCI Express-to-DDR2 SDRAM reference design
This application note introduces the dedicated PCI Express logic block implemented in Arria II GX FPGA hardware.
2006-12-18 Oscilloscope-based compliance tester rolls for DDR2
Test-and-measurement equipment supplier Agilent Technologies is debuting what it says is the industry's first oscilloscope-based DDR2 compliance test application.
2005-09-28 Micron's expanded Singapore facility to concentrate on DDR2, sensors
Micron Technology's expanded facility here will better position the firm to supply DDR2 and CMOS image sensor technology to an expanding Asian market, the company's local head said.
2005-07-22 Micron samples 2Gb DDR2 parts
Micron Technology announced that it is the first supplier to sample 2Gb double data rate 2 (DDR2) components to a select server customer.
2003-10-30 Micron releases DDR2 SDRAMS in FBGA packaging
Micron Technology Inc. has shipped what it claims is the industry's first 1Gb DDR2 SDRAM components.
2005-04-15 Micron obtains Intel validation of 4GB DDR2 RDIMMs
Micron Technology Inc. has received a validation from Intel for its 4GB DDR2 registered dual inline modules (DIMMs) and a high-density DDR2 module solution employing stacked component technology.
2003-09-19 Micron DDR2 modules back Intel platform
Micron Technology Inc. has announced that it will support Intel Corp.'s Lindenhurst dual processor server chipset.
2007-12-17 Micron claims 'smallest' 1Gbit DDR2 chip
Micron's new 68nm DRAM process, coupled with its 6F? technology, has enabled what is touted as the world's smallest production 1Gbit DDR2 memory with a die size of just 56mm?.
2007-05-08 Micron claims 'fastest' 1Gbit DDR2 memory modules
Micron has announced sample availability of 1Gbit DDR2 memory modules capable of running at 1066Mbpssaid to be the industry's fastest for a main memory.
2007-06-01 Lower-voltage DDR2 DRAMs target data center apps
Micron Technology Inc. recently launched low-voltage DDR2 DRAMs that aim to lower server power consumption.
2007-04-19 Low-voltage DDR2 DRAM memory module cuts server power draw
Micron claims the industry's first low-voltage DDR2 DRAM in RCC memory modules specifically designed to lower server power consumption.
2006-10-24 Low-profile DDR2 connector suits ATCA carrier boards
Tyco Electronics offers a low-profile DDR2 connector designed for the main memory requirements on Advanced Telecommunications Computer Architecture (ATCA) carrier boards.
2008-04-23 Low-latency DDR2 SO-DIMM targets notebook market
Kingston Technology announced it is first to offer high-performance, low-latency 667MHz DDR2 SO-DIMM notebook memory to the global market.
2007-02-27 Liquid-cooled DDR2 RDIMMs target HPC apps
SMART Modular Technologies has launched a family of liquid-cooled DDR2 RDIMMs that are designed to remove heat more effectively than conventional air-cooled RDIMMs that use fans or heat sinks.
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