MEMORY

DDR Overview Double Data Rate (DDR) SDRAM is the latest Memory Module technology approved by Joint Electron Device Engineering Council (JEDEC). The size and structure are similar to conventional Single Data Rate (SDR) SDRAM module but works differently. With a one-open-key and 184-pins PCB design, DDR module reads data on both the upper and lower frequencies of each clock cycle, which stands for the data rate is doubled. It may also burst the peak bandwidth up to 2.1GB(DDR266, 133MHz) per second. DDR module can deliver superior memory performance, and its low 2.5V operating voltage is complied with Stub Series Terminated Logic - 2 (SSTL-2) standard. There is no doubt that DDR module is a perfect design for a variety of applications, which need mass-capacity and high-speed data storage.