Mitsubishi heeft bekend gemaakt dat het de eerste 512MB PC266 en PC200 DIMMs heeft gesampled . De modules hebben een 184 pins layout en zijn gebouwd rond 256Mbit DDR SDRAM chips, die zijn vervaardigd op een 0,18micron produktieproces. Mitsubishi verwacht komende April tot volume produktie over te kunnen gaan:
Jan. 18, 2000--Mitsubishi Electronics America's Electronic Device Group today announced sample availability of a 512-Mbyte registered dual in-line memory module (DIMM) that is compliant with JEDEC standards, meets PC266 and PC200 requirements, and is targeted to meet the large main memory needs of high-end servers, workstations, and PCs. Built using 18 pieces of Mitsubishi's discrete 256-Mbit PC266 or PC200 Double Data Rate (DDR) Synchronous DRAMs (SDRAMs), which are manufactured in a 0.18-um CMOS process technology, the 184-pin registered DIMM can achieve a peak data transfer rate of up to 2.1 Gbytes per second at a clock frequency of up to 133 MHz -- or up to 266 Mbits per second per data pin -- when used with a 64-bit data bus.
The 512-Mbyte registered DIMM samples are first available using 256-Mbit DDR SDRAMs in a by-4-bit configuration, which is ideally suited for server, workstation, networking, and communications system applications that require system-level error correction code (ECC) detection and correction with ``chip-kill'' protection. Mitsubishi is also now developing a 512-Mbyte DIMM using 256-Mbit DDR SDRAMs in a by-8-bit configuration.
``The availability of the 512-Mbyte registered DIMM demonstrates Mitsubishi's commitment to the needs of high-end server, workstation, and PC customers who want JEDEC-compliant, PC266 and PC200 DDR SDRAM module solutions as soon as possible,'' said Cecil Conkle, assistant vice president of DRAM marketing at Mitsubishi Electronics America Inc.
The 512-Mbyte DDR SDRAM based DIMM uses the JEDEC-standard stub series terminated logic (SSTL_2) interface. This interface typically features less than half the voltage swing of the low-voltage transistor-to-transistor logic (LVTTL) interface used in conventional SDRAM. The module offers 2.5-volt operation for low power dissipation. Input signals to the registered DIMM access memory chips through either the phase locked loop (PLL) or one of the register buffers on the DIMM.
Packaging, Availability and Pricing
Mitsubishi's 512-Mbyte DDR SDRAM based DIMM, MH64D72KLG, is available in a JEDEC-standard 184-pin module that is 133.35-mm x 43.18-mm. Samples of the DIMM will be available in February 2000, with volume production scheduled for April 2000. Sample pricing for the PC266 and PC200 versions of the DIMM are $7,048 and $5,334 each, respectively.