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IBM designed, Jedec PC200/PC266 DDR DIMM Clock Reference Board

Wednesday, May 17, 2000 May 18, 2000 : CST Inc, DDRtester.com today announced at the DDR SDRAM Industry Summit held at the DoubleTree Hotel in San Jose, the availability of the new “DDR-DIMM Clock Reference Board” designed by IBM Micro electronic Division.

Current Jedec and industry de-facto do not provide a method for ensuring DDR memory module clock timing accuracy. This “Clock Reference Board” was designed to serve as a test vehicle especially for module designers and module manufacturers (purpose is to “fine tune” memory module assembly during validation), the reference board is also targeted as a qualification vehicle for PC system producers.

The Clock reference board consists of a clock generator which generate seven output buffer signals, three of the clock signals are routed to the DDR-DIMM module test socket and the rest of the lines are routed to the “Reference Net Circuit”.

An Oscilloscope is used for the waveform measurement at the DDR-SDRAM and this measured waveforms are then compared against measurement taken from the “Reference Net circuit” for time delays and skew. See illustration for details.

CST Inc will be building all the Clock Reference Boards in one batch to ensure consistency. A “Gold” Board will be maintained to support future builds.

CST had previously taken up the task of manufacturing and distributing the “PC100/PC133 DIMM clock reference board”.

Founded in 1983, CST designs, manufactures , markets and supports computer memory test software and hardware. CST pioneered the first low cost SIMM tester for computers in 1985. Since then, CST testers have become the standard for computer manufacturing industry, holding more than 70% of the market in memory module testers for computer manufacturers and third party memory module manufacturers. With its product lines of memory module tester and handler, CST is equipped to handle all aspects of memory module testing. CST has a comprehensive line of testers ranging from the low-volume service tester to the high-end, high-volume tester. In addition, CST also provides customization for proprietary module test fixtures.

For further information, visit us at www.DDRtester.com or call our Sales at (972) 241-2662.

By: CST Marketing
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