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Dram chips

Discussion in 'Electronic Basics' started by Sky King, Nov 14, 2008.

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  1. Sky King

    Sky King Guest

    I have some older circuits (from the '80) that I would like to build.
    The logic chips are still available. I have one that uses 8-4164
    drams and one that uses 2-41464 drams. I can expand the ram the
    circuits uses to make them faster. If I swap the 4164's with 41256's
    will that work? Or if I swap the 41464's with 414256's will that

    Thank you for helping me out with any info.

    Sky King
  2. Lord Garth

    Lord Garth Guest

    You'll have additional address lines for the deeper memory and likely
    not for the wider memory. Most of these are CAS only
    sure the counter for the columns is the correct number of bits wide and
    the correct depth to properly refresh the array or you'll have no
    reliability. Don't forget decoupling capacitors near every IC.
  3. Sky King

    Sky King Guest

    Thanks for the info. I will have to check the refresh rate. Thanks
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