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What type of RAM is this?

Discussion in 'Electronic Components' started by jamma-plusser, Dec 8, 2008.

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  1. Can't seem to find a datasheet for this one, it's in a PCB from 2003

    HY62WT081ED55C


    Thanks
     
  2. Eeyore

    Eeyore Guest

    At an inspired guess it's made by Hyundai. That might help.

    Graham
     
  3. Thanks guys. Should have said that it's 28-pin surface mount. I THINK
    it's a standard 62256 ( 32K * 8 ) but am not 100% certain.

    Going off at a tangent, what's a good, cheap, modern equivalent of the
    62256 ?
     
  4. Franc Zabkar

    Franc Zabkar Guest

    Even though the part is marked as "HY62WT081E", the actual part number
    is "HY62WT08081E".

    Here is a datasheet for the HY62WT08081E series:
    http://www.datasheets.org.uk/pdf/1669143.pdf

    Page 13 of the datasheet decodes the part number as ...

    HY62WT081E = part name, 2.7~5.5V
    D = Low Low Power
    55 = 55ns @ 4.5~5.5V, 70ns @ 2.7~3.6V
    C = Commercial (0 ~ 70 °C)

    - Franc Zabkar
     
  5. Excellent, many thanks for that. So why didn't the put complete number
    on the chip? For security purposes? It looks like the whole number
    could have been accomodated.

    Much appreciated anyhow - looks like it's compatible with the 62256,
    etc.
     
  6. Franc Zabkar

    Franc Zabkar Guest

    When AdrianC posted the URL of the "Hynix part number decoder", I
    thought that your number was missing an additional "08" code for the
    capacity, so I searched for "HY62WT08081".

    It may be instructive to see how other 8-bit Hynix SRAMs are marked.

    - Franc Zabkar
     
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