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The LM324 of the DSP world.

Discussion in 'Electronic Design' started by Bill Sloman, Sep 29, 2003.

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  1. Bill Sloman

    Bill Sloman Guest

    I'm looking for a cheap, easily available DSP chip - the equivalent of
    the LM324 for analog design.

    The application needs the wide accumulator and the accumulator up-date
    in one cycle that you get with most Harvard architecture DSP's, and we
    like the high clock rates they seem to offer, but what we really want
    is a DSP chip that is dirt-cheap and likely to stay available for a
    few years, thus a DSP chip that has achieved commidity status.

    Any suggestions? If any of the Texas Instrument or Analog Devices
    parts has achieved commoditiy status, it isn't obvious from their
    web-sites.

    The Farnell test suggests that the TMS320VC5402PGE100 is what we need
    - about $12 in a 144-pin TQFP package - but Farnell is notoriously
    slow in picking up on digital parts, and this part looks as if it
    might be cheap because it is verging on obsolescence (not attractive),
    rather than because it is being churned out in huge volumes (which is
    what we want).

    All suggestions very welcome.
     
  2. TheDoc

    TheDoc Guest


    The TI part is there.. last buy for me was $5.25 USD for 1000 qty.
    try ARROW

    It beleive it is used a lot in cell phones.. it has recently been "upgraded"
    with the 5402A
    that has a higher clock speed, but alas only one timer.. I will continue to
    use it as i only need one timer
    and 100MHZ operation.. so it's not a problem for me..



     
  3. Al Clark

    Al Clark Guest

    (Bill Sloman) wrote in
    You may want to check out the new Blackfin BF531/2/3 from Analog Devices.
    These parts are very powerful and not expensive.

    The current Analog commodity part is probably the 218x family in the 100
    pin QFP package. These parts are generally less than $10 in 1000 qty (As
    low as $5.75).
     
  4. Leon Heller

    Leon Heller Guest

    Also, the Blackfin will soon be available in PQFP rather than BGA, I've
    been told.


    Leon
     
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