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Series resistor

Discussion in 'Electronic Design' started by eeh, May 18, 2005.

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  1. eeh

    eeh Guest


    Recently I have a DSP filter project. From the DSP evaluation module
    circuit I found that for almost all digital outputs there are 33 ohm
    resistors connecting in series before to the target pin. I wonder if it
    is necessary as it would spend much PCB space in my custom board.

  2. Robert Baer

    Robert Baer Guest

    Acts as a series termination, to "kill" reflections on the driven line.
    You obviously need some trace length to go from one IC to another; an
    0402 size chip will take no more space...
  3. eeh

    eeh Guest

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