VCC width

Discussion in 'General Electronics Chat' started by aleksazr, May 17, 2010.

  1. aleksazr

    Thread Starter New Member

    May 16, 2010
    14
    0
    When I started designing PCBs, I was given an advice
    to route GND with 50mils and VCC with 25mils.

    But now I read on the net that VCC should be wide, also.

    I make two-layer digital boards only.

    If I now adjust my VCC tracks to 50mils,
    is there any chance of some problems?

    And should I adjust? All prior boards work...

    Maybe I should note that all my previous boards
    were built around discreet chips, GALs, SRAM and Z80,
    but am now moving towards 180 MHz ARM and FPGA.
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    The higher in speed you go, the more bandwidth you will need.

    Run your power rails as wide as you can. Use plenty of caps around the board to keep the rails reasonably quiet.
     
  3. aleksazr

    Thread Starter New Member

    May 16, 2010
    14
    0
    Ok, no problems with wider tracks...
    Thanks.
     
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