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- Decoupling caps, PCB layout 9 answers
I always read about decoupling CAPs should be near to MCU pins, but how much near? If we are talking about very small caps of 0201 dimensions, wich distance is good from MCU power pin?
Look at this example:
Each grid block it's 5mil of distance, decoupling cap was placed at 5mil from MCU power pin and this it's minimum distance I can get from my PCB manufacturer. As you can see I found some difficults to layout adjacent pins, also on reflow this small cap can slide(that happens to me) on MCU pins and this is problematic to solve. (note that big via is a 13mil size and seems very big near 0201 package)
But this 5mils I can get are really necessary? Can I go to 10mil or 15 mils? or place in vertical position this cap?