Footprint ->two Dimensions of bq20z95

Discussion in 'General Electronics Chat' started by aamirali, Dec 11, 2013.

  1. aamirali

    Thread Starter Member

    Feb 2, 2012
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  2. #12

    Expert

    Nov 30, 2010
    16,284
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    That's 4.50/4.30
    minimum and maximum dimensions in millimeters.

    That's an amazing chip! 44 pins of, "Knows every milliamp hour into and out of 2 to 4 lithium cells with less than 1% error at every point in their life, during every charge and discharge, at any time or temperature..." How did we survive all these years just charging our batteries when they got weak?
     
    Last edited: Dec 11, 2013
  3. aamirali

    Thread Starter Member

    Feb 2, 2012
    415
    1
    then what value ideally I should take. Should I take center point like if 4.50/4.30 then I should take 4.4mm
     
  4. t06afre

    AAC Fanatic!

    May 11, 2009
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    Use the standard footprint for that package in your PCB software as your IC use a standard IC package. But anyway this will guide you.
    http://www.cypress.com/?docID=31451
    If you are unsure just print the footprint out on paper in size 1:1 then place the chip ontop and see how it fits. But remember EDS protection then doing so
     
  5. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,770
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    You shouldn't be designing a circuit board or anything for that matter until you understand simple tolerances and how they can/will effect the final end product.
     
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