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In order to avoid issues with symbols and footprints from going to the fabrication stage, part reviews will be introduced. Part reviews should be completed during the schematic review for each new part that was designed for the project. It is the project owner’s responsibility to keep track of the parts they added to the libraries and ensure they are reviewed alongside the schematic.

Schematic Symbol Checklist

  • Schematic has a footprint mapped to it
  • Schematic should be done in mils
  • Pins should only come out from the left and right sides. An exception is made for op-amps and FETs
  • Parts should show ALL pins - i.e. if a MOSFET has 4 drain pins, all 4 should be included as separate pins
  • Power should be in the top left. If the part is a voltage translator, input power should be in the top left, and output power should be in the top right
  • GND should be in the bottom right
  • Proper designator should be used for the part
  • Active low pins indicated with an overbar notation or with a “_n” following the pin name
  • Pin names should be visible if the part is an IC. Symbol pin names should match pin names used in the datasheet
  • Description should include the description copied from Digikey
  • Supplier link must be included
  • Parameters included in the parameters table. The required parameters for all parts are: Manufacturer 1, Manufacturer Part Number 1, Supplier 1, Supplier Part Number 1, Package
    • For capacitors, Value and Voltage Rating parameters required
    • For resistors, Value parameter required
    • For inductors, Value, Current Rating, and Saturation Current parameters required
  • Required parameters are visible
    • For diodes, FETs, ICs, and inductors, Manufacturer Part Number should be visible
    • For diodes and inductors, Current Rating should be visible (if applicable)
    • For diodes and capacitors, Voltage Rating should be visible
    • For resistors, capacitors, and inductors, Value should be visible

PCB Footprint Checklist

  • Avoid using 0402 or similarly sized components (for reference, 0402 components are about 0.1mm x 0.05mm). Do NOT use 0201 components
  • Footprint name should include package name and package dimensions in mm
  • Correct pad sizes and locations
  • Corner radius for pads should be 15%
  • Pads included on Top Layer
  • Silkscreen included on Top Overlay layer
  • Nothing included on the Mechanical 1 layer
  • Pin 1 designator included on silkscreen (Top Overlay) if applicable
  • 3D Body of the footprint added (may be exempted if unable to find one)

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