Part Review Checklist

Owned by Farris Matar
Last updated: Sept 13, 2022
2 min read

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. Additionally, pin numbering should match the datasheet exactly
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 if part is an IC
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 except for 3D body
Pin 1 designator included on silkscreen (Top Overlay) if applicable
3D Body of the footprint added (may be exempted if unable to find one)