Schematic Review Template

Owned by Farris Matar
Last updated: Jul 07, 2022
2 min read

This page is meant to provide a list of things that should be checked when reviewing the schematic for a PCB. It is the designer’s responsibility to check for ALL of the things below themselves, then assign others to review their schematic.

Part Reviews

Reviewer Name

Manufacturer Part Number

Symbol Name

Footprint Name

Comments

Reviewer Name

Manufacturer Part Number

Symbol Name

Footprint Name

Comments

<Reviewer Name>

<Part Number>

<Symbol Name in Schematic Libs>

<Footprint Name in PCB Libs>

  • Every single new part that was used in the PCB and added to the libraries must be reviewed by both the designer and one other person, following the Part Review Checklist. This can be excepted for ceramic capacitors and chip resistors

  • If the reviewer notices any problems with the symbol or footprint, comments should go here, and the problems will need to be resolved by the designer

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Schematic Sheet Reviews

Sheet_Name.SchDoc (<Reviewer Name>)

In addition to the lists below, each individual schematic sheet should be reviewed by another person for correctness and clarity
It is up to the designer’s discretion as to what should be reviewed for each schematic sheet

Generic Schematic Reviews

Net Naming (<Reviewer Name>)

All major nets named
No duplicate net names, or nets with multiple net names
Differential pairs end with _N and _P
Active low signals are indicated with either a “_n” at the end or with overbar notation (using a “\” character after each letter in the net name, i.e. E\N\)

Wiring and Connections (<Reviewer Name>)

No 4 point connections
All unconnected pins have an ERC directive
Devices sharing an I2C or SPI bus must be simultaneously powered on/off (i.e. by powering them all off of the same power rail) - prevents unpowered devices from pulling the bus low
Lines that require pull ups are pulled up in exactly one place (not pulled up multiple times, or missing pull-ups)

Component Labels (<Reviewer Name>)

ICs show part number
Resistors show resistance value
Capacitors show capacitance and voltage rating
For capacitors, voltage rating is 2x higher than expected voltage for low-voltage nets (<12V), 1.5x higher for high-voltage nets (>12V)
Inductors show inductance and rated current
Ferrites show impedance @ frequency value
Diodes show part number, voltage rating, and current rating (if applicable). Exception is for LEDs, which only need part number

Design-for-Test (<Reviewer Name>)

All voltage rails have test points and an LED indicator
Enable/shutdown/reset/etc. lines for ICs have test points
Communication interfaces have test points (i.e. I2C, SPI, UART)
All sensor outputs have test points
Any other signals that might want to be checked during testing should have a test point