Sorry for the automatic translation. I’m learning to use Kicad and I created a project using IC MAX6818. I downloaded the footprint from https://www.ultralibrarian.com/, indicated by the manufacturer itself (Analog Devices). When I run the PCB DRC, I encounter some errors, so I create a new project with only the MAX6818, without any tracks, but the following errors continue:
"Clearance violation (netclass ‘Default’ clearance 0.200mm; actual 0.1500mm) on all pads.
I believe this happens due to the small spacing between the pads and the minimum spacing configured by default in Kicad, but I don’t know where I can fix this.
Can I ignore these errors?
you are better not to.
you probably have to setup proper Design rules → contstrains in your design,
see file → board setup
It’s a standard SSOP-20 package. It’s in the standard KiCAD libraries as SSOP-20_3.9x8.7mm_P0.635mm. You don’t need to download footprints from anywhere.
The clearance on this package is more than 0.2mm. Try with the KiCAD footprint and check if you still have the errors.
And as @Claudio.Lorini said - before you start anything check the board setup it if complies with your board manufacturer.
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Thanks in advance for the answers and help. Analyzing the datasheet, I believe that the best match is SSOP-20_5.3x7.2mm_P0.65mm (the dimensions of the MAX6818 are (5.2-5.38)x(7.07-7.33)mm . I just did another test with this standard library, but the DRL keeps generating the same error (“netclass ‘Default’ clearance 0.200mm; actual 0.1500mm”). 0.15mm clearance must be a feature of this package. I don’t understand anything about Kicad, but I think the only way to remove this error or reconfigure Kicad to accept a 1.5mm clearance. Do you agree?
Correct. The footprint pad-to-pad clearance is 0.15mm which translates to 5.9 mil. Before you set your constraints to match this, you should make sure the board house can do this at the price point you expect. 5.9mil is roughly 1.6% smaller than the 6mil every board house can do nowadays, including the cheap ones. So it might work out = they might not complain.
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Thank you very much. According to the board house website, the minimum clearance is 0.127mm, so it should work.Once the project is almost done, can I change these constraints? Where do I change these settings in Kicad 6?
You can change that at any time you wish. It is in Board Setup → Constraints
It worked 
. Thank you all for your attention.
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