Add ATX 20pins and 24 pins

[jneiva08]

ATX v1.x 20 pins
https://pinouts.ru/Power/atxpower_pinout.shtml

ATX v2.x 24 pins
https://pinouts.ru/Power/atx_v2_pinout.shtml

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• Provide a URL to a datasheet for the symbol(s) you are contributing
• An example screenshot image is very helpful
• Ensure that the associated footprints match the official footprint library
  • A new fitting footprint must be submitted if the library does not yet contain one.
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[cpresser]

Hi,

a few questions and suggestions

• Is there a real datasheet? I found this one: https://web.aub.edu.lb/pub/docs/atx_201.pdf , but none for 1.x. It would be nice to have official ones so we can verify the pins/names
• why did you call them ATX12_? what does the 12 indicate?
• KLC says positive power should go to the top, but I think we can consider them as outputs. A LDO in the current lib has its output also on the right side. So I am okay with that.
• PS_ON for the 20pin connector seems to be wrong. At least the .pdf above has it at pin16 as well. AFAIK there are ATX-PSUs that have a 20+4 pin connector, so they are compatible with both versions. That also suggests that the first 20pins should not change. stupid me. Looked at the pin-numbering of the connector. The numbers of the pins in the 2nd row all shit by 2 when going from 20->24pin connector.
• Description and Keywords should be populated

[chschlue]

@cpresser
Not sure if anything more official than https://www.intel.com/content/dam/www/public/us/en/documents/guides/power-supply-design-guide.pdf#page=26 is freely available.

The 12 probably refers to ATX12V.

The names are wrong anyway, the 24-pin connector was introduced in ATX12V v2.2, so 20-pin is ATX <= 2.1. This also means your datasheet link is fine for checking the first symbol.

Edit: Footprints should be Connector_Molex:Molex_Mini-Fit_Jr_5566-20A_2x10_P4.20mm_Vertical and Connector_Molex:Molex_Mini-Fit_Jr_5566-24A_2x12_P4.20mm_Vertical respectively if I'm not mistaken.

[jneiva08]

@cpresser @chschlue , have renamed the symbol names to be easy to understand.

In the motherboard normally can find the vertical connector, you can find on last one are horizontal

[cpresser]

Thanks for changing the datasheets. The new ones look way better.

• Can you please add #page=13 anchors to the .pdf link? (ofc with the correct page number)
• Lets rethink the naming. They are both ATX12V since both have a 12V rail. How about just adding the pin-numers to name? Like ATX-20 and ATX-24. Similar to those symbols:
  
• PWR_OK should be on the right side, since its an output.
• Please move PS_ON# to the top of the left side.
• Please fix the other errors reported by travis
• Is there a reason you ordered the voltages on the right side the way you did? My first idea would be to sort them ascending, with -12V at the bottom. But any other scheme is also fine as log as it is not arbitrary.

[jneiva08]

@cpresser

Have reorganized the pins and changed the name, but atx-24 can't center it without going to 1.27mm grid.

Screenshots:
ATX-20

ATX-24

I don't know if the footprint filter is the best. and it is giving error because of datasheet i don't know why.

[cpresser]

This is the change you are looking for to fix the travis error.

Delete the visible datasheet-field in the editor window to get this result.

The footprint-filters look good. I tested them im cvPCB and they worked fine.

[jneiva08]

@cpresser , have already made the fix.

[jneiva08]

Hi, @cpresser @chschlue , still need to make more changes?

[cpresser]

Sorry for the delay.

I gave it another look and found a small issue with the -5Vrail:

• Add a -5V pin also for the 20-pin version (on pin 18 afaik). According to wikipedia it was made obsolete in ATX 1.3 but was present for older PSU.
• Make the two symbols the same size, so one can be used as drop-in-replacement for the other
• Rename -5V to indicate it is not always available. perhaps -5V/NC. Otherwise designers might depend on the voltage to be available which might not be true.

The current naming-scheme is also compatible with the upcoming ATX12VO system. It would be called ATX-10 according to the pin-count and thus not create a collision.
https://www.intel.com/content/dam/www/public/us/en/documents/guides/single-rail-power-supply-platform-atx12vo-design-guide.pdf

[jneiva08]

@cpresser Have already made both symbols size and pin compatible, also renamed pin 18 from ATX-20.

[cpresser]

looks good. thanks!

[jneiva08]

thanks for your time