Suggestion Regarding RJ45 Connector PCB Footprint

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sakibnaz

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Hi.

For my project I want to use a RJ45 connector by TE Connectivity, PART 1-406541-1.

https://www.te.com/catalog/pn/en/1-406541-1

Attach is the Datasheet of the TE 1-406541-1 RJ45 connector which I'll use where you can see the PIN1 is in right side.

But see the below web link,which is very common RJ45.

https://www.sparkfun.com/datasheets/Prototyping/MagJack.pdf

Here PIN1 is in left side.

I am confused in the TE RJ45 connector Datasheet, its written that "Suggested PCB layout (Component Side)". What does the term "Component Side" means? Is it PCB Footprint hole view or RJ45 PIN view from bottom?

Hope you understand my confusion.

Please advise me.

Regards.
 

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Hi

you have component side and solder side .. (top or bottom)
 

Component side is the side that the component is on, solder side is the side that a PTH component is soldered on.

SMT components use the same side of course.

Beware when reading datasheets to check the side of the proposed footprint, mostly they will be explained but sometimes they may not say the side they are on.

This RJ45 is viewed from the top side of the PCB (if the component is mounted on the top).
 

Attach is the Datasheet of the TE 1-406541-1 RJ45 connector which I'll use where you can see the PIN1 is in right side.

But see the below web link,which is very common RJ45.
Here PIN1 is in left side.
Click to expand...

Yes, and both footprints are actually showing component side respectively top view.

But you apparently didn't pay attention to the different plug orientation of both jacks. RJ45 jacks can be either "tab up" or "tab down", resulting in effectively mirrored pin locations and some position differences.

First you have to decide for the intended plug orientation.
 
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    marce

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Thanks all for reply.

Yes, I missed the plug orientation. Two RJ45 connectors plug orientation is opposite, hence PIN number also gets opposite.

Thanks again.

Regards.
 

LOL, out of all the complex components in the world most PCB library mistakes are regarding quite simple connectors, and looking at data sheets such as shown. Often the problem with data sheets is that they are drawn using mechanical rules and dimensioning from which you have to extract the dimensions and relationships between dimensions required for the footprint design.
These connectors (and ZIF) are two of the most common as both have top and bottom entry versions where the pin 1 position differs.
 

It helps to name it so that the name or description tells the user the pin 1 location in this case.
 

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