AM3359 ICE RJ45 Magnetics

Patrick Ruf

Other Parts Discussed in Thread: TLK110

Hello,

I have a question about the used RJ45 connectors in the AM335x ICE board design.
The used type is 5-6605728-8 or 5-6605728-1 from TE. As of the datasheet it uses asymmetrical magnetics for NIC configuration (does not support Auto-MDI/MDIX).
Did TI choose this type on purpose or does an other RJ45 connector with integrated magnetics for 10/100Base-T will work as well (for example 1840642-3 from TE)?
Is there any special requirement for the EtherCAT application?

Link to the connectors:
http://www.te.com/catalog/pn/en/1840642-3?RQPN=1840642-3
http://www.te.com/catalog/pn/en/5-6605728-8?RQPN=5-6605728-8

Thanks.

Best regards,
Patrick

over 13 years ago

0 Thomas Mauer over 13 years ago

TI__Expert 5490 points

Hi Patrick,

We mainly choose the RJ45 w/ magnetic due to cost reason. For upcoming boards we plan to use a version of the RJ45 connector w/ magnetic supporting the auto-MDI/MDIX feature.

Please excuse the delay in the response.

Regards,

Thomas

0 Patrick Ruf over 13 years ago in reply to Thomas Mauer

Genius 5115 points

Hi Thomas

Thanks for the reply. Just for clarification: Is it right to say that a connector with symmetric magnetics (like the type 1840642-3 from TE, please see schematic below) will also work for EtherCAT and will support MDI/MDIX feature?

Best regards,
Patrick

0 Thomas Mauer over 13 years ago in reply to Patrick Ruf

TI__Expert 5490 points

Hi Patrick,

Yes, this is our understanding as well. When the magnetic are symmetrical, it does not matter how auto-MDI/MDIX will route to connection through the RJ45.

Regards,

Thomas

0 Louis-Joseph over 11 years ago in reply to Thomas Mauer

Prodigy 60 points

Hi,

Similar here, we use a vertical RJ45 connector that supports 10/100 Base-T, AutoMDIX from Stewart connector :

belfuse.com/.../SI-46001-F.pdf

Would this connector work properly if connected to the TLK110 similar as the TMDICE3359 dev board ?

Regards,
Louis

0 Patrick OFarrell over 11 years ago in reply to Louis-Joseph

TI__Mastermind 31600 points

Louis,

In the "Technical Documents" section of the TLK110 product folder (www.ti.com/.../tlk110), you can find the TLK1XX Design & Layout Guide. The guide include a list of magnetics requirements that you can compare against your connector datasheet.

Patrick

0 Louis-Joseph over 11 years ago in reply to Patrick OFarrell

Prodigy 60 points

Patrick,

That should work for me as well, thank you very much for the feedback!

Regards,
Louis

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AM3359 ICE RJ45 Magnetics