Tagged Questions

1
vote
0answers
70 views

How to route Gigabit Ethernet, remote PHY or remote RJ45 connector?

I need to design a 10/100/1000 BASE-T “backplane” board that contains multiple PHY outputs from Ethernet controller chips. On the board ,the LAN specifications are very strict in regard to how the ...
6
votes
2answers
441 views

Ethernet Without Magnetics?

How / can you connect Ethernet devices together without magnetics? How do you wire it up? What sorts of practical limitations are there on doing this? To clarify, I'm not trying to connect two ...
11
votes
3answers
313 views

Do magnetics connectors exist?

Conventional connectors, where the plug and socket have metal parts which touch, suffer from the following problems: Limited mating cycles or expensive plating. Impedance mismatch (relevant for high ...
0
votes
0answers
82 views

Two RJ45s one PHY

Is it possible connecting two RJ45s to a one port ethernet magnetics? If yes, Does it require just turns ratio adjustment or other issues have to be taken into account? Thanks!
2
votes
1answer
428 views

Which type of Ethernet magnetics should I choose for PoE?

I'm trying to find a suitable PoE MagJack for use with my Phy, KSZ8051MNL. The problem is that I can't find one with the same suggested magnetics topology. The closest one I can find has one extra ...
0
votes
2answers
280 views

Discrete Ethernet magnetics

Rather than using an Ethernet magnetics component, is it possible / reasonable to simply use individual isolating transformers? Inside the magnetics component, it's clearly made up of individual ...
4
votes
3answers
364 views

For remoting 1000Base-T ethernet connector, is it better to remote PHY from magnetics or magnetics from connector?

I'm in need of remoting the gigabit ethernet connector from the main board to a back end board that has all the other connectors. I plan on doing this with a high speed board to board connector ...
2
votes
1answer
2k views

Ethernet: how important is the magnetics topology?

I have some Ethernet issues with a set of boards (6/10 are bad). They're possibly just assembly house mistakes... but I'm very concerned about my magnetics jack. I could have sworn I saw a example ...