Re:PCB Layout Guidlines for Ethernet?

DeanErickson wrote:


Put another way... Can anyone tell me what factors were used in the selection of the part used on the LM36965 Evalutation Board? It uses a Pulse J3011G21DNL - See http://www.pulseeng.com/products/datasheets/J409.pdf

Here is one source of info. See the curious comments on slide 46 of http://www.scvemc.org/files/Ethernet_Magnetics_EMI.pdf
(his diagram seems reversed, however)

Is there a better choice of information out there?

His diagram isn't reversed, it's just a different kind of magnetics design. The Pulse J3011G21DNL is of the "2-Line CM Choke on the Cable Side" kind, as shown on slide 63 of the presentation.

Still waiting for that application note, Luminary...

Post edited by: matten, at: 2008/06/26 08:04