I hope someone can shed some light in this, I am laying out a Ethernet to PI zero HAT and will be using the enc28j60 controller from microchip. People have reported getting 2.8mbps up and down speed on average with cheap modules form china with same chip.
My question is will impedance matching and differential parts make a big difference on traces 14.20 mm in length?
- Copper 0.035mm T
- Trace width 15 mil
- trace <> trace space 4 mil
- FR 4 material
- 1.55mm thick
- 2 Layer
When I do the impedance matching and calculations this will give me 107 Ohm Differential.