System Overview
23
TIDUES1A – October 2019 – Revised February 2020
Copyright © 2019–2020, Texas Instruments Incorporated
EMC Compliant 10/100-Mbps Ethernet PHY Reference Design With IEEE
802.3at Type-1 (
≤
12.95 W) PoE-PD
technique is to use plane coupling capacitor values (for example, from 1000 pF to 4700 pF).
Depending on available board space, place one set of capacitors on each side of the Ethernet
magnetic.
Table 10. Differential Signal Trace Length From Magnetics to RJ45 Connector on PSE Side Board
MDI DIFFERENTIAL
PAIR NAME
TRACE LENGTH FROM MAGNETICS TO RJ45 CONNECTOR ON PSE SIDE BOARD
TX_OUT_P
1106.097 mils
TX_OUT_M
1063.192 mils
RX_OUT_P
1236.934 mils
RX_OUT_M
1202.549 mils
Figure 20. Recommended 10/100 Mbps Twisted Pair Interfaces and Bob Smith Termination for non-PoE
Port as on PSE Side Board
Figure 21. Recommended 10/100 Mbps Twisted Pair Interfaces and Bob Smith Termination for PoE Port
as on PSE Side Board
