SMSC FlexPWR LAN8720 - Manual (Page 75)

Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
SMSC LAN8720/LAN8720i 75 Revision 1.0 (05-28-09)
DATASHEET
8.2 Magnetics Selection
For a list of magnetics selected to operate with the SMSC LAN8720, please refer to the Application
note “AN 8-13 Suggested Magnetics”.
http://www.smsc.com/main/appnotes.html#Ethernet%20Products