SMSC FlexPWR LAN8720 - Manual (Page 73)

Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
SMSC LAN8720/LAN8720i 73 Revision 1.0 (05-28-09)
DATASHEET
Chapter 8 Application Notes
8.1 Application Diagram
The LAN8720 requires few external components. The voltage on the magnetics center tap can range
from 2.5 - 3.3V.
8.1.1 RMII Diagram
Figure 8.1 Simplified Application Diagram
LAN8720
10/100 PHY
24-QFN
RMII
TXP
TXN
Mag RJ45
RXP
RXN
25MHz
XTAL1/CLKIN
XTAL2
TXD[1:0]
2
RXD[1:0]
RXER
2
RMII
LED[2:1]
2
Interface
MDIO
MDC
nINT
nRST
TXEN