Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
8.1.2
Power Supply Diagram
Analog
Supply
3.3V
Power to
magnetics
interface.
LAN8720
24-QFN
19
6
VDDCR
VDDIO
VDD1A
1uF
CBYPASS
VDDDIO
Supply
9
CBYPASS
1
VDD2A
1.8 - 3.3V
CBYPASS
CF
R
C
24
RBIAS
15
nRST
12k
VSS
Figure 8.3 High-Level System Diagram for Power
8.1.3
Twisted-Pair Interface Diagram
49.9 Resistors
LAN8720
24-QFN
Analog
Supply
3.3V
Magnetic
Supply
2.5 - 3.3V
1
VDD2A
VDD1A
TXP
CBYPASS
19
21
CBYPASS
Magnetics
RJ45
1
2
3
4
5
6
7
8
75
75
20
23
TXN
RXP
22
RXN
1000 pF
3 kV
CBYPASS
Figure 8.5 Copper Interface Diagram
Revision 1.0 (05-28-09)
SMSC LAN8720/LAN8720i
DATA7S4HEET