SMSC LAN8720i User Manual
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
Revision 1.0 (05-28-09)
74
SMSC LAN8720/LAN8720i
DATASHEET
8.1.2
Power Supply Diagram
8.1.3
Twisted-Pair Interface Diagram
Figure 8.3 High-Level System Diagram for Power
Figure 8.5 Copper Interface Diagram
LAN8720
24-QFN
RBIAS
24
VSS
19
12k
VDD1A
nRST
15
C
BYPASS
1
C
BYPASS
VDD2A
VDDIO
C
BYPASS
C
F
VDDDIO
Supply
1.8 - 3.3V
Analog
Supply
Supply
3.3V
C
9
Power to
magnetics
interface.
magnetics
interface.
R
VDDCR
6
1uF
Magnetics
LAN8720
24-QFN
1
VDD2A
C
BYPASS
21
TXP
TXN
Analog
Supply
Supply
3.3V
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
20
1000 pF
3 kV
3 kV
RJ45
75
75
23
RXP
RXN
22
C
BYPASS
19
VDD1A
C
BYPASS
49.9 Resistors
Magnetic
Supply
2.5 - 3.3V