Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
Note: The current at VDDCR is either supplied by the internal regulator from current entering at
VDD2A, or from an external 1.2V supply when the internal regulator is disabled.
Note: Current measurements do not include power applied to the magnetics or the optional external
LEDs. The Ethernet component current is typically 41mA in 100BASE-TX mode and 100mA in
10BASE-T mode, independent of the 2.5V or 3.3V supply rail of the transformer.
Note 5.6 Calculated with full flexPWR features activated: VDDIO=1.8V & internal regulator disabled.
5.3.2
REF_CLK Out Mode
.
Table 5.2 Device Only Current Consumption and Power Dissipation (REF_CLK Out Mode)
VDDA3.3
POWER
PINS(MA)
VDDCR
POWER
PIN(MA)
VDDIO
POWER
PIN(MA)
TOTAL
CURRENT
(MA)
TOTAL
POWER
(MW)
POWER PIN GROUP
Max
Typical
Min
28
26
22
20
19
15
6.3
5.8
2.9
54
50
39
179
164
100BASE-T /W TRAFFIC
10BASE-T /W TRAFFIC
93
Note 5.7
Max
Typical
Min
9.9
8.8
7.1
13
12
10
6.4
5.6
3.0
30
26
20
96
85
41
Note 5.7
Max
Typical
Min
4.5
4.0
3.9
2.7
1.5
1.2
0.3
0.2
0
7.5
5.7
5.1
25
19
ENERGY DETECT POWER
DOWN
15
Note 5.7
Max
Typical
Min
0.4
0.4
0.4
2.5
1.3
1.0
0.2
0.2
0
3.1
1.9
1.4
10.2
6.3
GENERAL POWER DOWN
2.5
Note 5.7
Note: The current at VDDCR is either supplied by the internal regulator from current entering at
VDD2A, or from an external 1.2V supply when the internal regulator is disabled.
Note: Current measurements do not include power applied to the magnetics or the optional external
LEDs. The Ethernet component current is typically 41mA in 100BASE-TX mode and 100mA in
10BASE-T mode, independent of the 2.5V or 3.3V supply rail of the transformer.
Note 5.7 Calculated with full flexPWR features activated: VDDIO=1.8V & internal regulator disabled.
SMSC LAN8720A/LAN8720Ai
65
Revision 1.4 (08-23-12)
DATASHEET
SMSC [ SMSC CORPORATION ]
