LAN8720AI datasheet(65/79 Pages) SMSC

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Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support

Datasheet

SMSC LAN8720A/LAN8720Ai

Revision 1.4 (08-23-12)

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

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.

Table 5.2 Device Only Current Consumption and Power Dissipation (REF_CLK Out Mode)

POWER PIN GROUP

VDDA3.3

POWER

PINS(MA)

VDDCR

POWER

PIN(MA)

VDDIO

POWER

PIN(MA)

TOTAL

CURRENT

(MA)

TOTAL

POWER

(MW)

100BASE-T /W TRAFFIC

Max

6.3

179

Typical

5.8

164

Min

2.9

Note 5.7

10BASE-T /W TRAFFIC

Max

9.9

6.4

Typical

8.8

5.6

Min

7.1

3.0

Note 5.7

ENERGY DETECT POWER

DOWN

Max

4.5

2.7

0.3

7.5

Typical

4.0

1.5

0.2

5.7

Min

3.9

1.2

5.1

Note 5.7

GENERAL POWER DOWN

Max

0.4

2.5

0.2

3.1

10.2

Typical

0.4

1.3

0.2

1.9

6.3

Min

0.4

1.0

1.4

2.5

Note 5.7

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