LAN8720AI datasheet(14/79 Pages) SMSC

14 / 79 page

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

Datasheet

Revision 1.4 (08-23-12)

SMSC LAN8720A/LAN8720Ai

DATASHEET

Table 2.6 Analog Reference Pins

NUM PINS

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

External 1%

Bias Resistor

Input

RBIAS

This pin requires connection of a 12.1k ohm (1%)

resistor to ground.

Refer to the LAN8720A/LAN8720Ai reference

schematic for connection information.

Note:

The nominal voltage is 1.2V and the

resistor will dissipate approximately

1mW of power.

Table 2.7 Power Pins

NUM PINS

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

+1.6V to

+3.6V

Variable I/O

Power

VDDIO

+1.6V to +3.6V variable I/O power

Refer to the LAN8720A/LAN8720Ai reference

schematic for connection information.

+1.2V Digital

Core Power

Supply

VDDCR

Supplied by the on-chip regulator unless

configured for regulator off mode via the

REGOFF configuration strap.

Refer to the LAN8720A/LAN8720Ai reference

schematic for connection information.

Note:

1 uF and 470 pF decoupling capacitors

in parallel to ground should be used on

this pin.

+3.3V

Channel 1

Analog Port

Power

VDD1A

+3.3V Analog Port Power to Channel 1

Refer to the LAN8720A/LAN8720Ai reference

schematic for connection information.

+3.3V

Channel 2

Analog Port

Power

VDD2A

+3.3V Analog Port Power to Channel 2 and the

internal regulator.

Refer to the LAN8720A/LAN8720Ai reference

schematic for connection information.

Ground

VSS

Common ground. This exposed pad must be

connected to the ground plane with a via array.

LAN8720AI Datasheet(PDF) 14 Page - SMSC Corporation

LAN8720AI Datasheet(HTML) 14 Page - SMSC Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79

Datasheet Download

Link URL