LAN9303 datasheet(39/366 Pages) SMSC

Part #	LAN9303

Description	Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

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Manufacturer	SMSC [SMSC Corporation]

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Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

Datasheet

SMSC LAN9303/LAN9303i

39

Revision 1.3 (08-27-09)

DATASHEET

Note 3.7

Please refer to the LAN9303/LAN9303i Reference Schematic and LANCheck Schematic

Checklist on the SMSC website for additional connection information.

Note 3.8

Please refer to the LAN9303/LAN9303i Reference Schematic and LANCheck Schematic

Checklist on the SMSC website for additional connection information.

Table 3.8 PLL Pins

NUM

PINS

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

1

PLL +1.8V

Power Supply

VDD18PLL

P

This pin must be connected to VDD18CORE for

proper operation.

See Note 3.7.

1

Crystal Input

XI

ICLK

External 25MHz crystal input. This signal can also

be driven by a single-ended clock oscillator. When

this method is used, XO should be left

unconnected.

1

Crystal Output

XO

OCLK

External 25MHz crystal output.

Table 3.9 Core and I/O Power and Ground Pins

NUM

PINS

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

5

+3.3V I/O

Power

VDD33IO

P

+3.3V Power Supply for I/O Pins and Internal

Regulator.

See Note 3.8.

2

Digital Core

+1.8V Power

Supply Output

VDD18CORE

P

+1.8V power from the internal core voltage

regulator. All VDD18CORE pins must be tied

together for proper operation.

See Note 3.8.

1

PAD

Common

Ground

VSS

P

Ground

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