LAN9303 Datasheet, PDF (39/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
NUM
PINS
1
NAME
PLL +1.8V
Power Supply
Crystal Input
1
1
Crystal Output
Table 3.8 PLL Pins
SYMBOL
VDD18PLL
XI
XO
BUFFER
TYPE
DESCRIPTION
P
ICLK
OCLK
This pin must be connected to VDD18CORE for
proper operation.
See Note 3.7.
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.
External 25MHz crystal output.
Note 3.7 Please refer to the LAN9303/LAN9303i Reference Schematic and LANCheck Schematic
Checklist on the SMSC website for additional connection information.
NUM
PINS
5
NAME
+3.3V I/O
Power
Digital Core
+1.8V Power
2
Supply Output
Table 3.9 Core and I/O Power and Ground Pins
SYMBOL
VDD33IO
VDD18CORE
BUFFER
TYPE
DESCRIPTION
P
+3.3V Power Supply for I/O Pins and Internal
Regulator.
See Note 3.8.
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
Common
PAD
Ground
VSS
P
Ground
Note 3.8 Please refer to the LAN9303/LAN9303i Reference Schematic and LANCheck Schematic
Checklist on the SMSC website for additional connection information.
SMSC LAN9303/LAN9303i
39
DATASHEET
Revision 1.3 (08-27-09)