SMSC LAN9420i Manual De Usuario

Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface

Revision 1.22 (09-25-08)

22

SMSC LAN9420/LAN9420i

IS

Schmitt-triggered Input

O8

Output with 8mA sink and 8mA source current

O12

Output with 12mA sink and 12mA source current

OD12

Open-drain output with 12mA sink current

IPCI

PCI compliant Input 

OPCI

PCI compliant Output 

PU

50uA (typical) internal pull-up. Unless otherwise noted in the pin description, internal pull-ups 
are always enabled. 

Internal pull-up resistors prevent unconnected inputs from floating. Do not rely on 
internal resistors to drive signals external to LAN9420/LAN9420i. When connected 
to a load that must be pulled high, an external resistor must be added.

PD

50uA (typical) internal pull-down. Unless otherwise noted in the pin description, internal pull-
downs are always enabled. 

Internal pull-down resistors prevent unconnected inputs from floating. Do not rely 
on internal resistors to drive signals external to LAN9420/LAN9420i. When 
connected to a load that must be pulled low, an external resistor must be added.

AI

Analog Input

AIO

Analog bi-directional

ICLK

Crystal oscillator input

OCLK

Crystal oscillator output

P

Power and Ground pin