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

Datasheet

2.2Buffer Types

BUFFER TYPE

 

DESCRIPTION

 

 

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.

 

Note:

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.

 

Note:

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

 

 

 

Revision 1.22 (09-25-08)

22

SMSC LAN9420/LAN9420i

 

DATASHEET