USB Hub with Integrated 10/100 Ethernet Controller

Datasheet

2.2Buffer Types

 

 

Table 2.9 Buffer Types

 

 

 

BUFFER TYPE

 

DESCRIPTION

 

 

IS

Schmitt-triggered Input

 

 

IS_5V

5V Tolerant Schmitt-triggered Input

 

 

O8

Output with 8mA sink and 8mA source

 

 

OD8

Open-drain output with 8mA sink

 

 

O12

Output with 12mA sink and 12mA source

 

 

OD12

Open-drain output with 12mA sink

 

 

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 LAN9512. 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 LAN9512. 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 pin

 

 

OCLK

Crystal oscillator output pin

 

 

P

Power pin

 

 

 

SMSC LAN9512

19

Revision 1.0 (04-20-09)

 

DATASHEET