Smsc LAN9512 User Manual download pdf (Page 19)

USB Hub with Integrated 10/100 Ethernet Controller

Datasheet

SMSC LAN9512 19 Revision 1.0 (04-20-09)

DATASHEET

2.2 Buffer 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

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 45 46

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Smsc LAN9512 User Manual Page 19