USB4624 datasheet(20/58 Pages) MICROCHIP

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USB 2.0 HSIC Hi-Speed 4-Port Hub Controller

Datasheet

DS00001717A-page 20

 2014 Microchip Technology Inc.

3.3

Buffer Type Descriptions

Table 3.3 Buffer Types

BUFFER TYPE

DESCRIPTION

Schmitt-triggered input

I_RST

Reset Input

I_SMB

I2C/SMBus Clock Input

Output with 8 mA sink and 8 mA source

OD8

Open-drain output with 8 mA sink

O12

Output with 12 mA sink and 12 mA source

OD12

Open-drain output with 12 mA sink

HSIC

High-Speed Inter-Chip (HSIC) USB Specification, Version 1.0 compliant input/output

50 µA (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 the device. When connected to a load

that must be pulled high, an external resistor must be added.

50 µA (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 the device. When connected to a

load that must be pulled low, an external resistor must be added.

AIO

Analog bi-directional

ICLK

Crystal oscillator input pin

OCLK

Crystal oscillator output pin

Power pin

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