USB5744 datasheet(15/51 Pages) MICROCHIP

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DS00001855L-page 15

USB5744

3.3

Buffer Types

TABLE 3-9:

BUFFER TYPES

Buffer Type

Description

Input

Schmitt-triggered input

Output with 6 mA sink and 6 mA source

O12

Output with 12 mA sink and 12 mA source

OD12

Open-drain output with 12 mA sink

50 µA (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 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.

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.

IO-U

Analog input/output as defined in USB specification

Analog input

ICLK

Crystal oscillator input pin

OCLK

Crystal oscillator output pin

PPower pin

Note:

Refer to Section 10.5, "DC Specifications" for individual buffer DC electrical characteristics.

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