UPD301A

DS00002838B-page 6

 2018-2019 Microchip Technology Inc.

1.2

Buffer Types

1.3

References

• USB Power Delivery: https://www.usb.org/document-library/usb-power-delivery.

• USB Type-C™ Specification: ihttps://www.usb.org/document-library/usb-type-cr-cable-and-connector-specifica-

tion-revision-14-march-29-2019

TABLE 1-2:

BUFFER TYPES

Buffer Type

Description

I

Input

IS

Schmitt-triggered input

O2

Output with 2 mA sink and 2 mA source

OD2

Open-drain output with 2 mA sink and 2 mA source

O8

Output with 8 mA sink and 8 mA source

PD

200kΩ (typical) internal pull-down.

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.

AI

Analog input

AO

Analog output

AIO

Analog bidirectional

P

Power pin

Note:

Refer to Section 5.5, "DC Characteristics," on page 28 for the electrical characteristics of the various buf-

fers.