USB5906CTSLASHKD datasheet(20/63 Pages) MICROCHIP

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USB5906C

DS00003188B-page 20



2019 - 2021 Microchip Technology Inc.

3.4

Buffer Type Descriptions

TABLE 3-9:

POWER AND GROUND PIN DESCRIPTIONS

Name

Symbol

Buffer

Type

Description

+3.3V Power

Supply Input

VDD33

+3.3 V power and internal regulator input

Refer to Section 4.1, Power Connections for power con-

nection information

+1.2V Core

Power Supply

Input

VDD12

+1.2 V core power

Refer to Section 4.1, Power Connections for power con-

nection information.

Ground

GND

Common ground.

This exposed pad must be connected to the ground plane

with a via array.

TABLE 3-10:

USB5906 BUFFER TYPE DESCRIPTIONS

BUFFER

DESCRIPTION

Input.

Input with Schmitt trigger.

O12

Output buffer 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.

ICLK

Crystal oscillator input pin

OCLK

Crystal oscillator output pin

I/O-U

Analog input/output defined in USB specification.

I-R

RBIAS.

Note:

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

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