USB2504 datasheet(11/42 Pages) MICROCHIP

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 2007 - 2016 Microchip Technology Inc.

DS000002250A-page 11

USB2504/USB2504A

VDDAPLL1P8

VDDA18PLL

+1.8V Filtered analog power for internal PLL.

If the internal regulator is enabled, then this pin must have

a 4.7

F (or greater) ±20% (ESR <0.1capacitor to VSS

VDDIO3P3

VDD33

+3.3V I/O power.

VDDA3P3

VDDA33

+3.3V Filtered analog power.

VSS

Ground.

TABLE 4-5:

BUFFER TYPE DESCRIPTIONS

Buffer

Description

Input.

IPD

Input, with a weak Internal pull-down.

IPU

Input, with a weak Internal pull-up.

Input with Schmitt trigger.

O12

Output 12mA.

I/O12

Input/Output, 12mA

IOSD12

Open drain….12mA sink with Schmitt trigger, and must meet I2C-Bus

Specification Version 2.1 requirements.

ICLKx

XTAL Clock Input

OCLKx

XTAL Clock Output

I-R

RBIAS

IO-U

Defined in USB Specification.

Note: Meets USB 1.1 requirements when operating as a 1.1-compliant

device and meets USB 2.0 requirements when operating as a 2.0-

compliant device.

AIO

Analog Input/output. Per PHY test requirements.

TABLE 4-4:

POWER, GROUND, AND NO CONNECT (CONTINUED)

Name

Symbol

Type

Function

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