Integrated USB 2.0 Compatible 3-Port Hub

Datasheet

Table 4.4 Power, Ground, and No Connect (continued)

 

NAME

SYMBOL

 

TYPE

FUNCTION

 

 

 

 

 

 

 

VDD3P3

VDD33CR

 

 

+3.3V I/O and Core power.

 

CORE

 

 

 

 

 

PLL

 

 

 

 

 

 

 

 

 

 

 

VSS

VSS

 

 

Ground.

 

 

 

 

 

 

 

 

 

 

Table 4.5 Buffer Type Descriptions

 

 

 

 

 

 

 

BUFFER

 

 

 

DESCRIPTION

 

 

 

 

 

 

I

Input.

 

 

 

 

 

 

IPD

Input, with a weak Internal pull-down.

 

 

 

 

 

IPU

Input, with a weak Internal pull-up.

 

 

 

 

 

 

IS

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.

 

 

 

 

 

 

SMSC USB2503/USB2503A

13

Revision 2.3 (08-27-07)

 

DATASHEET