Integrated USB 2.0 Compatible 4-Port Hub

Datasheet

 

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 USB2504/USB2504A

15

Revision 2.3 (08-27-07)

 

DATASHEET