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TUSB8020B

SLLSEF6C – JULY 2014 – REVISED JUNE 2017

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Copyright © 2014–2017, Texas Instruments Incorporated

Table of Contents

1

Features .................................................................. 1

2

Applications ........................................................... 1

3

Description ............................................................. 1

4

Revision History..................................................... 2

5

Description (continued)......................................... 2

6

Pin Configuration and Functions ......................... 3

7

Specifications......................................................... 6

7.1

Absolute Maximum Ratings ..................................... 6

7.2

ESD Ratings.............................................................. 6

7.3

Recommended Operating Conditions ....................... 6

7.4

Thermal Information .................................................. 6

7.5

3.3-V I/O Electrical Characteristics ........................... 7

7.6

Power-Up Timing Requirements ............................... 7

7.7

Hub Input Supply Current ......................................... 8

8

Detailed Description .............................................. 9

8.1

Overview ................................................................... 9

8.2

Functional Block Diagram ......................................... 9

8.3

Feature Description................................................... 9

8.4

Device Functional Modes........................................ 12

8.5

Register Maps ......................................................... 13

9

Application and Implementation ........................ 25

9.1

Application Information............................................ 25

9.2

Typical Application .................................................. 25

10

Power Supply Recommendations ..................... 30

10.1

Power Supply ........................................................ 30

10.2

Downstream Port Power ....................................... 30

10.3

Ground .................................................................. 30

11

Layout................................................................... 31

11.1

Layout Guidelines ................................................. 31

11.2

Layout Example .................................................... 32

12

Device and Documentation Support ................. 34

12.1

Community Resources.......................................... 34

12.2

Trademarks ........................................................... 34

12.3

Electrostatic Discharge Caution ............................ 34

12.4

Glossary ................................................................ 34

13

Mechanical, Packaging, and Orderable

Information ........................................................... 34

4 Revision History

Changes from Revision B (March 2017) to Revision C

Page

•

Added SMBUS Programming current to the Hub Input Supply Current table........................................................................ 8

•

Added Note to the SMBus Slave Operation section ............................................................................................................ 12

Changes from Revision A (July 2014) to Revision B

Page

•

Replaced the Absolute Maximum Ratings table..................................................................................................................... 6

Changes from Original (July 2004) to Revision A

Page

•

Changed device status to production data ............................................................................................................................ 1

5 Description (continued)

The TUSB8020B downstream ports provide support for battery charging applications by providing battery

charging connected downstream port (CDP) handshaking support. It also supports a dedicated charging port

(DCP) mode when the upstream port is not connected. The DCP mode supports USB devices which support the

USB Battery Charging and the Chinese Telecommunications Industry Standard YD/T 1591-2009. In addition, an

automatic mode provides transparent support for BC devices and devices supporting Divider Mode charging

solutions when the upstream port is unconnected.

The TUSB8020B provides terminal strap configuration for some features including battery charging support, and

also provides customization though OTP ROM, I2C EEPROM or through an I2C/SMBus slave interface for PID,

VID, and custom port and phy configurations. Custom string support is also available when using an I2C

EEPROM or the I2C/SMBus slave interface.

The device is available in a 48-pin HTQFP package and is offered in a commercial version (TUSB8020B) for

operation over the temperature range of 0°C to 70°C and in an industrial version (TUSB8020BI) for operation

over the temperature range of –40°C to 85°C.