1 Features

1? Two-Port USB 3.0 Compliant Hub, USBIF

TID#330000057

? USB 2.0 Hub Features

– Multi-Transaction Translator (MTT) Hub: Two

Transaction Translators

– Four Asynchronous Endpoint Buffers Per

Transaction Translator

? Supports Battery Charging

– CDP Mode (Upstream Port Connected)

– DCP Mode (Upstream Port Unconnected)

– DCP Mode Complies With Chinese

Telecommunications Industry Standard YD/T

1591-2009

? Support D+/D– Divider Mode

? Supports Operation as a USB 3.0 or USB 2.0

Compound Device

? Per Port or Ganged Power Switching and

Overcurrent Notification Inputs

? OTP ROM, Serial EEPRO,M or I2C/SMBus Slave

Interface for Custom Configurations:

– VID and PID

– Port Customizations

– Manufacturer and Product Strings (not by OTP

ROM)

– Serial Number (not by OTP ROM)

? Application Feature Selection Using Terminal

Selection or EEPROM/ or I2C/SMBus Slave

Interface

? Provides 128-Bit Universally Unique Identifier

(UUID)

? Supports On-Board and In-System OTP/EEPROM

Programming Through the USB 2.0 Upstream

Port

? Single Clock Input, 24-MHz Crystal or Oscillator

? No Special Driver Requirements; Works

Seamlessly on any Operating System With USB

Stack Support

? 48-Pin HTQFP Package (PHP)

2 Applications

? Computer Systems

? Docking Stations

? Monitors

? Set-Top Boxes

3 Description

The TUSB8020B is a two-port USB 3.0 compliant

hub. It provides simultaneous SuperSpeed USB and

high-speed/full-speed connections on the upstream

port and provides SuperSpeed USB, high-speed, fullspeed,

or low-speed connections on the downstream

ports. When the upstream port is connected to an

electrical environment that only supports high-speed

or full-speed/low-speed connections, SuperSpeed

USB connectivity is disabled on the downstream

ports. When the upstream port is connected to an

electrical environment that only supports fullspeed/

low-speed connections, SuperSpeed USB and

high-speed connectivity are disabled on the

downstream ports.

The TUSB8020B supports per port or ganged power

switching and overcurrent protection.

An individually port power controlled hub switches

power on or off to each downstream port as

requested by the USB host. Also when an individually

port power controlled hub senses an overcurrent

event, only power to the affected downstream port

will be switched off.

A ganged hub switches on power to all its

downstream ports when power is required to be on

for any port. The power to the downstream ports is

not switched off unless all ports are in a state that

allows power to be removed. Also when a ganged

hub senses an overcurrent event, power to all

downstream ports will be switched off.