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.