1 Features
1• Fully Compliant With the USB Specification as a
Full-Speed Hub: TID #30220242
• Integrated USB Transceivers
• 3.3-V Low-Power ASIC Logic
• One Upstream Port and 2 or 3 Programmable
Downstream Ports
– Total Number of Ports (2 or 3) Selected by
Input Pin
– Total Number of Permanently Connected Ports
Is Selected by 2 Input Pins
• Two Power Source Modes
– Self-Powered Mode
– Bus-Powered Mode
• All Downstream Ports Support Full-Speed and
Low-Speed Operations
• Power Switching and Overcurrent Reporting Is
Provided Ganged or Per Port
• Supports Suspend and Resume Operations
• Suspend Status Pin Available for External Logic
Power Down
• Supports Custom Vendor ID and Product ID With
External Serial EEPROM
• 3-State EEPROM Interface Allows EEPROM
Sharing
• Push-Pull Outputs for PWRON Eliminate the Need
for External Pullup Resistors
• Noise Filtering on OVRCUR Provides Immunity to
Voltage Spikes
• Supports 6-MHz Operation Through a Crystal
Input or a 48-MHz Input Clock
• Output Pin Available to Disable External Pullup
Resister on DP0 for 3 ms After Reset or After
Change on BUSPWR and Enable Easy
Implementation of Onboard Bus/Self-Power
Dynamic Switching Circuitry
• No Special Driver Requirements; Works
Seamlessly With Any Operating System With USB
Stack Support
• Available in 32-Pin HLQFP Package With a 0.8-
mm Pin Pitch (JEDEC − S-PQFP-G For Low-
Profile Quad Flat Pack)

2 Applications
• Computer Systems
• Docking Stations

3 Description
The TUSB2036 hub is a 3.3-V CMOS device that
provides up to three downstream ports in compliance
with the USB 2.0 specification. Because this device is
implemented with a digital state machine instead of a
microcontroller, no firmware programming is required.
Fully-compliant USB transceivers are integrated into
the ASIC for all upstream and downstream ports. The
downstream ports support both full-speed and lowspeed
devices by automatically setting the slew rate
according to the speed of the device attached to the
ports. The configuration of the BUSPWR pin selects
either the bus-powered or the self-powered mode.
The introduction of the DP0 pullup resistor disable
pin, DP0PUR, makes it much easier to implement an
onboard bus/self-power dynamic-switching circuitry.
With the new function pin, the end-equipment vendor
can reduce the total board cost while adding
additional product value.