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.