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TUSB2077A

7-Port Hub

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7-Port Hub

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7-Port Hub

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TUSB2077A

SLLS414F – MARCH 2000 – REVISED AUGUST 2015

TUSB2077A 7-Port Hub for the Universal Serial Bus With Optional

Serial EEPROM Interface

1 Features

2 Applications

1

•

Fully Compliant With the USB Specification as a

•

Computer Systems

Full-Speed Hub: TID #20240226

•

Docking Stations

•

Integrated USB Transceivers

3 Description

•

3.3-V Low-Power ASIC Logic

The TUSB2077A hub is a 3.3-V CMOS device that

•

Two Power Source Modes

provides up to seven downstream ports in compliance

–

Self-Powered Mode Supporting Seven

with the USB 2.0 specification. Because this device is

Downstream Ports

implemented with a digital state machine instead of a

microcontroller, no software programming is required.

–

Bus-Powered Mode Supporting Four

Fully compliant USB transceivers are integrated into

Downstream Ports

the ASIC for all upstream and downstream ports. The

•

All Downstream Ports Support Full-Speed and

downstream ports support full-speed and low-speed

Low-Speed Operations

devices

by

automatically

setting

the

slew

rate

•

Power Switching and Overcurrent Reporting Is

according to the speed of the device attached to the

Provided Ganged or Per Port

ports. The configuration of the BUSPWR terminal

selects either the bus-powered or self-powered mode.

•

Supports Suspend and Resume Operations

The introduction of the DP0 pull-up resistor disable

•

Suspend Status Pin Available for External Logic

terminal,

DP0PUR,

makes

it

much

easier

to

Power Down

implement

an

onboard

bus/self-power

dynamic-

•

Supports Custom Vendor ID and Product ID With

switching circuitry. The three-LED indicator control

External Serial EEPROM

output pins also enable the implementation of

visualized status monitoring of the hub and its

•

3-State EEPROM Interface Allows EEPROM

downstream ports. With these new function pins, the

Sharing

end equipment vendor can considerably reduce the

•

Push-Pull Outputs for PWRON Eliminate the Need

total board cost while adding additional product value.

for External Pullup Resistors

•

Noise Filtering on OVRCUR Provides Immunity to

Device Information(1)

Voltage Spikes

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Supports 6-MHz Operation Through a Crystal

TUSB2077A

LQFP (48)

7.00 mm × 7.00 mm

Input or a 48-MHz Input Clock

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

•

New Functional Pins Introduced to Reduce the

Board Material Cost

USB-Tiered Configuration Example

–

3 LED Indicator Control Outputs Enable

Visualized Monitoring of 6 Different Hub/Port

Status (HUBCFG, PORTPWR, PORTDIS)

–

Output Pin Available to Disable External Pullup

Resistor on DP0 for 15 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 48-Pin LQFP Package

•

JEDEC Descriptor S

−PQFP−G for Low-Profile

Quad Flatpack (LQFP).

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.