Highlights

• USB 2.0 Compliant

• 480/12/1.5-Mbps operation

• 4 transaction translators

(‘Tetra’ Architecture)

• 56-lead QFN package

• Integrated components

1.5 k Ω pull-up resistor on D+

15 k Ω pull-down resistors on downstream ports

• Individual or ganged port power switching and over current detection

• Integrated phase-locked loop

• Dedicated LED ports

TetraHub

TM

USB 2.0 4-Port Hub

Reference Design – CY4602

USB 2.0 4-Port Hub

The TetraHub TM is the highest performance USB 2.0 hub solution available. Cypress offers a complete reference design for developing a fixed function 4-port USB 2.0

Hub that is production ready and USB 2.0 compliant.

This single chip design is based on the CY7C65640-LFC, offering a space saving and cost effective package. Because it is USB 2.0 compliant it is fully backward compatible with USB 1.1 systems. It provides for up to four downstream ports, and supports High Speed, Full Speed and Low Speed traffic. No firmware development is required for this design, thereby reducing design risk and time-to-market.

Our Reference Design Kits include a fully functional demonstration board as well as all of the design materials you will need to expedite the development of your custom product. Cypress provides faster time-to-market and the lowest overall system cost with our TetraHub Reference Design.

24 MHz Crystal

D+ D-

SPI

SCK

SPI

SD

SPD

CS

PLL

USB 2.0 PHY

USB Upstream Port

Hub Repeater

Serial

Interface

Engine

SPI Communication

Block

High Speed USB

Control Logic

Transaction Translator (x4)

Transaction Translator (x4)

TT RAM

TT RAM

Routing Logic

Downstream USB Port 1

Port

Status

USB 2.0

PHY

Port

Power

Control

Downstream USB Port 1

Port

Status

USB 2.0

PHY

Port

Power

Control

Downstream USB Port 1

Port

Status

USB 2.0

PHY

Port

Power

Control

Downstream USB Port 1

Port

Status

USB 2.0

PHY

Port

Power

Control

Driving the Communications Revolution TM www.cypress.com

17 April 2002

TetraHub

TM

Reference Design

Transaction Translators

Cypress Semiconductor Corp.

3901 North First Street

San Jose, CA 95134

408.943.2600 408.943.6848 fax

800.858.1810 (toll-free in U.S.)

Press “1” to reach your local sales rep

When compared to a USB 1.1 hub, a USB 2.0 hub functions more like a host controller, using “transaction translators” to convert Low and Full Speed traffic to High Speed, instead of just passing it through. With a single transaction translator, bandwidth must be shared among downstream Low and Full Speed devices. Cypress’s unique design, integrating four transaction translators, allows us to provide the highest performing hub chip on the market, supporting the full bandwidth for every downstream Low and Full Speed device.

High Speed

480Mpbs

Cypress TetraHub

Solution with 4 TTs

All Other

Solutions (1 TT)

High Speed

480 Mpbs

480 Mbps

Dedicated

12 Mbps

Dedicated

1.5 Mbps

Dedicated

12 Mbps

High Speed Device Full Speed Device Low Speed Device Full Speed Device

TetraHub

TM

Reference Design Kit Contents

The TetraHub

TM

Reference Design Kit includes:

• CY7C65640 based demonstration unit

• 5VDC, 2.5A wall power supply

• USB cable

• Datasheet and Design Notes

• Hardware files

Schematics

Bill of Materials

Gerber and Orcad Source Files

Full Speed Device

Shared 12Mbps!

480 Mbps

Low Speed Device Full Speed Device High Speed Device

Product ordering information

For assistance in ordering, contact your local Cypress Sales Representative. Call toll-free in the U.S. (800)-858-

1810 or visit our web site at www.cypress.com

. Online resources for locating your sales representative, as well as on-line ordering are available under the link How to Buy Cypress Products .

Reference Design Kit Number Based on Cypress Part…

CY4602 CY7C65640-LFC

Cypress (with logo) is a trademark of Cypress Semiconductor Corporation and Driving the Communications Revolution is a trademark of Cypress Semiconductor Corporation.

The names of any other companies, products, or services mentioned herein are for identification purposes only and may be trademarks, registered trademarks, or service marks of or may be copyrighted by their respective holders. Cypress Semiconductor Corporation assumes no responsibility for customer product design and assumes no responsibility for infringement of patents or rights of others that may result from Cypress assistance, and no product licenses are implied.

© Copyright 2001 Cypress Semiconductor Corporation. All rights reserved.

For more information, visit us at: www.cypress.com