USB Hub

Product Group

Atmel Rousset

Zone Industrielle

13106 Rousset Cedex

France

Tel: (+33)(0)4 42 53 60 00

Fax: (+33)(0)4 42 53 60 01

Headquarters

Corporate Headquarters

2325 Orchard Parkway

San Jose, CA 95131

USA

Tel: (+1)(408) 441 0311

Fax: (+1)(408) 436 4300

Europe

Atmel U.K. Ltd

Coliseum Business Centre

Riverside Way, Camberley

Surrey GU15 3YL, England

Tel: (+44)(0)(1276) 68 66 77

Fax: (+44)(0)(1276) 68 66 97

Asia

Atmel Asia Ltd

Room 1219

Chinachem Golden Plaza

77 Mody Road

Tsimshatsui East, Kowloon

Hong Kong

Tel: (+852) 272 19 778

Fax: (+852) 272 21 369

Japan

Atmel Japan KK

Tonetsu Shinkawa Bldg. 9F

1-24-8 Shinkawa

Chuo-Ku, Tokyo 104-0033

Japan

Tel: (+81) 3 3523 3551

Fax: (+81) 3 3523 7581

E-mail

literature@atmel.com

Web Site

http://www.atmel.com

Copyright Atmel Corporation 1998

Terms and product names may be

trademarks of others.

All figures in this brochure are

for illustrative purposes only.

See Atmel Databooks

for definitive figures.

03/98 - 1060A

The Atmel AT43301 USB Hub Controller is designed for use in very, low cost

self powered or bus powered USB hubs. Application for such hubs are as a

standalone hub for use with portable/notebook PCs, as well as an embedded

hub in peripherals such as keyboards. The AT43301 supports one upstream

port and four downstream ports. It handles all the hub protocols, thus off-

loading the user from the details of the USB operations. The chip is USB Spec

Rev 1.1 compliant and is available in a 24-pin SOIC Package.

AT43301 in a Self Powered Hub

AT43301 in a Bus Powered Hub

AT43301

VCC

GND

PWR

OVC

POWER SUPPLY

5V OUT

GND

IN

OUT

GND

PORT_POWER

U2

TO

DOWNSTREAM

DEVICE

PS5

GND

BUS_POWER

U1

CTL

FLG

SWITCH

GND

PORT_POWER

GND

PORT_POWER

GND

PORT_POWER

AT43301

VCC

GND

PWR

OVC

IN

OUT

GND

PORT_POWER

U2

TO

DOWNSTREAM

DEVICE

GND

BUS_POWER

U1

CTL

FLG

SWITCH

GND

PORT_POWER

GND

PORT_POWER

GND

PORT_POWER