AT43301 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT43301

Low-cost USB Hub Controller

Atmel Corporation 

Features

• Full Compliance with USB Spec Rev 1.1

• Four Downstream Ports

• Full-speed and Low-speed Data Transfers

• Bus-powered Controller

• Bus-powered or Self-powered Hub Operation

• Port Overcurrent Monitoring

• Port Power Switching

• 5V Operation with On-chip 3.3V Regulator

• 24-lead SOIC and 32-lead LQFP

1. Description

The AT43301 is a 5-port USB hub chip supporting one upstream and four down-

stream ports. The AT43301 connects to an upstream hub or host/root hub via Port0,

while the other ports connect to external downstream USB devices. The hub re-trans-

mits the USB differential signal between Port0 and Ports[1:4] in both directions. The

AT43301 is designed for very low-cost bus-powered or self-powered hub applications

and is available in a 24-lead SOIC and a 32-lead LQFP packages. The 32-lead ver-

sion of the AT43301, the AT43301-AC, has a 48 MHz clock input.

The AT43301 supports the 12 Mb/s full speed as well as 1.5 Mb/s slow speed USB

transactions. To reduce EMI, the AT43301’s oscillator frequency is 6 MHz even

though some internal circuitry operates at 48 MHz.

Low-cost USB

Hub Controller

AT43301

Figure 1-1. Pin Configurations

24-lead SOIC Top View

VCC

VSS

CEXT1

OSC1

OSC2

LFT

STAT

PWR

OVC

LPSTAT

TEST

SELF/BUS

AT43301-SC

1

24

2

23

3

22

4

21

5

20

6

19

7

18

8

17

9

16

10

15

11

14

12

13

NC

DP4

DM4

DP3

DM3

DP2

DM2

DP1

DM1

DP0

DM0

VSS

32-lead LQFP Top View

NC 1

DM4 2

DP4 3

48 4

VCC 5

VSS 6

CEXT1 7

NC 8

AT43301-AC

24 NC

23 DP0

22 DM0

21 VSS

20 NC

19 SELF/BUS

18 TEST

17 LPSTAT

1137J–USB–01/06

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