USB2524 datasheet(1/57 Pages) SMSC

Teilenummer	USB2524

Bauteilbeschribung	USB MultiSwitchTM Hub

PDF	57 Pages

Scroll/Zoom	100%

Hersteller	SMSC [SMSC Corporation]

Direct Link	http://www.smsc.com

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SMSC USB2524

DATASHEET

Revision 1.91 (08-22-07)

Datasheet

PRODUCT FEATURES

USB2524

USB MultiSwitchTM Hub

USB 2.0 Compatible 4-Port Hub with two upstream

host port connections

—

Provides electronic reconfiguration and re-assignment

of any of its 4 downstream ports to either of two

upstream host ports (“on-the-fly”).

—

Allows multiple USB hosts to share peripherals and

enables a user to dynamically assign host ownership.

– Embedded Mode - 8 (predefined, OEM

programmable) configurations for port

assignment are selectable via three external

control signals.

– Peripheral Mode - Dedicated select pin for

every downstream port (total of 4), selectable

edge or level triggered in order to support a

wide range of possible switch configurations

and styles.

—

Each host has a dedicated Single Transaction

Translator (Single-TT) for supporting FS/LS devices, or

can also operate in Multi-TT mode where each

downstream port has a dedicated Transaction

Translator.

Downstream ports can be disabled or defined as non-

removable

Switching hub can be configured as compound

device for support of ‘embedded’ USB peripherals

Multiple LED modes for maximum implementation

flexibility

—

USB Mode - 2 Single-color LEDs for each downstream

port (total of 8 LEDs).

—

Host Ownership Mode - 8 Single-Color LEDs indicate

which upstream host each of the downstream ports are

assigned to.

—

Host Ownership & Port Speed Mode - 8 Dual-Color

LEDs are used to indicate which upstream host each of

the downstream ports are assigned to, while

simultaneously indicating downstream port connection

speed.

Enhanced configuration options available through

either a Single Serial I2C EEPROM, or SMBus Slave

Port

— VID/PID/DID

— Port Configuration

—

String Descriptors (each can support a maximum length

of 31 characters)

– Custom Manufacturer String

– Custom Product String

– Custom Serial String

—

Assignment of downstream ports to upstream hosts

—

Switching mechanism selection

Hardware Strapping options allow for configuration

without an external EEPROM or SMBus Host

—

Default VID/PID/DID, allows functionality when

configuration EEPROM is absent

Complete USB Specification 2.0 Compatibility

—

Includes USB 2.0 Hi-Speed Transceivers

—

High-Speed (480Mbits/s), Full-Speed (12Mbits/s) and

Low-Speed (1.5Mbits/s) compatible

—

Full power management with choice of Individual or

Ganged power control

On-Board 24MHz Crystal Driver Circuit or 24 MHz

external clock driver

Internal PLL for 480MHz USB 2.0 Sampling

Internal 1.8V Linear Voltage Regulator

Integrated USB termination and Pull-up/Pull-down

resistors

Internal Short Circuit protection of USB differential

signal pins

1.8 Volt Low Power Core Operation

3.3 Volt I/O with 5V Input Tolerance

56-Pin QFN Lead-free RoHS Compliant Package

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