Note: The USB2504 is not recommended for new designs. The USB2514 is the suggested replacement device for this product.

	General Description
	Applications
	Block Diagram
	Data Sheet, Application Notes, Drivers and Design Tools

General Features

	Compliant with USB2.0 Specification
	Hub Controller IC with Four Downstream Ports
	MultiTRAK™ Technology Provides One Transaction Translator Per Port
	Default Configuration with Pin Selectable Options
	Flexible OEM Configuration Options
	64-Pin TQFP lead-free RoHS compliant package

Hardware Features

	Integrated 1.8V regulator
	Integrated Termination and Pull-Up/Pull-Down Resistors
	Internal Short Circuit Protection of DP and DM Lines
	On-Chip Oscillator Uses Low Cost 24MHz Crystal
	Supports Ganged or Individual Over-Current Protection and Power Control
	3.3V I/O with 5V tolerance
	Pin-to-pin Compatible with USB20H04

OEM Selectable Features

The 4-Port Hub supports several OEM selectable features:

	Customize Vendor ID, Product ID, and Device ID
	Select whether the hub is part of a compound device (When any downstream port is permanently hardwired to a USB peripheral device, the hub is part of a compound device)
	Select the presence of a permanently hardwired USB peripheral device on a port by port basis
	Configure the delay time for filtering the over-current sense inputs
	Configure the delay time for turning on downstream port power
	Configure the polarity of down stream port power control signals
	Indicate the maximum current that the 4-port hub consumes from the USB upstream port
	Indicate the maximum current required for the hub controller

Pin Selectable Options for Default Configuration

	Select Downstream Ports as Non-Removable Ports
	Select Downstream Ports as Disabled Ports
	Enable/Disable Downstream Port LED Indicators
	Select Downstream Port Power Control and Over-Current Detection on a Ganged or Individual Basis
	Select Downstream Port Power Control Polarity

General Description

The USB2504 4-port hub controller is fully compliant with the USB2.0 Specification and does not require firmware development. When connected to a USB high-speed host, the four downstream ports can operate at low-speed (1.5Mb/s), full-speed (12Mb/s), or high-speed (480Mb/s). As required by the USB2.0 Specification, the USB2504 is fully backward compatible with legacy USB full-speed hosts.

A default configuration is available in the USB2504 following a reset. This configuration may be sufficient for some applications when it is desired to save the expense of an EEPROM. The controller may be configured from a microcontroller or an external EEPROM. When using the microcontroller interface, the USB2504 appears as a SMBus slave device. The EEPROM interface supports a 2-wire I2C device.

All required resistors on the USB ports are integrated into the USB2504. This includes all series termination resistors on D+ and D- pins and all required pull-down and pull-up resistors on D+ and D- pins. The over-current sense inputs for the downstream ports have internal pull-up resistors.

Applications

USB2.0 hub controllers may be used in a number of applications:

	LCD monitors and TVs
	Multi-function USB peripherals
	PC mother boards
	Set-top boxes, DVD players, DVR/PVR
	Printers and scanners
	PC media drive bay
	Portable hub boxes
	Mobile PC docking
	Embedded systems

USB2504 Block Diagram

USB2504/USB2504A Data Sheet, Application Notes, Drivers and Design Tools

Description	File Name	File Size	Date
USB2504/USB2504A Product Brief	2504db.pdf	102K	8/27/07
USB2504/USB2504A Data Sheet	2504.pdf	554K	8/27/07
Evaluation Board
EVB-2504     Schematic, Orcad 7.2     Schematic, PDF     Bill of Materials, PDF     User Guide, PDF	evb2504.dsn evb2504.pdf evb2504bom.pdf evb2504user.pdf	5043K 98K 64K 108K	11/9/04 11/9/04 11/9/04 6/26/07
Customer Reference Board
EVB-2504-CRB     Schematic, Orcad 7.2     Schematic, PDF     Bill of Materials, PDF     User Guide, PDF	evb2504crb.dsn evb2504crb.pdf evb2504crbbom.pdf evb2504crbuser.pdf	5003K 88K 64K 80K	11/9/04 11/9/04 11/5/04 7/10/07
Application Notes
Application Note 11-0: Migrating the USB20H04 to the USB2504	an110.pdf	287K	5/11/04
Application Note 11-12: Configuring the USB2504 Via SMBus	an1112.pdf	339K	9/12/06
Application Note 12-8: PCB Layout Guide for USB2504	an128.pdf	342K	3/31/05
Other Information
Configuration Utility for Hub EEPROM Data v1.0.0.9	e2promapp.msi	5167K	12/5/07
Using the Adobe® Acrobat® Reader	aacrobat.html