AU6254 Datasheet, PDF (6/30 Pages) List of Unclassifed Manufacturers – USB2.0 Hub Controller

1.0 Introduction
1.1 Description
AU6254 is a fully compliant with the USB 2.0 hub specification and is designed to
work with USB host as a high-speed hub. Its built-in TT (Transaction Translator)
allows system to benefit combinational performance under the unbalanced traffic
condition.
AU6254 supports four USB downstream ports and one upstream port. Each
downstream port could be a device of high-speed, full-speed or low-speed traffic,
while the upstream port supports both high-speed and full-speed traffic. For each
downstream port it has individual power switch control built-in as over-current
sensing control.
In addition to the application as a stand-alone hub, AU6254 is also very suitable for
using in notebook and motherboard design to provide additional USB port. All these
product advantages should be attributed to its compliance to standards,
performance and low power consumption.
1.2 Features
• Fully compliant with USB Hub Specification version 2.0 and is also backward
compatible with USB Hub specification 1.1.
• Single chip USB 2.0 hub controller.
• Supports four bus-powered/self-powered downstream ports.
• Supports automatic switching between bus- and self-powered modes.
• Cost effective design using one transaction translator for all downstream ports.
• Two-color LED controls available for each downstream port to indicate the status
of each device port.
• Extra low power consumption.
• On chip internal pull-up and meets USB bus power regain emend pull down
resistors for all data line.
• Built-in USB 2.0 transceiver.
• Supports individual and gang modes of power management.
• Built-in power switch control for over current sensing control.
• Built-in 1.8V regulator for core logic.
• Embedded in PLL (Phase Lock Loop) circuit for 12MHz operation precision
• Supports external EEPROM interface for customized PID and VID
• Available in two different form factors: 48-pin LQFP package and 64-pin LQFP
package.
AU6254 USB2.0 Hub Controller V1.00W
Official Release_ Public
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