 USB2524
USB MultiSwitch™ Hub
 General Features
 |
Compliant with USB 2.0 Specification |
|
Hub controller IC with two upstream ports and four downstream ports |
|
MultiTRAK™ technology provides one transaction translator per port |
|
Default configuration with pin selectable options |
|
Four flexible downstream port switching modes |
|
Flexible OEM configuration options |
|
56-pin QFN 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 individual over-current protection and power control |
|
3.3V I/O with 5V tolerance |
OEM Selectable Features
The 4-Port Hub supports several OEM selectable features:
|
Customize vendor ID, product ID, device ID, and product string |
|
Port switching modes and host ownership of downstream ports |
|
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) |
|
Programmable LEDs to support standard green/amber port status or port speed (HS/FS/LS) |
|
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 |
ORDERING INFORMATION
Order Number(s):
USB2524-ABZJ for 56-pin QFN Lead-Free RoHS Compliant Package |
General Description
USB2524 is the industry's first USB switching hub that combines a USB Hi-Speed hub and switching functionality in a single device. Equipped with two upstream ports and four downstream ports, USB2524 enables USB device sharing and switching between two USB hosts without "cable swapping". Requiring no more than standard USB hub driver support, the USB2524 appears as a 4-port USB hub to either USB host system and supports standard USB topology.
Device Sharing and Switching
|
Per-port switching provides maximum device sharing functionality |
|
Flexible switching modes ease system design |
|
Programmable auto-switch mode enables unique applications |
High Throughput
|
MultiTRAK architecture provides dedicated TT for every downstream port |
|
Maximum USB full-speed data rate at 12 Mbps per port even under full load |
|
Aggregate 960 Mbps maximum data rate when both Hi-Speed hosts are active |
Minimum Software Overhead
|
Appears as a standard USB 2.0 hub controller on either host system |
|
Requires no more than standard USB hub-class driver support already native in most operating systems |
|
Standard USB connect and disconnect behavior as device switched from one host to the other |
Ease of Integration
|
Small 8x8 mm 56QFN package occupies minimum PCB space |
|
Flexible configuration options ease embedded system design |
|
USB-IF certified silicon building block ensures full USB compliance |
Applications
USB2524 USB MultiSwitch hub may be used in a number of applications:
|
Desktop PC drive-bays |
|
Mobile PC dock stations and port replicators |
|
All-in-one and photo printers |
|
LCD monitors |
|
KVM switches |
|
USB device sharing peripherals |
|
Set-top boxes |
|
DVD/HDD recorders and players |
|
Any USB dual-role host and device systems |
USB2524 Block Diagram
 USB2524 Data Sheet, Application Notes,
Drivers and Design Tools
*Note: These links are provided under the terms and conditions of SMSC's Web Site Use Agreement. Please refer to Legal Information. Please note that any statements, opinions, estimates or forecasts regarding SMSC or SMSC's products or performance made in these linked-to articles are those of the respective authors or linked-to publications alone and do not constitute or represent statements, opinions, estimates, forecasts or predictions of SMSC or its management. SMSC does not by its linking to or referencing such linked-to articles imply its endorsement of or concurrence with any statements, opinions, estimates, forecasts, information, conclusions or recommendations contained in or implied by any of such articles. SMSC is not responsible for any content of, or any errors in, any of such articles. Any use of or reliance on any of such articles, or any statements, information, or other content contained in any of such articles, is at your own risk.
Although the information in this document has been checked and is believed to be accurate, no responsibility is assumed for
inaccuracies. SMSC reserves the right to make changes to product descriptions and specifications at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order. Products may contain design defects or errors known as anomalies which may cause a product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC's website at http://www.smsc.com. SMSC and the SMSC logo are registered trademarks of Standard Microsystems Corporation ("SMSC"). Other names mentioned may be trademarks of their respective holders. All claims made herein speak as of the date of this material. The company does not undertake to update such statements. (2/09) |
