USB251x Family High-Performance, Low-Power, Small Footprint USB 2.0 Hub Controller Family for PC, Embedded and Consumer Applications SMSC's USB251x is a family of versatile, cost-effective and power-efficient USB 2.0 hub controllers. Leveraging SMSC's innovative MultiTRAKTM technology that delivers industryleading data throughput in mixed-speed USB environments, the USB251x family is designed for applications that demand low power and a small footprint without compromising on performance. Well-suited for consumer and mobile applications, all members of the USB251x family are available in space-saving packages. The common 36-pin package shared among the 2/3/4-port hub controllers measures only 6x6mm and provides an ultra small footprint for space-constrained designs while allowing scalable port expansion from two to four ports. The 7-port USB2517 comes in a space-efficient 9x9mm 64-pin package. Over 30 programmable features, including SMSC's unique PortMap, PortSwap, TrueSpeed and PHYBoost are designed to aid system designers in simplifying PCB layout and optimizing bill-of-material cost. Highlights n Up to 60% space savings compared to previously available devices n 40% savings in power consumption vs. prior SMSC devices n Enhanced OEM configuration - 30+ programmable options via 12C EEPROM or SMBUS n Designed to meet -40 to 85C industrial- n Enhanced EMI rejection and ESD protection temp requirements n Available in 2/3/4/7-port versions to serve a wide range of applications Target Applications Mobile PC Docking Stations HDD Enclosures LCD Monitors/TVs Keyboards PC Motherboards KVM Switches Gaming Consoles Server Front Panels Multi-function Printers Point-of-Sale (POS) Terminals Cable/DSL Modems IP Telephony Set-top Boxes Automobile/Home Audio Systems DVD/CD-ROM/DVR Industrial Features and Benefits FEATURES BENEFITS MultiTRAK Technology Dedicated transaction translator (TT) for EVERY downstream port provides best-in-class performance PortMap Flexible port mapping and port disable sequence supports multiple-SKU platform designs PortSwap Programmable USB differential-pair pin locations ease PCB design by aligning USB signal traces directly to connectors TrueSpeed USB host/device connection speed indicator provides visual feedback on USB Hi/Full/Low-Speed connectivity PHYBoost Programmable USB transceiver drive strength for recovering signal integrity due to compromised system environment Footprint compatibility Common pin-out 2/3/4-port hubs in a 36QFN package enables flexible port expansion options without PCB redesign On-chip Power-on reset (POR) Provides proper power-on reset and saves BOM cost Integrated 3.3V to 1.8V regulator Only a single 3.3V supply required Extended operating temperature Available industrial-temp grade SKUs to support systems requiring extended operating temperature of -40 to 85C SMSC MultiTRAKTM Technology Single-TT Hub Throughput (KB per sec) 600 500 400 300 200 100 0 *with a minimum of four Full-Speed bulk mass storage devices on a 4-port hub TrueSpeed is a USB host/device port status indicator to provide visual feedback on connection speed. Per-port, three-color LED drivers indicate the speed of connected USB host and devices - Hi-Speed (480 Mbps), FullSpeed (12 Mbps) and Low-Speed (1.5 Mbps). PHYBoost enables programmable four-level USB signal drive strengths in downstream port transceivers. PHYBoost attempts to restore USB signal integrity that has been compromised by system level variables such as poor PCB layout, long cables, etc. The graphics at the right show an example of Hi-Speed USB eye diagrams before (PHYBoost at 0%) and after (PHYBoost at 12%) signal integrity restoration in a compromised system environment. Which USB251x Family Member Is Right For Your Design? USB2512 USB2512i USB2513 USB2513i USB2514 USB2514i USB2517 USB2517i 7 7 MultiTRAK Technology PortMap SMSC Literature #CP-HUB-037-03/09-3 PortSwap TrueSpeed PHYBoost I2C/SMBus -40 to 85C Range 36QFN (6x6 mm) 48QFN (7x7 mm) 64QFN (9x9 mm) RoHS-compliant For more information visit www.smsc.com or call 1.800.443.SEMI SMSC 80 Arkay Drive, Hauppauge, NY 11788 For RoHS compliance and environmental information, please visit www.smsc.com/rohs 3 4 Logical Connection P1: P2: P3: P4: Physical Connection P1 P2 P0 P3 P4 Connected Connected Disabled Disabled Disabled Connected Disabled Connected USB PORT VIRTUALIZATION Chip D+ C31 J2 USB Connector DD+ D- DD+ D+ + LED D+ D- Before Boost J2 USB Connector Chip D- C28 PortSwap adds per-port programmability to USB differential-pair pin locations. PortSwap allows direct alignment of USB signals (D+/D-) to connectors avoiding uneven trace length or crossing of the USB differential signals on the PCB. 2 Number of downstream Full-Speed connections C25 PortMap provides flexible port mapping and disable sequences. The downstream ports of USB251x hubs can be reordered or disabled in any sequence to support single-platform, multiple-SKU systems in managing component population options. For any port that is disabled, the USB251x automatically reorders the remaining ports to match the USB host controller's port numbering scheme. 1 C26 MultiTRAK utilizes a dedicated TT per port to maintain consistent Full-Speed data throughput regardless of the number of active downstream connections. MultiTRAK outperforms conventional USB 2.0 hubs with a single TT in USB Full-Speed data transfers by up to 100%*, effectively doubling the amount of data throughput for every downstream port. # Downstream Ports Multi-TT Hub 700 High-Speed Full-Speed Low-Speed After Boost Copyright (c)2009 SMSC or its subsidiaries. All rights reserved. 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 and MultiTRAK is a trademark 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. (03/09)