SMSC Switch USB2514i User Manual

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 MultiTRAK™ technology that delivers industry-  
leading 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  
all USB251x controllers measures only 6x6mm and provides an ultra small footprint for  
space-constrained designs while allowing scalable port expansion from two to four ports.  
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  
n Enhanced OEM configuration - 30+  
programmable options via 12C EEPROM  
or SMBUS  
previously available devices  
n 40% savings in power consumption vs.  
prior SMSC devices  
n Designed to meet -40º to 85ºC industrial-  
temp requirements  
n On-chip 8KV HBM ESD protection for  
reducing BOM and cost  
n Available in 2/3/4-port versions to serve a  
wide range of applications  
Target Applications  
n Mobile PC Docking Stations  
n LCD Monitors/TVs  
n PC Motherboards  
n HDD Enclosures  
n Keyboards  
n KVM Switches  
n Gaming Consoles  
n Server Front Panels  
n Point-of-Sale (POS) Terminals  
n IP Telephony  
n Multi-function Printers  
n Cable/DSL Modems  
n Set-top Boxes  
n Automobile/Home Audio Systems  
n Industrial  
n DVD/CD-ROM/DVR  
Features and Benefits  
FEATURES  
BENEFITS  
MultiTRAK Technology  
Dedicated transaction translator (TT) for EVERY downstream port provides best-in-class performance  
Flexible port mapping and port disable sequence supports multiple-SKU platform designs  
Programmable USB differential-pair pin locations ease PCB design by aligning USB signal traces directly to connectors  
USB host/device connection speed indicator provides visual feedback on USB Hi/Full/Low-Speed connectivity  
Programmable USB transceiver drive strength for recovering signal integrity due to compromised system environment  
Common pin-out 2/3/4-port hubs in a 36QFN package enables flexible port expansion options without PCB redesign  
Provides proper power-on reset and saves BOM cost  
PortMap  
PortSwap  
TrueSpeed  
PHYBoost  
Footprint compatibility  
On-chip Power-on reset (POR)  
Integrated 3.3V to 1.8V regulator  
Extended operating temperature  
Only a single 3.3V supply required  
Available industrial-temp grade SKUs to support systems requiring extended operating temperature of -40° to 85°C  
 

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