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MultiTRAK Technology
PortMap
PortSwap
TrueSpeed
PHYBoost
Footprint compatibility
On-chip Power-on reset (POR)
Integrated 3.3V to 1.8V regulator
Extended operating temperature
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
Only a single 3.3V supply required
Available industrial-temp grade SKUs to support systems requiring extended operating temperature of -40° to 85°C
FEATU RES BENEFITS
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.
Mobile PC Docking Stations
LCD Monitors/TVs
PC Motherboards
Gaming Consoles
Multi-function Printers
Cable/DSL Modems
Set-top Boxes
DVD/CD-ROM/DVR
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HDD Enclosures
Keyboards
KVM Switches
Server Front Panels
Point-of-Sale (POS) Terminals
IP Telephony
Automobile/Home Audio Systems
Industrial
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Target Applications
Features and Benefits
n Up to 60% space savings compared to
previously available devices
n 40% savings in power consumption vs.
prior SMSC devices
n On-chip ±8KV HBM ESD protection for
reducing BOM and cost
n Enhanced OEM configuration - 30+
programmable options via 12C EEPROM
or SMBUS
n Designed to meet -40º to 85ºC industrial-
temp requirements
n Available in 2/3/4-port versions to serve a
wide range of applications
Highlights