USB2517I-JZX - SMSC - Datasheet.Live

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

FEATURES 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

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.

Mobile PC Docking Stations ■

LCD Monitors/TVs ■

PC Motherboards ■

Gaming Consoles ■

Multi-function Printers ■

Cable/DSL Modems ■

Set-top Boxes ■

DVD/CD-ROM/DVR ■

HDD Enclosures ■

Keyboards ■

KVM Switches ■

Server Front Panels ■

Point-of-Sale (POS) Terminals ■

IP Telephony ■

Automobile/Home Audio Systems ■

Industrial ■

Target Applications

Features and Benefits

■ Up to 60% space savings compared to

previously available devices

■ 40% savings in power consumption vs.

prior SMSC devices

■ Enhanced EMI rejection and ESD

protection

■ Enhanced OEM conﬁguration - 30+

programmable options via 12C EEPROM

or SMBUS

■ Designed to meet -40º to 85ºC industrial-

temp requirements

■ Available in 2/3/4/7-port versions to serve

a wide range of applications

Highlights

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

SMSC Literature #CP-HUB-037-03/09-3

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 ex-

pressly 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 war-

ranted 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 cus-

tomer. 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)

Which USB251x Family Member Is Right For Your Design?

SMSC MultiTRAK™ Technology

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.

*with a minimum of four Full-Speed bulk mass storage devices on a 4-port hub

700

600

500

400

300

200

100

Throughput (KB per sec)

Number of downstream Full-Speed connections

1 2 3 4

Single-TT Hub Multi-TT Hub

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.

PortSwap adds per-port programmability to USB differential-pair pin loca-

tions. 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.

P1: Connected

P2: Connected

P3: Disabled

P4: Disabled

Disabled

Connected

Disabled

Connected

Logical

Connection

USB PORT VIRTUALIZATION

Physical

Connection

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), Full-

Speed (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.

High-Speed

Full-Speed

Low-Speed

LED

D+

D-

Chip

D-

D+

C31J2

D-

D+

USB

Connector

C28

Chip

D+

D- D-

D+

C25 C26

USB

Connector

Before Boost After Boost

# Downstream Ports

MultiTRAK Technology

PortMap

PortSwap

TrueSpeed

PHYBoost

I2C/SMBus

-40° to 85°C Range

36QFN (6x6 mm)

48QFN (7x7 mm)

64QFN (9x9 mm)

RoHS-compliant

USB2512 USB2512i USB2513 USB2513i USB2514 USB2514i USB2517 USB2517i