SMSC USB3250 User Manual

SMSC USB3250

Revision 1.7 (05-11-07) 

„

USB-IF "Hi-Speed" certified to USB 2.0 electrical 

specification

„

Interface compliant with the UTMI specification 

(60MHz 8-bit unidirectional interface or 30MHz 16-bit 
bidirectional interface)

„

Supports 480Mbps High Speed (HS) and 12Mbps 

Full Speed (FS) serial data transmission rates

„

Integrated 45

Ω and 1.5kΩ termination resistors 

reduce external component count

„

Internal short circuit protection of DP and DM lines

„

On-chip oscillator operates with low cost 12MHz 

crystal

„

Robust and low power digital clock and data recovery 

circuit

„

SYNC and EOP generation on transmit packets and 

detection on receive packets

„

NRZI encoding and decoding

„

Bit stuffing and unstuffing with error detection

„

Supports the USB suspend state, HS detection, HS 

Chirp, Reset and Resume

„

Support for all test modes defined in the USB 2.0 

specification

„

Draws 72mA (185mW) maximum current 

consumption in HS mode - ideal for bus powered 
functions

„

On-die decoupling capacitance and isolation for 

immunity to digital switching noise

„

Available in a 56-pin QFN package

„

Full industrial operating temperature range from

-40

o

C to +85

o

C (ambient)

The Universal Serial Bus (USB) is the preferred
interface to connect Hi-Speed PC peripherals.

„

Digital Still and Video Cameras

„

MP3 Players

„

External Hard Drives

„

Scanners

„

Entertainment Devices

„

Printers

„

Test and Measurement Systems

„

POS Terminals

„

Set Top Boxes