SMSC USB3250 User Manual

USB3250

Hi-Speed USB Device
Transceiver with UTMI
Interface

PRODUCT FEATURES

 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 45Ω 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

o

C to +85oC (ambient)

-40

Data Brief

Applications

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

SMSC USB3250 PRODUCT PREVIEW Revision 1.7 (05-11-07)

Hi-Speed USB Device Transceiver with UTMI Interface

ORDER NUMBER:

USB3250-ABZJ FOR 56 PIN, QFN LEAD-FREE ROHS COMPLIANT PACKAGE, 8 X 8 X 0.85MM

80 ARKAY DRIVE, HAUPPAUGE, NY 11788 [phone], FAX [phone]

Copyright © 2007 SMSC or its subsidiaries. All rights reserved.

Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for
construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC
reserves the right to make changes to specifications and product descriptions 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 to the purchaser of the described semiconductor devices any licenses under any patent
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Revision 1.7 (05-11-07) 2 SMSC USB3250

PRODUCT PREVIEW

Hi-Speed USB Device Transceiver with UTMI Interface

General Description

The USB3250 provides the Physical Layer (PHY) interface to a USB 2.0 Device Controller. The IC is
available in a 56 pin QFN.

The USB3250 is a USB 2.0 physical layer transceiver (PHY) integrated circuit. SMSC's proprietary
technology results in low power dissipation, which is ideal for building a bus powered USB 2.0
peripheral. The PHY can be configured for either an 8-bit unidirectional or a 16-bit bidirectional parallel
interface, which complies with the USB Transceiver Macrocell Interface (UTMI) specification. It
supports 480Mbps transfer rate, while remaining backward compatible with USB 1.1 legacy protocol
at 12Mbps.

All required termination for the USB 2.0 Transceiver is internal. Internal 5.25V short circuit protection
of DP and DM lines is provided for USB compliance.

While transmitting data, the PHY serializes data and generates SYNC and EOP fields. It also performs
needed bit stuffing and NRZI encoding. Likewise, while receiving data, the PHY de-serializes incoming
data, stripping SYNC and EOP fields and performs bit un-stuffing and NRZI decoding.

Block Diagram

DATABUS16_8

RESET

SUSPENDN

XCVRSELECT

TERMSELECT

O

P

M

O

D

E

[

:

1

LINESTATE[1:0]

CLKOUT

0

:

]

5

1

A

[

T

D

A

TXVALID

A

R

T

D

E

Y

X

A

L

V

D

I

H

X

R

I

L

D

V

A

C

I

A

V

T

X

E

R

R

X

E

R

O

R

R

VDD3.3

VDD1.8

PWR

CONTROL

TX

LOGIC

TX State
Machine

Parallel to

Serial

Conversion

Bit Stuff

NRZ

Encode

]

0

HS_DRIVE_ENABLE

RX

LOGIC

*

UTMI Interface

RX State
Machine

Serial to
Parallel

Conversion

Bit Unstuff

NRZI

Decode

Recovery Unit

Recovery

Elasticity

XO

XI

PLL and

XTAL OSC

RPU_EN

VPO

VMO

OEB

HS_DATA

HS_CS_ENABLE

VP
VM

Clock

Clock

and

Data

Buffer

MUX

1.5k

FS
TX

HS
TX

RX

SE+

SE-

RX

HS
RX

TX

FS

FS

FS

System

Clocking

Ω

DP

DM

BIASING

Bandgap Voltage Reference

Current Reference

RBIAS

HS

SQ

Figure 1 USB3250 Functional Block Diagram

SMSC USB3250 3 Revision 1.7 (05-11-07)

PRODUCT PREVIEW