LX7203-15ISM Datasheet LX7203-15ISM, LX7203-22ISM | P1-P3

LX7203-xx

P

RODUCTION

D

ATA

S

HEET

Microsemi

Integrated Products Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 1

WWW.Microsemi .COM

EMI Filter & ESD Protection for Up Stream USB

Ports

Rev. 1.1d, 2005-05-18

TM

®

DESCRIPTION

The LX7203 is an integrated

Universal Serial Bus (USB) line

termination device with an EMI filter

and ESD protection diodes. This

device offers a cost effective and

compact solution for one USB

upstream port. The USB specification

requires line termination resistors on

both the D+ and D- lines. These

resistors ensure signal integrity by

matching the cable impedance to that

of the differential driver. The 1.5 kΩ

pull-up resistor identifies the

appropriate data line for full speed or

low speed operation.

The 47 pF capacitor completes the

high frequency filter and controls the

edge rate of the USB signals The

LX7203 protects both D+ and D- data

lines and the voltage bus from ESD.

The TVS protection diodes exceed the

requirements of IEC61000-4-2, level 4,

15kV (air discharge) and 8kV (contact

discharge).The integrated configuration

of the LX7203 minimizes board space

and allows for ideal placement near the

connector. The LX7203 is ideal for use

in USB hubs, peripherals and portable

appliances

IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com

PACKAGE ORDER INFO

SM

Plastic

6-Pin SC70

T

J

(°C)

RoHS Compliant / Pb-free

Transition DC: 0450

Package

Marking

Tape & Reel Quantity

(Reel Size)

-40 to 125 LX7203-15ISM 31

-40 to 125 LX7203-22ISM 32

3K (7inches)

Note: Append the letters “TR” to the part number for Tape & Reel Ordering.

KEY FEATURES

 Small SC70-6L Package

 Bi-directional EMI/RFI low-pass

filter

 Line termination with integrated

ESD protection

 Low TVS operating voltage

(5.25V)

 Low leakage current

 Integrated single die construction

 Crosses From Semtech STF203

APPLICATIONS

 USB 1.1 and USB 2.0 Full

Speed Compliant

 Peripherals

 Computers and Printers

 Mobile phones

 Pagers and PDA’s

 Digital Cameras

BENEFITS

 Filter response characterized up

to 6 GHz

 <2dB insertion loss in the pass

band

 >20dB attenuation in the 800-

900 MHz range

 >12dB attenuation in the WLAN

frequencies of 2.4GHz and 5.0-

6.0 GHz

PRODUCT HIGHLIGHT

Rs

D out

to IC

V

BUS

C

EDGE

1.5K

D in

from

connector

2

5

D in

from

connector

D out

to IC

C

EDGE

Circuit Diagram

16

5

43

2

V

BUS

D

IN

from

connector

D

OUT

to IC

GND

D

IN

from

connector

D

OUT

to IC

R

S

C

R

S

C

R

PU

?

Functional Schematic with PinOut

L

X

7

2

0

3

LX7203-xx

P

RODUCTION

D

ATA

S

HEET

Microsemi

Integrated Products Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 2

WWW.Microsemi .COM

EMI Filter & ESD Protection for Up Stream USB

Ports

Rev. 1.1d, 2005-05-18

TM

®

ABSOLUTE MAXIMUM RATINGS

Steady State Power ................................................................100mW

ESD Air Discharge per IEC61000-4-2.......................................16kV

ESD Contact Discharge per IEC61000-4-2 ...............................10kV

Peak Package Solder Reflow Temperature

(40 second maximum exposure) ................................. 260°C (+0, -5)

Operating Temperature ............................................-40°C to +125°C

Storage Temperature Range.....................................-65°C to +150°C

Note: Exceeding these ratings could cause damage to the device. All voltages are

with respect to Ground. Currents are positive into, negative out of specified

terminal

.

THERMAL DATA

SM

Plastic 6-Pin SC70

THERMAL RESISTANCE

-

JUNCTION TO

C

ASE

,

θ

JC

119 °C/W

THERMAL RESISTANCE

-

JUNCTION TO

A

MBIENT

,

θ

JA

122 °C/W

Junction Temperature Calculation: T

J

= T

A

+ (P

D

x θ

JA

).

The θ

JA

numbers are guidelines for the thermal performance of the device/pc-board

system. All of the above assume no ambient airflow.

PACKAGE PIN OUT

V

BUS

D

IN

D

IN

D

OUT

D

OUT

GND

1

2

3

4

5

6

from

connector

from

connector

to IC

SM

P

ACKAGE

(Top View)

RoHS / Pb-free 100% Matte Tin Lead Finish

FUNCTIONAL PIN DESCRIPTION

Name Description

VBUS Bus Voltage

DIN Data In

GND Ground

DOUT Data Out

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, the following specifications apply over the operating ambient temperature -40°C

≤

T

A

≤

+125°C except where

otherwise noted.

LX7203

Parameter Symbol Test Conditions

Min Typ Max

Units

Stand-Off Voltage VR

WM

5.25 V

Breakdown Voltage V

BR

IR = 1mA 6 V

Leakage Current I

R

VRWM = 5.25V, T = 25°C 1 µA

Series Resistance (-15) R

S

Each Line 13.5 15 16.5

Ω

Series Resistance (-22) R

S

Each Line 19.8 22 24.2

Ω

Temperature Coefficient of R

S

T

COEFF

Each Line 200 ppm

Pull Up Resistance R

PU

Each Line 1.35 1.5 1.65

K

Ω

Capacitor C

EDGE

Each Line 47 pF

Total Capacitance C

TOT

Between I/O Pins and Ground, Each Device

VR = 0V, f = 1MHz

54 60 66 pF

E

L

E

C

T

R

I

C

A

L

S

LX7203-xx

P

RODUCTION

D

ATA

S

HEET

Microsemi

Integrated Products Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 3

WWW.Microsemi .COM

EMI Filter & ESD Protection for Up Stream USB

Ports

Rev. 1.1d, 2005-05-18

TM

®

APPLICATION CIRCUITS

USB

Transceiver

Host or Hub (downstream port) Peripheral (upstream port)

USB

Transceiver

1

6

5

4

3

2

V

BUS

GND

C

R

S

R

PD

R

PD

R

S

C

16

5

43

2

V

BUS

GND

R

S

C

R

S

C

R

PU

LX7203

LX7201

Figure 1 – Typical Application

APPLICATION INFORMATION

The LX7203 meets the requirements of the USB v1.1 and

USB 2.0 Full Speed specification for device termination,

EMI filtering and ESD protection. The R

S

resistor provides

the proper signal termination; the C

EDGE

capacitor controls

the signal rise and fall slew; the TVS diodes protect the IC

from ESD damage; and the total capacitance and resistance

creates a low pass filter eliminating the high frequency

energy from the circuit. The LX7203 can configure the

upstream port for either Full-Speed or Low-Speed

operation. The figures below show the proper connection in

accordance with the USB specification.

F

ULL

S

PEED

D

EVICE

(F

IGURE

2)

The USB 2.0 specification offers a 12 Mbps data

transfer rate known as Full-Speed which requires a 1.5 kΩ

pull-up resistor to be connected to the D+ line. Slew rate

control is accomplished with C

EDGE

attached to the

transceiver before the R

S

.

 Voltage Supply (Vbus) is connected to Pin 5

 Ground is connected to Pin 2

 D+ from the connector is routed to Pin 1 (1.5 kΩ pull-up

resistor) and Pin 6 to the D+ line of the USB

Transceiver

 D- from the connector is routed to Pin 3 and Pin 4 to

the D- line of the USB Transceiver

cable

Host

USB

Transceiver

GND

D+

D-

V

BUS

Peripheral

USB

Transceiver

GND

D+

D-

V

BUS

R

PU

1

6

5

4

3

2

V

BUS

D

IN

from connector

D

OUT

to IC

GND

D

IN

from connector

D

OUT

to IC

LX7203

Figure 2 – Connection for Full Speed Operation

A

P

L

I

C

A

T

I

O

N

S

LX7203-15ISM

LX7203-15ISM

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