SEMTECH STF203-15, STF203-33 Technical data

查询STF203-XX供应商

PROTECTION PRODUCTS

PROTECTION PRODUCTS

STF203-15 THRU STF203-33

USB Upstream Port Filter& TVS

For EMI Filtering and ESD Protection

Description

The STF203 is a combination EMI filter and line
termination device with integrated TVS diodes for use
on upstream USB ports. It is constructed using a
proprietary technology that allows passive components
and TVS diodes to be integrated in the same package.
Each device will provide termination, filtering, and ESD
protection for one upstream USB port. The STF203 is
an easily implemented solution for meeting the
requirements of revision 1.1 of the Universal Serial Bus
specification.
Line termination is achieved with series resistors on
both the D+ and D- USB lines. The value of series
resistance added to the output impedance of the USB
driver must be as close to possible to the 45

characteristic impedance of the cable (90Ω balanced)

to minimize transmission line reflections. They are
available with resistor values of 15

Ω (STF203-22), and 33Ω (STF203-33). The 1.5kΩ

22
pull-up resistor is required by the USB specification to
identify the equipment as either a full-speed
(connected to D+ line) or low-speed (connected to D­line) device. The 47pF capacitors are required to
bypass high frequency energy to ground and to control
the edge rate of the USB signals. The TVS diodes
provide ESD protection of both (D+ & D-) data lines
and the voltage bus (V
input/output pins provide suppression of ESD voltages
in excess of 15kV (air discharge) and 8kV (contact
discharge) per IEC 61000-4-2, level 4. The TVS diode
on the V
of 25kV per IEC 61000-4-2.

pin will suppress ESD discharges in excess

BUS

). The TVS diodes on the

BUS

Ω (STF203-15),

Ω

Features

 Bidirectional EMI/RFI filtering and line termination

with integrated ESD protection

 ESD protection for USB power (V

(D+ & D-) to IEC 61000-4-2 Level 4

) and data lines

BUS

 Filtering and termination for one USB port

 Series resistors: 15Ω, 22Ω, and 33Ω

 Low TVS operating voltage (5.25V)
 Low leakage current
 Small SC70-6L package
 Solid-state technology

Mechanical Characteristics

 EIAJ SC70-6L package
 Molding compound flammability rating: UL 94V-0
 Marking : Marking Code
 Packaging : Tape and Reel per EIA 481

Applications

 USB Ports
 Cellular Handsets
 PDA
 Pagers
 Digital Cameras
 PC Peripherals
 MP3 Players

Circuit Diagram

6

2

4

Revision 05/30/2002

Schematic & PIN Configuration

1

.

5

3

1

D In/Out

D In/Out

D In/Out

D In/Out

SC70-6L (Top View)

www.semtech.com

PROTECTION PRODUCTS

Absolute Maximum Rating

STF203-15 THRU STF203-33

gnitaRlobmySeulaVstinU

rewoPetatS-ydaetSP

erutarepmeTgniredloSdaeLT

erutarepmeTgnitarepOT

erutarepmeTegarotST

Electrical Characteristics

XX-302FTSXX-302FTS

XX-302FTSXX-302FTS

XX-302FTS

retemaraPretemaraP

retemaraPretemaraPlobmySlobmyS

retemaraP

egatloVffO-dnatSesreveRSVTV

egatloVnwodkaerBesreveRSVTV

tnerruCegakaeLesreveRSVTI

kp

2-4-00016CEIrepegrahcsiDriADSEV

2-4-00016CEIrepegrahcsiDtcatnoCDSEV

lobmySlobmySsnoitidnoCsnoitidnoC

lobmyS

MWR

RB

R

V

I

t

MWR

snoitidnoCsnoitidnoCmuminiMmuminiM

snoitidnoC

Am1=6 V

VneewteB

SUB

PP

PP

L

J

GTS

muminiMmuminiMlacipyTlacipyT

muminiM

C°52=T,V52.5=

dnanip

001Wm

61Vk

01Vk

).ces01(062C°

521+ot04-C°

051+ot55-C°

lacipyTlacipyTmumixaMmumixaM

lacipyT

mumixaMmumixaMstinUstinU

mumixaM

52.5V

5Aµ

stinUstinU

stinU

dnuorG

tnerruCegakaeLesreveRSVTI

R

V

MWR

C°52=T,V3.3=

1Aµ

atadynaneewteB

dnanip)-D,+D(

.dnuorG

)51-302FTS(ecnatsiseRseireSR

)22-302FTS(ecnatsiseRseireSR

)33-302FTS(ecnatsiseRseireSR

ecnatsiseRpUlluPR

S

S

S

PU

eniLhcaE5.31515.61

eniLhcaE022242

eniLhcaE033363

53.15.156.1kΩ

roticapaCCeniLhcaE74Fp

ecnaticapaClatoTC

TOT

rotupnIneewteB

06Fp

dnuorGottuptuO

V

R

zHM1=f,V0=

Ω
Ω
Ω

2 2002 Semtech Corp.

www.semtech.com

PROTECTION PRODUCTS

Typical Characteristics

STF203-15 THRU STF203-33

ESD Clamping (8kV Contact)

Typical Insertion Loss

CH1 S21log MAG 3 dB/ REF 0 dB

ESD Clamping (15kV Air)

Analog Crosstalk (D+ to D-)

CH1 S21log MAG 20 dB/ REF 0 dB

PRm

START .030 000 MHz STOP 3 000.000 000 MHz

PRm

START .030 000 MHz STOP 3 000.000 000 MHz

3 2002 Semtech Corp.

www.semtech.com

PROTECTION PRODUCTS

Applications Information

Device Connection

The STF203 is designed to provide termination, EMI
filtering and ESD protection for one USB port. The
device is connected as follows:

1.1.

1. Full-Speed Devices: For full-speed devices the

1.1.
pull-up resistor is connected to the D+ line. Route
the D+ line from the connector to pin 1 of the
STF203. Pin 6 is connected to the D+ line of the
IC. Route the D- line from the connector to pin 3.
Pin 4 is connected to the D- line of the IC. Pin 5 is
connected to the voltage supply line (V
connected to ground. Note that the input and
output connections may be reversed if necessary
(See Figure 3).

2.2.

2. Low-Speed Devices

2.2.

::

: For low speed devices the

::
pull-up resistor is connected to the D- line. Route
the D- line from the connector to pin 1 of the
STF203. Pin 6 is connected to the D- line of the IC.
Route the D+ line from the connector to pin 3. Pin
4 is connected to the D+ line of the IC. Pin 5 is
connected to the voltage supply line (V
connected to ground. Note that the input and
output connections may be reversed if necessary
(See Figure 4).

USB Port Design Considerations

The Universal Serial Bus (USB) specification requires
termination and filtering components for proper opera­tion. In addition, an open USB socket is vulnerable to
hazardous ESD discharges in excess of 15kV. These
discharges can occur on the data lines or the voltage
bus. The STF203 is an easily implemented solution
that is designed to meet the termination & EMI filter
requirements of the USB specification revision 1.1. It
also provides ESD protection to IEC 61000-4-2,
level 4.
USB line termination is achieved with series resistors
on both the D+ and D- lines. These resistors preserve
signal integrity by matching the cable impedance to

that of the differential driver. A 1.5kΩ pull-up resistor

is used to identify an upstream port on either the D+
(full speed devices) or the D- (low speed devices) data
line. Capacitors are used for EMI suppression. TVS
diodes provide ESD protection of both (D+ & D-) data
lines and the voltage bus (V

). The STF203 integrates

BUS

all of these components in a small SC-70 package.
This integrated solution simplifies design and requires
minimal board space.

). Pin 2 is

BUS

). Pin 2 is

BUS

STF203-15 THRU STF203-33

Figure 1 - Preferred Connection Diagram

(Full Speed Devices)

From Connector

4 2002 Semtech Corp.

1

STF203

2

34

Figure 2 - Preferred Connection Diagram

(Low Speed Devices)

From Connector

1

STF203

2

34

Figure 3 - Alternate Connection Diagram

(Full Speed Devices)

1

2

34

Figure 4 - Alternate Connection Diagram

(Low Speed Devices)

1

2

34

STF203

STF203

6

5

6

5

From Connector

6

5

From Connector

6

5

www.semtech.com

PROTECTION PRODUCTS

Outline Drawing

STF203-15 THRU STF203-33

Land Pattern

5 2002 Semtech Corp.

www.semtech.com

PROTECTION PRODUCTS

Marking

STF203-15 THRU STF203-33

rebmuNtraP

51-302FTS51 Ω 513
22-302FTS22 Ω 223
33-302FTS33 Ω 333

seireS

XXX

123

Note: XXX = Marking Code

Ordering Information

gnikraM

rotsiseR

456

edoC

rebmuNtraP

CT.51-302FTS51 Ω 000,3hcnI7
CT.22-302FTS22 Ω 000,3hcnI7
CT.33-302FTS33 Ω 000,3hcnI7

Contact Information

seireS

retsiseR

leeRrepytQeziSleeR

Semtech Corporation

Protection Products Division

200 Flynn Road, Camarillo, CA 93012

Phone: [phone] FAX [phone]

6 2002 Semtech Corp.

www.semtech.com