Semtech STF203-15, STF203-22, STF203-33 Schematic [ru]

PROTECTION PRODUCTS

PROTECTION PRODUCTS

STF203-15 THRU STF203-33

USB Upstream Port Filter and 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+ and 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+ and D-) to

IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)

) 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
 RoHS/WEEE Compliant
 Molding compound flammability rating: UL 94V-0
 Marking : Marking Code
 Packaging : Tape and Reel per EIA 481

Applications

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

Circuit Diagram

6

2

4

Revision 03/22/2006

Schematic and PIN Configuration

1

.

5

3

1

D In/Out

D In/Out

D In/Out

D In/Out

SC70-6L (Top View)

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PROTECTION PRODUCTS

Absolute Maximum Rating

STF203-15 THRU STF203-33

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Electrical Characteristics

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2 2006 Semtech Corp.

www.semtech.com

PROTECTION PRODUCTS

Typical Characteristics

STF203-15 THRU STF203-33

0 dB

-3 dB

-6 dB

-9 dB

ESD Clamping (8kV Contact)

Typical Insertion Loss

CH1 S21 LOG 3 dB / REF 0 dB

1: -20.394 dB

800 MHz

2: -15.035 dB

1.8 GHz

3: -14.781 dB

2.5 GHz

ESD Clamping (15kV Air)

Analog Crosstalk (D+ to D-)

CH1 S21log MAG 20 dB/ REF 0 dB

PRm

-12 dB

-15 dB

-18 dB

-21 dB

-24 dB

START . 030 MHz

1

MHz

10

MHz

1

100

MHz

1

GHz

3

STOP 000 . 000 000 MHz

2

GHz

3

3

START .030 000 MHz STOP 3 000.000 000 MHz

3 2006 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 and 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+ and D-)
data lines and the voltage bus (V

). The STF203

BUS

integrates 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 2006 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 - SC70 6L

STF203-15 THRU STF203-33

A

e1

D

N

2X

E/2

E

EI

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2X N/2 TIPS

12

e

B

D

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SEATING
PLANE

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A2

A

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NOTES:

CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).

1.

DATUMS AND TO BE DETERMINED AT DATUM PLANE

2. -A-

DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS

3.
OR GATE BURRS.

REFERENCE JEDEC STD MO-203, VARIATION AB.

4.

-B-

SIDE VIEW

GAGE

PLANE

0.15

-H-

DIMENSIONS

INCHES

DIM

MIN NOM MAX MIN MAX

---

A

.000

SEE DETAIL

A

H

c

L

01

DETAIL

(L1)

A

A1
A2

E1

e1

L1

01
aaa
bbb
ccc

.028

.035

-

.006

b
c

D

E

e

L

N

.003

.045

.010

0°

­.079
.049

.083 BSC
.026 BSC

.014

(.017)

6

­.004
.004
.012

MILLIMETERS

.043
.004 0.00
.039

0.70
.012 0.15
.009

0.08
.083

1.90.075
.053 1.15

0.26

8° 0°

NOM

-

2.10 BSC

0.65 BSC

1.30 BSC.051

(0.42)

0.90

2.00

1.25

0.36.018

6

0.10

0.10

0.30

-

1.10

-

0.10

1.00

-

0.30

-

0.22

2.10

1.35

0.46

-

8°

Land Pattern - SC70 6L

C

NOTES:

THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.

1.
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.

X

DIM

DIM

C

C
G

Z

G

Y

P

G
P

P
X

X
Y

Y
Z

Z

DIMENSIONS

DIMENSIONS

INCHES

INCHES

(.073)

.039
.026
.016
.033
.106

MILLIMETERS

MILLIMETERS

(1.85)

1.00

0.65

0.40

0.85

2.70

5 2006 Semtech Corp.

www.semtech.com

STF203-15 THRU STF203-33

PROTECTION PRODUCTS

Marking Ordering Information

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

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XXX

123

Note: XXX = Marking Code

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Note: Pb free finish is matte tin

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CT.22-302FTSbPnS000,3”7

CT.33-302FTSbPnS000,3”7

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TCT.22-302FTSeerfbP000,3”7

TCT.33-302FTSeerfbP000,3”7

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Contact Information

Semtech Corporation

Protection Products Division

200 Flynn Road, Camarillo, CA 93012

Phone: [phone] FAX [phone]

6 2006 Semtech Corp.

www.semtech.com