stf203

Manufacturer Part Numberstf203
DescriptionStf203 Usb Upstream Port Filter & Tvs For Emi Filtering And Esd Protection
ManufacturerSemtech Corporation
stf203 datasheet
 


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PROTECTION PRODUCTS
PROTECTION PRODUCTS
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 (90
to minimize transmission line reflections. They are
available with resistor values of 15
22
(STF203-22), and 33
(STF203-33). The 1.5k
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 D-
line) 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
). The TVS diodes on the
BUS
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
pin will suppress ESD discharges in excess
BUS
of 25kV per IEC 61000-4-2.
Circuit Diagram
6
2
4
Revision 03/22/2006
STF203-15 THRU STF203-33
USB Upstream Port Filter and TVS
For EMI Filtering and ESD Protection
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)
Filtering and termination for one USB port
Series resistors: 15
Low TVS operating voltage (5.25V)
Low leakage current
Small SC70-6L package
Solid-state technology
Mechanical Characteristics
balanced)
EIAJ SC70-6L package
RoHS/WEEE Compliant
(STF203-15),
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
Schematic and PIN Configuration
1
D In/Out
.
5
3
D In/Out
1
) and data lines
BUS
22
and 33
D In/Out
D In/Out
SC70-6L (Top View)
www.semtech.com

stf203 Summary of contents

  • Page 1

    ... PROTECTION PRODUCTS PROTECTION PRODUCTS Description The STF203 is a combination EMI filter and line termination device with integrated TVS diodes for use on upstream USB ports constructed using a proprietary technology that allows passive components and TVS diodes to be integrated in the same package. ...

  • Page 2

    ... 2006 Semtech Corp. STF203-15 THRU STF203- ...

  • Page 3

    ... REF -12 dB -15 dB -18 dB - 100 MHz MHz MHz START . 030 MHz 2006 Semtech Corp. STF203-15 THRU STF203-33 CH1 -20.394 dB 800 MHz PRm 2: -15.035 dB 1.8 GHz 3: -14.781 dB 2.5 GHz GHz GHz START STOP 000 ...

  • Page 4

    ... 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 ...

  • Page 5

    ... REFERENCE JEDEC STD MO-203, VARIATION AB. 4. Land Pattern - SC70 NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 2006 Semtech Corp. STF203-15 THRU STF203-33 SEE DETAIL SIDE VIEW H c GAGE PLANE 0. (L1) A ...

  • Page 6

    ... XXX Note: XXX = Marking Code Contact Information 2006 Semtech Corp. STF203-15 THRU STF203-33 Ordering Information ...