STF202-22TC SEMTECH [Semtech Corporation], STF202-22TC Datasheet

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STF202-22TC

Manufacturer Part Number
STF202-22TC
Description
USB Upstream Port Filter & TVS For EMI Filtering and ESD Protection
Manufacturer
SEMTECH [Semtech Corporation]
Datasheet
Objective - March 03, 2000
DESCRIPTION
The STF202 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
STF202 is an easily implemented solution for meeting
the requirements of revision 1.1 of the Universal Serial
Bus specification.
USB line termination is achieved with series 22 or
30 resistors on both the D+ and D- USB lines. These
resistors preserve signal integrity by matching the
cable impedance to that of the differential driver. The
1.5k
on each line. This 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 used to
bypass high frequency energy to ground and for edge
rate control of the USB signals. Finally, the STF202
contains TVS diodes for ESD protection of both (D+ &
D-) data lines and the voltage bus (V
diodes provide effective suppression of ESD voltages
in excess of 15kV (air discharge) and 8kV (contact
discharge) per IEC 1000-4-2, level 4.
The small size and integrated feature of the STF202
minimizes required board space and increases system
reliability. The STF202 is suitable for use in USB hubs,
computers, peripherals, and portable devices.
COMPONENT VALUES
© 2000 SEMTECH CORP.
STF202-22
STF202-30
Tolerance
pull-up resistor completes the termination circuit
Resistor
Series
±10%
(R
22
30
S
)
Resistor
Pull Up
1.5k
1.5k
±10%
(R
PU
BUS
)
). The TVS
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.Semtech.com
USB Upstream Port Filter & TVS
For EMI Filtering and ESD Protection
Termination
Capacitor
±20%
(C)
47
47
ORDERING INFORMATION
SCHEMATIC & PIN CONFIGURATION
STF202-22.TC
STF202-30.TC
FEATURES
MECHANICAL CHARACTERISTICS
APPLICATIONS
Part Number
652 MITCHELL ROAD NEWBURY PARK CA 91320
Bidirectional EMI/RFI filtering and line termination
with integrated ESD protection
ESD protection for USB power (V
lines (D+ & D-) to IEC 1000-4-2 Level 4
Filtering and termination for two USB data lines
Different series resistors for impedance matching
Low TVS operating voltage (5.25V)
Low leakage current
Small SOT-23 6L package
Solid-state technology
EIAJ SOT-23 6L package
Molding compound flammability rating: UL 94V-0
Marking : Marking Code
Packaging : Tape and Reel per EIA 481
USB Hubs
Portable electronics
Cellular Handsets
Peripherals
Servers, Desktop, Notebook, and Handheld
Computers
SOT-23 6L (Top View)
Resistor
Series
22
30
Qty per
3,000
3,000
Reel
STF202-22
STF202-30
BUS
) and data
&
Reel Size
7”
7”

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STF202-22TC Summary of contents

Page 1

... IEC 1000-4-2, level 4. The small size and integrated feature of the STF202 minimizes required board space and increases system reliability. The STF202 is suitable for use in USB hubs, computers, peripherals, and portable devices. COMPONENT VALUES Series ...

Page 2

... STF202-xx Parameter TVS Reverse Stand-Off Voltage TVS Reverse Breakdown Voltage TVS Reverse Leakage Current TVS Reverse Leakage Current Total TVS Junction Capacitance Series Resistor (STF202-22) Series Resistor (STF202-30) Pull Up Resistor Capacitor Total Capacitance MARKING CODES Part Number Marking Code STF202-22 222 ...

Page 3

... SEMTECH CORP. USB Upstream Port Filter & TVS For EMI Filtering and ESD Protection ESD Clamping (15kV Air) Analog Crosstalk ( -20 dB -60 dB 2.0GHz 0.030 MHz 652 MITCHELL ROAD NEWBURY PARK CA 91320 STF202-22 & STF202-30 1 GHz ...

Page 4

... In addition, an open USB socket is vulnerable to hazardous ESD discharges in excess of 15kV. These discharges can may occur on the data lines or the voltage bus. The STF202 is an easily implemented solution 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 ...

Page 5

... Objective - March 03, 2000 APPLICATIONS INFORMATION © 2000 SEMTECH CORP. USB Upstream Port Filter & TVS For EMI Filtering and ESD Protection Figure 3 - USB Port Components Figure 4 - Typical USB Hub Design 652 MITCHELL ROAD NEWBURY PARK CA 91320 STF202-22 & STF202-30 ...

Page 6

... Objective - March 03, 2000 OUTLINE DRAWING SOT23-6L LAND PATTERN SOT23-6L © 2000 SEMTECH CORP. USB Upstream Port Filter & TVS For EMI Filtering and ESD Protection 652 MITCHELL ROAD NEWBURY PARK CA 91320 STF202-22 & STF202-30 ...

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