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PDF STF202-22 Data sheet ( Hoja de datos )
| Número de pieza | STF202-22 | |
| Descripción | (STF202-22/-30) USB Upstream Port Filter & TVS | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de STF202-22 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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USB Upstream Port Filter & TVS
For EMI Filtering and ESD Protection
STF202-22
&
STF202-30
Objective - March 03, 2000
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.Semtech.com
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.
FEATURES
• Bidirectional EMI/RFI filtering and line termination
with integrated ESD protection
• ESD protection for USB power (VBUS) and data
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
USB line termination is achieved with series 22Ω or
MECHANICAL CHARACTERISTICS
30Ω 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
1.5kΩ pull-up resistor completes the termination circuit
on each line. This resistor is required by the USB
• EIAJ SOT-23 6L package
• Molding compound flammability rating: UL 94V-0
• Marking : Marking Code
• Packaging : Tape and Reel per EIA 481
specification to identify the equipment as either a full-
speed (connected to D+ line) or low-speed (connected
APPLICATIONS
to D- line) device. The 47pF capacitors are used to
• USB Hubs
bypass high frequency energy to ground and for edge
• Portable electronics
rate control of the USB signals. Finally, the STF202
• Cellular Handsets
contains TVS diodes for ESD protection of both (D+ &www.DataSheet4U.com • Peripherals
D-) data lines and the voltage bus (VBUS). The TVS
• Servers, Desktop, Notebook, and Handheld
diodes provide effective suppression of ESD voltages
Computers
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
ORDERING INFORMATION
minimizes required board space and increases system
Part Number Series
Qty per Reel Size
reliability. The STF202 is suitable for use in USB hubs,
Resistor
Reel
computers, peripherals, and portable devices.
STF202-22.TC 22Ω
3,000
7”
STF202-30.TC 30Ω
3,000
7”
COMPONENT VALUES
STF202-22
Series
Resistor
(RS)
22Ω
Pull Up
Resistor
(RPU)
1.5kΩ
STF202-30
30Ω
1.5kΩ
Tolerance
±10%
±10%
Termination
Capacitor
(C)
47
47
±20%
SCHEMATIC & PIN CONFIGURATION
SOT-23 6L (Top View)
© 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
1 page  
USB Upstream Port Filter & TVS
For EMI Filtering and ESD Protection
Objective - March 03, 2000
APPLICATIONS INFORMATION
STF202-22
&
STF202-30
Figure 3 - USB Port Components
Figure 4 - Typical USB Hub Design
© 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet STF202-22.PDF ] | |
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