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TF202

更新时间： 2024-10-13 22:42:19
品牌 Logo 应用领域
商升特 - SEMTECH 电视
页数 文件大小 规格书
6页 167K
描述
USB Upstream Port Filter & TVS For EMI Filtering and ESD Protection

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STF202-22  
&
USB Upstream Port Filter & TVS  
STF202-30  
For EMI Filtering and ESD Protection  
Objective - March 03, 2000  
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.Semtech.com  
DESCRIPTION  
FEATURES  
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.  
•
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  
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 (VBUS). The TVS  
diodes provide effective suppression of ESD voltages  
in excess of 15kV (air discharge) and 8kV (contact  
discharge) per IEC 1000-4-2, level 4.  
•
•
•
•
EIAJ SOT-23 6L package  
Molding compound flammability rating: UL 94V-0  
Marking : Marking Code  
Packaging : Tape and Reel per EIA 481  
APPLICATIONS  
•
•
•
•
•
USB Hubs  
Portable electronics  
Cellular Handsets  
Peripherals  
Servers, Desktop, Notebook, and Handheld  
Computers  
ORDERING INFORMATION  
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.  
Part Number  
Series  
Resistor  
Qty per  
Reel  
Reel Size  
STF202-22.TC  
STF202-30.TC  
22Ω  
30Ω  
3,000  
3,000  
7”  
7”  
COMPONENT VALUES  
SCHEMATIC & PIN CONFIGURATION  
Series  
Resistor  
(RS)  
Pull Up  
Resistor  
(RPU)  
Termination  
Capacitor  
(C)  
STF202-22  
STF202-30  
Tolerance  
22Ω  
30Ω  
1.5kΩ  
1.5kΩ  
±10%  
47  
47  
±10%  
±20%  
SOT-23 6L (Top View)  
© 2000 SEMTECH CORP.  
652 MITCHELL ROAD NEWBURY PARK CA 91320  
123456

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