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| USB Upstream Port Filter and TVS For EMI Filtering and ESD Protection 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 balanced) to minimize transmission line reflections. They are available with resistor values of 15 (STF203-15), 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 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 (VBUS). The TVS diodes on the 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 VBUS pin will suppress ESD discharges in excess of 25kV per IEC 61000-4-2. STF203-15 THRU STF203-33 Features Bidirectional EMI/RFI filtering and line termination with integrated ESD protection ESD protection for USB power (VBUS) and data lines (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, 22, and 33 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 . Schematic and PIN Configuration 1 D In/Out D In/Out 2 5 4 3 D In/Out D In/Out SC70-6L (Top View) Revision 03/22/2006 1 www.semtech.com STF203-15 THRU STF203-33 PROTECTION PRODUCTS Absolute Maximum Rating R ating Steady-State Power ESD Air Discharge per IEC 61000-4-2 ESD Contact Discharge per IEC 61000-4-2 Lead Soldering Temperature Operating Temperature Storage Temperature Symbol PSS VESD TL TJ TSTG Value 100 16 10 260 (10 sec.) -40 to +125 -55 to +150 Units mW kV C C C Electrical Characteristics STF203-XX Parameter T VS Reverse Stand-Off Voltage T VS Reverse Breakdown Voltage T VS Reverse Leakage Current Symbol VRWM V BR IR It = 1mA VRWM= 5.25V, T=25 C Between and data (D+, D-) p in and Ground Each Line Each Line Each Line Each Line 13.5 20 30 1.35 Each Line Between Inp ut or Outp ut or Ground VR = 0V, f = 1MHz 15 22 33 1.5 47 60 6 5 Conditions Minimum Typical Maximum 5.25 Units V V A T VS Reverse Leakage Current Series Resistance (STF203-15) Series Resistance (STF203-22) Series Resistance (STF203-33) Pull Up Resistance Cap acitor Total Cap acitance IR RS RS RS R PU C CTOT 1 16.5 24 36 1.65 A Ohms Ohms Ohms kOhms pF pF 2006 Semtech Corp. 2 www.semtech.com STF203-15 THRU STF203-33 PROTECTION PRODUCTS Typical Characteristics ESD Clamping (8kV Contact) ESD Clamping (15kV Air) Typical Insertion Loss CH1 S21 LOG 3 dB / REF 0 dB 1: -20.394 dB 800 MHz 0 dB -3 dB -6 dB -9 dB -12 dB 3 Analog Crosstalk (D+ to D-) CH1 S 21 log MAG 20 dB/ REF 0 dB PRm 2: -15.035 dB 1.8 GHz 3: -14.781 dB 2.5 GHz -15 dB 2 -18 dB -21 dB -24 dB 1 MHz START. 030 MHz 10 MHz 100 MHz 1 1 3 GHz GHz STOP 3000. 000000 MHz START .030 000 MHz STOP 3 000.000 000 MHz 2006 Semtech Corp. 3 www.semtech.com STF203-15 THRU STF203-33 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 . Full-Speed Devices: For full-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 (VBUS). Pin 2 is connected to ground. Note that the input and output connections may be reversed if necessary (See Figure 3). 2 . Low-Speed Devices: 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 (VBUS). Pin 2 is 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 1.5k 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 (VBUS). The STF203 integrates all of these components in a small SC-70 package. This integrated solution simplifies design and requires minimal board space. 2006 Semtech Corp. 4 1 2 3 Figure 1 - Preferred Connection Diagram (Full Speed Devices) From Connector 1 2 3 STF203 6 5 4 Figure 2 - Preferred Connection Diagram (Low Speed Devices) From Connector 1 2 3 STF203 6 5 4 Figure 3 - Alternate Connection Diagram (Full Speed Devices) From Connector STF203 6 5 4 Figure 4 - Alternate Connection Diagram (Low Speed Devices) From Connector 1 2 3 STF203 6 5 4 www.semtech.com STF203-15 THRU STF203-33 PROTECTION PRODUCTS Outline Drawing - SC70 6L A e1 N 2X E/2 EI E SIDE VIEW SEE DETAIL D DIM DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX .043 .000 .004 .028 .035 .039 .006 .012 .003 .009 .075 .079 .083 .045 .049 .053 .083 BSC .026 BSC .051 .010 .014 .018 (.017) 6 0 8 .004 .004 .012 1.10 0.10 0.00 0.70 0.90 1.00 0.15 0.30 0.22 0.08 1.90 2.00 2.10 1.15 1.25 1.35 2.10 BSC 0.65 BSC 1.30 BSC 0.26 0.36 0.46 (0.42) 6 0 8 0.10 0.10 0.30 A ccc C 2X N/2 TIPS 1 B 2 e GAGE PLANE D 0.15 A2 A A1 bxN bbb C A-B D L (L1) DETAIL H c aaa C SEATING PLANE 01 A A1 A2 b c D E1 E e e1 L L1 N 01 aaa bbb ccc A C NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DATUMS -A- AND -B- TO BE DETERMINED AT DATUM PLANE -H3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 4. REFERENCE JEDEC STD MO-203, VARIATION AB. Land Pattern - SC70 6L X DIM C Y G Z C G P X Y Z DIMENSIONS INCHES MILLIMETERS (.073) .039 .026 .016 .033 .106 (1.85) 1.00 0.65 0.40 0.85 2.70 P 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. 5 www.semtech.com STF203-15 THRU STF203-33 PROTECTION PRODUCTS Marking Part Number STF203-15 STF203-22 STF203-33 Series R esistor 15 22 33 Marking Code 315 322 333 Ordering Information Part Number STF203-15.TC STF203-22.TC STF203-33.TC STF203-15.TCT STF203-22.TCT Lead Finish SnPb SnPb SnPb Pb free Pb free Pb free Qty per Reel 3,000 3,000 3,000 3,000 3,000 3,000 R eel Size 7" 7" 7" 7" 7" 7" 6 5 4 XXX 1 2 3 Note: XXX = Marking Code STF203-33.TCT Note: Pb free finish is matte tin Contact Information Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 www.semtech.com 2006 Semtech Corp. 6 |
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