STF203-15 THRU STF203-33 USB Upstream Port Filter& TVS For EMI Filtering and ESD Protection PROTECTION PRODUCTS Description Features 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 45Ω characteristic impedance of the cable (90Ω balanced) to minimize transmission line reflections. They are available with resistor values of 15Ω (STF203-15), 22Ω (STF203-22), and 33Ω (STF203-33). The 1.5kΩ 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+ & 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. K Bidirectional EMI/RFI filtering and line termination K K K K K K K with integrated ESD protection ESD protection for USB power (VBUS) and data lines (D+ & D-) to IEC 61000-4-2 Level 4 Filtering and termination for one USB port Series resistors: 15Ω, 22Ω, and 33Ω Low TVS operating voltage (5.25V) Low leakage current Small SC70-6L package Solid-state technology Mechanical Characteristics K K K K EIAJ SC70-6L package Molding compound flammability rating: UL 94V-0 Marking : Marking Code Packaging : Tape and Reel per EIA 481 Applications K K K K K K K Circuit Diagram USB Ports Cellular Handsets PDA Pagers Digital Cameras PC Peripherals MP3 Players Schematic & PIN Configuration 6 1 D In/Out D In/Out D In/Out D In/Out . 2 5 4 3 SC70-6L (Top View) Revision 05/30/2002 1 www.semtech.com STF203-15 THRU STF203-33 PROTECTION PRODUCTS Absolute Maximum Rating Rating Symbo l Value Units Steady-State Power Ppk 100 mW ESD Air Discharge per IEC 61000-4-2 VPP 16 kV ESD Contact Discharge per IEC 61000-4-2 VPP 10 kV Lead Soldering Temperature TL 260 (10 sec.) °C Operating Temperature TJ -40 to +125 °C TSTG -55 to +150 °C Storage Temperature Electrical Characteristics STF203-XX Parameter Symb ol Cond itions Mi n i mu m Typ ical Maximum U n i ts 5.25 V T VS Reverse Stand-Off Voltage VRWM T VS Reverse Breakdown Voltage V BR It = 1mA T VS Reverse Leakage Current IR VRWM = 5.25V, T=25°C Between VBUS pin and Ground 5 µA T VS Reverse Leakage Current IR VRWM = 3.3V, T=25°C Between any data (D+, D-) pin and Ground. 1 µA Series Resistance (STF203-15) RS Each Line 13.5 15 16.5 Ω Series Resistance (STF203-22) RS Each Line 20 22 24 Ω Series Resistance (STF203-33) RS Each Line 30 33 36 Ω Pull Up Resistance RUP 1.35 1.5 1.65 kΩ Capacitor Total Capacitance 2002 Semtech Corp. 6 V C Each Line 47 pF CTOT Between Input or Output to Ground VR = 0V, f = 1MHz 60 pF 2 www.semtech.com STF203-15 THRU STF203-33 PROTECTION PRODUCTS Typical Characteristics CH1 S 21 ESD Clamping (8kV Contact) ESD Clamping (15kV Air) Typical Insertion Loss Analog Crosstalk (D+ to D-) log MAG 3 dB/ CH1 REF 0 dB log MAG 20 dB/ REF 0 dB PRm PRm START S 21 .030 000 MHz 2002 Semtech Corp. START STOP 3 000.000 000 MHz 3 .030 000 MHz STOP 3 000.000 000 MHz www.semtech.com STF203-15 THRU STF203-33 PROTECTION PRODUCTS Applications Information Figure 1 - Preferred Connection Diagram (Full Speed Devices) Device Connection The STF203 is designed to provide termination, EMI filtering and ESD protection for one USB port. The device is connected as follows: From Connector 1 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). STF203 6 2 5 3 4 Figure 2 - Preferred Connection Diagram (Low Speed Devices) From Connector 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). 1 STF203 6 2 5 3 4 Figure 3 - Alternate Connection Diagram (Full Speed Devices) USB Port Design Considerations From Connector 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 & 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 1.5kΩ 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+ & 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. 2002 Semtech Corp. 1 STF203 6 2 5 3 4 Figure 4 - Alternate Connection Diagram (Low Speed Devices) From Connector 1 4 STF203 6 2 5 3 4 www.semtech.com STF203-15 THRU STF203-33 PROTECTION PRODUCTS Outline Drawing Land Pattern 2002 Semtech Corp. 5 www.semtech.com STF203-15 THRU STF203-33 PROTECTION PRODUCTS Marking Par t Numbe r Se r ie s Re sisto r Mar king Co d e STF203-15 15 Ω 315 STF203-22 22 Ω 322 STF203-33 33 Ω 333 6 5 4 XXX 1 2 3 Note: XXX = Marking Code Ordering Information Par t Numbe r Se r ie s Re siste r Qty pe r Re e l Re e l Size STF203-15.TC 15 Ω 3,000 7 Inch STF203-22.TC 22 Ω 3,000 7 Inch STF203-33.TC 33 Ω 3,000 7 Inch Contact Information Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 2002 Semtech Corp. 6 www.semtech.com