Description The STF03 is a combination EMI filter and line termination device with integrated diodes for use on upstream USB ports. It is constructed using a proprietary technology that allows passive components and diodes to be integrated in the same package. device will provide termination, filtering, and ESD protection for one upstream USB port. The STF03 is an easily implemented solution for meeting the requirements of revision. of the Universal Serial Bus specification. 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 4Ω characteristic impedance of the cable (90Ω balanced) to minimize transmission line reflections. They are available with resistor values of Ω (STF03), Ω (STF03), and 33Ω (STF0333). The.kΩ pullup resistor is required by the USB specification to identify the equipment as either a fullspeed (connected to D+ line) or lowspeed (connected to D line) device. The 47pF capacitors are required to bypass high frequency energy to ground and to control the edge rate of the USB signals. The diodes provide ESD protection of both (D+ and D) data lines and the voltage bus (V BUS ). The diodes on the input/output pins provide suppression of ESD voltages in excess of ±kv (air discharge) and ±8kV (contact discharge) per IEC 0004, level 4. The diode on the V BUS pin will suppress ESD discharges in excess of kv per IEC 0004. Circuit Diagram STF03 THRU STF0333 USB Upstream Port Filter and For EMI Filtering and ESD Protection Features Bidirectional EMI/RFI filtering and line termination with integrated ESD protection ESD protection for USB power (V BUS ) and data lines (D+ and D) to IEC 0004 (ESD) ±kv (air), ±8kV (contact) IEC 00044 (EFT) 40A (/0ns) Filtering and termination for one USB port resistors: Ω, Ω, and 33Ω Low operating voltage (.V) Low leakage current Small SC70L package Solidstate technology Mechanical Characteristics EIAJ SC70L package RoHS/WEEE Compliant Molding compound flammability rating: UL 94V0 Marking : Marking Code Packaging : Tape and Reel per EIA 48 Applications USB Ports Cellular Handsets PDAs Pagers Digital Cameras PC Peripherals MP3 Players Schematic and PIN Configuration. 4 3 SC70L (Top View) Revision 03//00
STF03 THRU STF0333 Absolute Maximum Rating Rating Symbol Value Units SteadyState Power P SS 00 mw ESD Air Discharge per IEC 0004 ESD Contact Discharge per IEC 0004 V ESD 0 kv Lead Soldering Temperature T L 0 (0 sec. ) C Operating Temperature T J 40 to + C Storage Temperature T STG to +0 C Electrical Characteristics STF03XX Parameter Symbol Conditions Minimum Typical Maximum Units Reverse StandOff Voltage V WM R. V Reverse Breakdown Voltage V R B I t = ma V Reverse Leakage Current I R V RWM =.V, T= C Between and data (D+, D) pin and Ground µ A Reverse Leakage Current I R µ A Resistance (STF03) R S 3.. Ohms Resistance (STF03) R S 0 4 Ohms Resistance (STF0333) R S 30 33 3 Ohms Pull Up Resistance R PU.3.. kohms Capacitor C 47 pf Total Capacitance C TOT Between Input or Output or Ground = 0V, f = MHz V R 0 pf 00 Semtech Corp.
STF03 THRU STF0333 Typical Characteristics ESD Clamping (8kV Contact) ESD Clamping (kv Air) Typical Insertion Loss Analog Crosstalk (D+ to D) 0 db 3 db db CH S LOG 3 db / REF 0 db : 0.394 db 800 MHz :.03 db.8 GHz 3: 4.78 db. GHz CH S log MAG 0 db/ REF 0 db PRm 9 db db db 3 8 db db 4 db MHz 0 MHz 00 MHz GHz 3 GHz START. 030 MHz STOP 3000. 000 000 MHz START.030 000 MHz STOP 3 000.000 000 MHz 00 Semtech Corp. 3
STF03 THRU STF0333 Applications Information Device Connection The STF03 is designed to provide termination, EMI filtering and ESD protection for one USB port. The device is connected as follows:. FullSpeed Devices: For fullspeed devices the pullup resistor is connected to the D+ line. Route the D+ line from the connector to pin of the STF03. Pin 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 is connected to the voltage supply line (V BUS ). Pin is connected to ground. Note that the input and output connections may be reversed if necessary (See Figure 3).. LowSpeed Devices: For low speed devices the pullup resistor is connected to the D line. Route the D line from the connector to pin of the STF03. Pin 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 is connected to the voltage supply line (V BUS ). Pin 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 kv. These discharges can occur on the data lines or the voltage bus. The STF03 is an easily implemented solution that is designed to meet the termination and EMI filter requirements of the USB specification revision.. It also provides ESD protection to IEC 0004, 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.kΩ pullup 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. diodes provide ESD protection of both (D+ and D) data lines and the voltage bus (V BUS ). The STF03 integrates all of these components in a small SC70 package. This integrated solution simplifies design and requires minimal board space. Figure Preferred Connection Diagram (Full Speed Devices) Figure Preferred Connection Diagram (Low Speed Devices) 00 Semtech Corp. 4 STF03 STF03 Figure 3 Alternate Connection Diagram (Full Speed Devices) STF03 STF03 Figure 4 Alternate Connection Diagram (Low Speed Devices)
STF03 THRU STF0333 Outline Drawing SC70 L X E/ ccc C X N/ TIPS aaa C SEATING PLANE C A N B D e D EI E e A A A bxn bbb C AB D GAGE PLANE 0. SIDE VIEW H DETAIL L (L) A SEE DETAIL A c 0 DIMENSIONS INCHES MILLIMETERS DIM MIN NOM MAX MIN NOM MAX A.043.0 A.000.004 0.00 0.0 A b.08.00.03.039.0 0.70 0. 0.90.00 0.30 c D.003.07.079.009.083 0.08.90.00 0..0 E.04.049.03...3 E e e.083 BSC.0 BSC.0.0 BSC 0. BSC.30 BSC L.00.04.08 0. 0.3 0.4 L N 0 0 (.07) 8 0 (0.4) 8 aaa bbb ccc.004.004.0 0.0 0.0 0.30 NOTES:. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).. DATUMS A AND B TO BE DETERMINED AT DATUM PLANE H 3. DIMENSIONS "E" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 4. REFERENCE JEDEC STD MO03, VARIATION AB. Land Pattern SC70 L C X Y G Z DIM C G P X Y Z DIMENSIONS INCHES MILLIMETERS (.073) (.8).039.00.0 0..0 0.40.033 0.8.0.70 P NOTES:. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 00 Semtech Corp.
STF03 THRU STF0333 Marking Ordering Information Part Number Resistor Marking Code Part Number Lead Finish Qty per Reel Reel Size STF03 Ω 3 STF03 Ω 3 STF0333 33 Ω 333 STF03.TC STF03.TC STF0333.TC SnPb SnPb SnPb 4 XXX 3 STF03.TCT STF03.TCT STF0333.TCT Note: Pb free finish is matte tin Pb free Pb free Pb free Note: XXX = Marking Code Contact Information Semtech Corporation Protection Products Division 00 Flynn Road, Camarillo, CA 930 Phone: (80)498 FAX (80)4983804 00 Semtech Corp.