SR12

05255 SR12 STEERING DIODE/ TVS ARRAY COMBO APPLICATIONS ✔ Ethernet - 10/100 Base T ✔ FireWire ✔ Wireless Communications ✔ USB Interface IEC COMPATIBILITY ( EN61000-4) ✔ 61000-4-2 (ESD): Air - 15kV, Contact - 8kV ✔ 61000-4-4 (EFT): 40A - 5/50ns ✔ 61000-4-5 (Surge): 24A, 8/20µs - Level 2(Line-Gnd) & Level 3(Line-Line) SOT-143 FEATURES ✔ ESD Protection > 25 kilovolts ✔ 500 Watts Peak Power per Line (tp = 8/20µs) ✔ Low Clamping Voltage ✔ Unidirectional Configuration ✔ Protects 2 I/O Ports and Power Supply ✔ Low Capacitance: 10pF ✔ RoHS Compliant MECHANICAL CHARACTERISTICS ✔ Molded JEDEC SOT-143 ✔ Weight 9 milligrams (Approximate) ✔ Available Lead-Free Pure-Tin Plating(Annealed) ✔ Solder Reflow Temperature: Pure-Tin - Sn, 100: 260-270°C ✔ Flammability Rating UL 94V-0 ✔ 8mm Tape and Reel Per EIA Standard 481 ✔ Marking: Marking Code PIN CONFIGURATION GND 1 4 REF I/O 2 3 I/O 05255.R0 9/06 1 www.protekdevices.com SR12 DEVICE CHARACTERISTICS MAXIMUM RATINGS @ 25°C Unless Otherwise Specified PARAMETER Peak Pulse Power (tp = 8/20µs) - See Figure 1 Operating Temperature Storage Temperature Peak Forward Voltage - IF = 1A, 8/20µs SYMBOL PPP TJ TSTG VF VALUE 500 -55°C to 150°C -55°C to 150°C 1.5 UNITS Watts °C °C Volts ELECTRICAL CHARACTERISTICS PER LINE PART NUMBER DEVICE MARKING RATED STAND-OFF VOLTAGE MINIMUM BREAKDOWN VOLTAGE @ 25°C Unless Otherwise Specified MAXIMUM CLAMPING VOLTAGE (See Fig. 2) 8/20µs VC @ IPP VOLTS 30.0V @ 16.0A MAXIMUM LEAKAGE CURRENT MAXIMUM CAPACITANCE (See Note 1) (See Fig. 5) (Per Data Line) @0V, 1 MHz CJ(SD) pF 10 MAXIMUM CLAMPING VOLTAGE (See Fig. 2) @ IP = 1A VC VOLTS 19.0 V WM VOLTS SR12 12A 12.0 @ 1mA V(BR) VOLTS 13.3 @ VWM ID µA 1.0 Note 1: As shown in Figure 5, REF 1 is connected to ground, REF 2 is connected to +VCC and input applies to VCC = 12V, Vsign = 30mV, F = 1MHz. FIGURE 1 PEAK PULSE POWER VS PULSE TIME 10,000 IPP - Peak Pulse Current - % of IPP PPP - Peak Pulse Current - Watts 120 100 80 60 40 20 0 tf FIGURE 2 PULSE WAVE FORM Peak Value IPP TEST WAVEFORM PARAMETERS tf = 8µs td = 20µs 1,000 500W, 8/20µs Waveform e-t 100 td = t I /2 PP 10 0.01 1 10 100 td - Pulse Duration - µs 1,000 10,000 0 5 10 15 20 t - Time - µs 25 30 05255.R0 9/06 2 www.protekdevices.com SR12 GRAPHS 100 80 % Of Rated Power FIGURE 3 POWER DERATING CURVE 20 Peak Pulse Power 8/20µs 5 Volts per Division FIGURE 4 OVERSHOOT & CLAMPING VOLTAGE 10 60 0 40 20 Average Power 0 0 25 50 75 100 125 TL - Lead Temperature - °C 150 -10 -20 ESD Test Pulse: 5 kilovolt, 1/30ns (waveform) FIGURE 5 INPUT CAPACITANCE CIRCUIT REF2 I/O +VCC VSIGN G REF1 16 FIGURE 6 TYPICAL REVERSE VOLTAGE VS CAPACITANCE 12 C - Capacitance - pF 8 4 0 0 1 2 3 VR - Reverse Voltage - Volts 4 5 05255.R0 9/06 3 www.protekdevices.com SR12 APPLICATION NOTE The SR12 is a low capacitance, unidirectional TVS array that is designed to protect I/O or high speed data lines from the damaging effects of ESD or EFT. This product series has a surge capability of 500 Watts PPP per line for an 8/20µs waveform and offers ESD protection > 25kV. COMMON-MODE CONFIGURATION (Figure 1) Ideal for use in USB applications, two SR12 devices provides up to two(2) lines of protection(per device) in a common-mode configuration as depicted in Figure 1. Circuit connectivity is as follows: ✔ Pins 2 and 3 are connected to the datalines. ✔ Pin 1 is connected to ground. ✔ Pin 4 is connected to the databus. CIRCUIT BOARD LAYOUT RECOMMENDATIONS Circuit board layout is critical for Electromagnetic Compatibility (EMC) protection. The following guidelines are recommended: ✔ The protection device should be placed near the input terminals or connectors, the device will divert the transient current immediately before it can be coupled into the nearby traces. The path length between the TVS device and the protected line should be minimized. All conductive loops including power and ground loops should be minimized. The transient current return path to ground should be kept as short as possible to reduce parasitic inductance. Ground planes should be used whenever possible. For multilayer PCBs, use ground vias. USB CONTROLLER Figure 1. Typical Common-Mode USB Protection VBus 1 4 VBus 2 3 D+ DUSB PORT ✔ ✔ ✔ VBus D+ D- USB PORT ✔ 2 3 VBus 1 4 05255.R0 9/06 4 www.protekdevices.com SR12 SOT-143 PACKAGE OUTLINE & DIMENSIONS PACKAGE OUTLINE SOT-143 A G L B S J DIM PACKAGE DIMENSIONS MILLIMETERS MIN MAX 2.80 1.20 0.84 0.39 0.79 1.78 0.013 0.08 0.46 0.445 0.72 2.11 3.04 1.39 1.14 0.50 0.93 2.03 0.10 0.15 0.60 0.60 0.83 2.48 INCHES MIN MAX 0.110 0.047 0.033 0.015 0.031 0.070 0.0005 0.003 0.018 0.0175 0.028 0.083 0.120 0.055 0.045 0.020 0.037 0.080 0.004 0.006 0.024 0.024 0.033 0.098 K F D H C R MOUNTING PAD TYPICAL DIM Millimeters Inches 1 2 3 4 5 6 7 8 9 10 1 1 2.85 2.00 1.80 1.90 1.05 2.75 1.20 0.80 0.85 0.85 0.85 0.112 0.079 0.071 0.075 0.041 0.108 0.047 0.031 0.033 0.033 0.033 A B C D F G H J K L R S NOTES 1 2 10 4 5 11 6 1. Dimensioning and tolerances per ANSI Y14.5M, 1985. 2. Controlling Dimension: Inches 3. Dimensions are exclusive of mold flash and metal burrs. TAPE & REEL ORDERING NOMENCLATURE 1. Surface mount product is taped and reeled in accordance with EIA-481. 2. Suffix-T7 = 7 Inch Reel - 3,000 pieces per 8mm tape, i.e., SR12-LF-T7. 3. Suffix-T13 = 13 Inch Reel - 10,000 pieces per 8mm tape, i.e., SR12-LF-T13. 4. Suffix - LF = Lead-Free, Pure-Tin Plating, i.e., SR12-LF-T7. 3 7 8 9 Outline & Dimensions: Rev 2 - 6/06, 06011 Tape & Reel Specifications (Dimensions in millimeters) Reel Dia. 178mm (7”) Tape Width 8mm A0 B0 K0 D E F W P0 P2 P tmax 0.25 3.10 ± 0.10 2.70 ± 0.10 1.35 ± 0.10 1.50 ± 0.10 1.75 ± 0.10 3.50 ± 0.05 8.00 ±0.30 4.00 ±0.10 2.00 ±0.05 4.00 ±0.10 P0 t D P2 10 Pitches Cumulative Tolerance on Tape. ± 0.2 E Top cover tape A0 K0 B0 F W P User Direction of Feed COPYRIGHT © ProTek Devices 2006 SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical characteristics described herein without notice (except JEDEC). DESIGN CHANGES: ProTek reserves the right to discontinue product lines without notice, and that the final judgement concerning selection and specifications is the buyer’s and that in furnishing engineering and technical assistance, ProTek assumes no responsibility with respect to the selection or specifications of such products. ProTek Devices 2929 South Fair Lane, Tempe, AZ 85282 Tel: 602-431-8101 Fax: 602-431-2288 E-Mail: sales@protekdevices.com Web Site: www.protekdevices.com www.protekdevices.com 05255.R0 9/06 5