05100 PLC497 . . . engineered solutions for the transient environment™ ULTRA LOW CAPACITANCE ARRAY APPLICATIONS ✔ Low Voltage Wireless Equiment ✔ Sensor & Control Circuits ✔ Ethernet - 10/100 Base T ✔ FireWire IEC COMPATIBILITY (EN61000-4) ✔ 61000-4-2 (ESD): Air - 15kV, Contact - 8kV ✔ 61000-4-4 (EFT): 40A - 5/50ns SOT-23 FEATURES ✔ 250 Watts Peak Pulse Power per Line (tp=8/20µs) ✔ Unidirectional Configuration ✔ ESD Protection > 25 kilovolts ✔ Low Clamping Voltage < 5 Volts ✔ ULTRA LOW CAPACITANCE 2.5pF MECHANICAL CHARACTERISTICS ✔ Molded JEDEC SOT-23 ✔ Weight 0.6 grams (Approximate) ✔ Flammability Rating UL 94V-0 ✔ 8mm Tape and Reel Per EIA Standard 481 ✔ Device Marking: Marking Code CIRCUIT DIAGRAM 1 3 2 05100.R3 6/02 1 www.protekdevices.com PLC497 DEVICE CHARACTERISTICS MAXIMUM RATINGS @ 25°C Unless Otherwise Specified SYMBOL VALUE UNITS Peak Pulse Power - tp=8/20µs PPP 250 W Operating Temperature TJ -55°C to 150°C °C Storage Temperature TSTG -55°C to 150°C °C PARAMETER ELECTRICAL CHARACTERISTICS PER LINE @ 25°C Unless Otherwise Specified PART NUMBER DEVICE MARKING CODE PLC497 LC RATED STAND-OFF VOLTAGE MINIMUM BREAKDOWN VOLTAGE (See Note 1) MAXIMUM REVERSE LEAKAGE CURRENT (See Note 1) MAXIMUM CLAMPING VOLTAGE (See Note 1) (See Fig. 2) MAXIMUM WORKING INVERSE BLOCKING VOLTAGE (See Note 2) INVERSE BLOCKING LEAKAGE CURRENT (See Note 2) MAXIMUM CAPACITANCE (See Note 3) VWM VOLTS @1mA V(BR) VOLTS @VWM ID µA @8/20µs VC @ IPP VWIB VOLTS @VWIB IR µA @0V, 1MHz C pF 1.0 1.3 20 5.0V @ 50A 75 1.0 2.5 Note 1: Apply positive voltage from pin2 to 1. Note 2: Apply positive voltage from pin 1 to 2. Note 3: Capcitance from pin 1 to 2 < 2.5pF. FIGURE 1 PEAK PULSE POWER VS PULSE TIME 120 IPP - Peak Pulse Current - % of IPP PPP - Peak Pulse Current - Watts 10,000 1,000 250W, 8/20µs Waveform 100 10 0.01 05100.R3 6/02 FIGURE 2 PULSE WAVE FORM tf 100 Peak Value IPP 80 e-t TEST WAVEFORM PARAMETERS tf = 8µs td = 20µs 60 40 td = t I /2 PP 20 0 1 10 100 td - Pulse Duration - µs 1,000 10,000 2 0 5 10 15 t - Time - µs 20 25 www.protekdevices.com 30 PLC497 GRAPHS FIGURE 3 POWER DERATING CURVE 100 Peak Pulse Power 8/20µs % Of Rated Power 80 60 40 20 Average Power 0 0 25 50 75 100 125 TL - Lead Temperature - °C 150 FIGURE 4 OVERSHOOT & CLAMPING VOLTAGE FOR PLC497 5 Volts per Division 35 25 15 5 -5 ESD Test Pulse: 25 kilovolt, 1/30ns (waveshape) FIGURE 5 TYPICAL CLAMPING VOLTAGE VS PEAK PULSE CURRENT VC - Clamping Voltage - Volts 16 PLC497 12 8 4 0 0 05100.R3 6/02 2 4 6 8 10 12 IPP - Peak Pulse Current - Amps 3 14 16 18 www.protekdevices.com PLC497 APPLICATION NOTE The PLC497 is an ultra low capacitance, bidirectional array that is designed to protect I/O or high speed data lines from the damaging effects of ESD or EFT. This product has a surge capability of 250 Watts PPP per line for an 8/20µs wave form and offers ESD protection > 40kV. TYPICAL DIFFERENTIAL MODE CONFIGURATION (Figure 1) The PLC497 is designed to protect one unidirectional line. Figure 1 shows a typical differential mode (line to line) I/O port protection circuit application. Pins 1 and 2 are connected to the data lines. Pin 3 is not connected. To achieve bidirectional protection, two PLC497 units are placed in parallel with opposing polarities within the circuit layout. TYPICAL COMMON MODE CONFIGURATION (Figure 2) The PLC497 can provide protection for sensor circuit applications. Figure 2 is a typical common mode (line to ground) sensor circuit application, shows two TVS devices with pins 1 connected to the line, pins 2 connected to ground and pins 3 unconnected. To achieve bidirectional protection in this application, a second pair of TVS devices is added in parallel with opposing polarities where pins 2 are connected to the line, pins 1 connected to ground and pins 3 unconnected. Figure 1. Typical Differential Mode i/o Port Protection Circuit CIRCUIT BOARD LAYOUT RECOMMENDATIONS LINE 1 IN Circuit board layout is critical for Electromagnetic Compatibility (EMC) protection. The following guidelines are recommended: ✔ 1 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. LINE 1 OUT 2 3 3 2 1 LINE 2 IN LINE 2 OUT Figure 2. Typical Common Mode Sensor Protection Circuit 1 2 3 SENSOR 3 2 1 2 3 2 05100.R3 6/02 4 CIRCUITRY 1 3 1 www.protekdevices.com PLC497 PACKAGE OUTLINE & DIMENSIONS PACKAGE OUTLINE SOT-23 A L 0º - 10º 3 B 1 S PACKAGE DIMENSIONS 2 K J DIM V A B C D G H J K L S V G C D H MOUNTING PAD MILLIMETERS MIN MAX 2.80 1.20 0.89 0.37 1.78 0.013 0.085 0.45 0.89 2.10 0.45 3.04 1.40 1.11 0.50 2.04 0.100 0.177 0.60 1.02 2.50 0.60 INCHES MIN MAX 0.1102 0.0472 0.0350 0.0150 0.0701 0.0005 0.0034 0.0180 0.0350 0.0830 0.0177 0.1197 0.0551 0.0440 0.0200 0.0807 0.0040 0.0070 0.0236 0.0401 0.0984 0.0236 NOTES: 1. Dimensioning and tolerances per ANSI Y14.5M, 1985. 2. Controlling Dimension: Inches 3. Pin 3 is the cathode (Unidirectional Only). 4. Dimensions are exclusive of mold flash and metal burrs. 0.037” (0.95mm) 0.079” (2.00mm) 0.033” (0.85mm) 0.033” (0.85mm) 06012 Rev 1 - 11/01 PART NUMBER SUFFIXES USED FOR TAPE & REEL/BULK ORDERING: Surface mount product is taped and reeled in accordance with EIA-481. Suffix-T7 = 7 Inch Reel - 3,000 pieces per reel i.e.: PLC497 - T7 Suffix-T13 = 13 Inch Reel - 10,000 pieces per reel i.e: PLC497 - T13 ProTek Devices 2929 South Fair Lane, Tempe, AZ 85282 Tel: 602-431-8101 Fax: 602-431-2288 E-Mail: [email protected] Web Site: www.protekdevices.com COPYRIGHT © ProTek Devices 2001 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. 05100.R3 6/02 5 www.protekdevices.com