LC03-6 PROTECTION PRODUCTS Description Low Capacitance TVS for High-Speed Data Interfaces Features The LC03-6 transient voltage suppressor is designed to protect components which are connected to high speed telecommunication lines from voltage surges caused by lightning, electrostatic discharge (ESD), cable discharge events (CDE), and electrical fast transients (EFT). 2000 watts peak pulse power (tp = 8/20µs) Transient protection for high-speed data lines to TVS diodes are ideal for use as board level protection of sensitive semiconductor components. The LC03-6 combines a TVS diode with a rectifier bridge to provide transient protection in both common and differential mode with a single device. The capacitance of the device is minimized (< 25pF) to ensure correct signal transmission on high speed lines . The LC03-6 meets the short-haul (intra-building) transient immunity requirements of Bellcore 1089 for telecommunications applications. Bellcore 1089 (Intra-Building) 100A (2/10µs) ITU K.20 IPP=40A (5/310µs) IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 100A (8/20µs) Protects two lines in common and differential mode Low capacitance for high-speed interfaces Low clamping and operating voltage Integrated structure saves board space and increases reliability Solid-state silicon avalanche technology Mechanical Characteristics The SO-8 surface mount package allows flexibility in the design of crowded PC boards. JEDEC SO-8 package RoHS/WEEE Compliant UL 497B listed Molding compound flammability rating: UL 94V-0 Marking : Part number, date code Packaging : Tube or Tape and Reel per EIA 481 Applications Circuit Diagram T1/E1 Line Cards T3/E3 and DS3 Interfaces STS-1 Interfaces ISDN S/T-Interfaces ISDN U-Interfaces 10/100 Ethernet Schematic & PIN Configuration 1 8 2 7 3 6 4 5 Pin 1 and 8 Pin 2, 3, 6, and 7 Ground Pin 4 and 5 SO-8 (Top View) Revision 01/18/2008 1 www.semtech.com LC03-6 PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbol Value Units Peak Pulse Power (tp = 8/20µs) Pp k 2000 Watts Peak Pulse Current (tp = 8/20µs) IP P 100 A Lead Soldering Temperature TL 260 (10 sec.) °C Operating Temperature TJ -55 to +125 °C TSTG -55 to +150 °C Storage Temperature Electrical Characteristics LC03-6 Parameter Symbol Conditions Minimum Typical Maximum Units 6 V Reverse Stand-Off Voltage VRWM Reverse Breakdown Voltage V BR It = 1mA Reverse Leakage Current IR VRWM = 6V, T=25°C 25 µA Clamp ing Voltage VC IPP = 50A, tp = 8/20µs Line-to-Ground 15 V Clamp ing Voltage VC IPP = 100A, tp = 8/20µs Line-to-Ground 20 V Junction Cap acitance Cj Between I/O p ins and Ground VR = 0V, f = 1MHz 16 25 pF Between I/O p ins VR = 0V, f = 1MHz 8 12 pF 2008 Semtech Corp. 2 6.8 V www.semtech.com LC03-6 PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 100 110 Peak Pulse Power - Ppk (kW) 100 % of Rated Power or IPP 90 10 1 80 70 60 50 40 30 20 10 0.1 0.1 1 10 100 0 1000 0 Pulse Duration - tp (µs) 90 125 150 175 18 16 Clamping Voltage - VC (V) 80 Percent of IPP 100 20 W aveform Parameters: tr = 8µs td = 20µs 100 e -t 60 50 td = I PP /2 30 20 L in e-T o-L in e 14 12 L in e -T o -G rou n d 10 8 W a v efo rm P ara m e ters : tr = 8 µ s td = 2 0 µ s 6 4 10 2 0 0 5 10 15 20 25 0 30 0 T im e (µs) 10 20 30 40 50 60 70 80 90 100 11 0 P e a k P u lse C u r re n t - I P P (A ) Normalized Capacitance vs. Reverse Voltage Forward Voltage vs. Forward Current 1.4 6 1.2 5 Forward Voltage - VF (V) 1 C J(VR ) / C J(VR =0) 75 Clamping Voltage vs. Peak Pulse Current 110 40 50 Ambient Temperature - TA (oC) Pulse Waveform 70 25 0.8 0.6 0.4 4 3 W a v efo rm P ara m e ters : tr = 8 µ s td = 2 0 µ s 2 1 0.2 f = 1MHz 0 0 0 1 2008 Semtech Corp. 2 3 4 Reverse Voltage - VR (V) 5 6 0 10 20 30 40 50 60 70 80 90 100 11 0 F o r w a r d C u r r e n t - I F (A ) 3 www.semtech.com LC03-6 PROTECTION PRODUCTS Typical Characteristics Insertion Loss S21 - I/O to Gnd Insertion Loss S21 - I/O to I/O CH1 S21 LOG 6 dB / REF 0 dB CH1 S21 LOG 6 dB / REF 0 dB 1: -3.03 dB 910 MHz 0 dB 4 2: -2.84 dB 900 MHz -12 dB 4 2 -12 dB -24 dB -30 dB -30 dB -36 dB -36 dB -42 dB -42 dB -48 dB 1 MHz START . 030 MHz 2008 Semtech Corp. 10 MHz 100 MHz -48 dB 3 1 GHz GHz STOP 3000. 000000 MHz 3 1 MHz START . 030 MHz 4 3: -23.03 dB 1.8 GHz 4: -6.17 dB 2.5 GHz -18 dB 3 -24 dB 1 -6 dB 4: -2.97 dB 2.5 GHz -18 dB 2: -7.11 dB 900 MHz 0 dB 3: -20.79 dB 1.8 GHz 21 -6 dB 1: -3.03 dB 642 MHz 10 MHz 100 MHz 3 1 GHz GHz STOP 3000. 000000 MHz www.semtech.com LC03-6 PROTECTION PRODUCTS Applications Information Device Connection Options for Protection of Two High-Speed Data Lines Connection for Differential (Line-to-Line) and Common Mode Protection (Line-to-Ground) The LC03-6 is designed to protect two high-speed data lines (one differential pair) from transient over-voltages which result from lightning and ESD. The device can be configured to protect in differential (Line-to-Line) and common (Line-to-Ground) mode. Data line inputs/ outputs are connected at pins 1 to 8, and 4 to 5 as shown. Pins 2, 3, 6, and 7 are connected to ground. These pins should be connected directly to a ground plane on the board for best results. The path length is kept as short as possible to minimize parasitic inductance. In applications where high common mode voltages are present, differential protection is achieved by leaving pins 2, 3, 6, and 7 not connected. Connection for Differential Protection (Line-to-Line) T1/E1 Linecard Protection (Intra-Building) A typical T1/E1 linecard protection circuit is shown below. The LC03-6 is connected between Tip and Ring on the transmit and receive line pairs. It provides protection to metallic and common mode lightning surges per Bellcore 1089. This design takes advantage of the isolation of the transformer to suppress common mode surges. To complete the protection circuit, the RClamp3304N (or RClamp0504N for 5V supplies) is employed as the IC side protection element. This device helps prevent the transceiver from latching up by providing fine clamping of transients that are coupled through the transformer. For further information, reference Semtech application note AN97-10. Matte Tin Lead Finish Matte tin has become the industry standard lead-free replacement for SnPb lead finishes. A matte tin finish is composed of 100% tin solder with large grains. Since the solder volume on the leads is small compared to the solder paste volume that is placed on the land pattern of the PCB, the reflow profile will be determined by the requirements of the solder paste. Therefore, these devices are compatible with both lead-free and SnPb assembly techniques. In addition, unlike other lead-free compositions, matte tin does not have any added alloys that can cause degradation of the solder joint. T3/E3 and STS-1 Protection The LC03-6 can also be used to protect T3/E3 and STS-1 interfaces. The data lines from the BNC interface are run through the LC03-6 (i.e. enters at pin 1 and exits at pin 8) with the ground connection made at the other side of the device (pins 4 and 5). The center pins (2, 3, 6, and 7) are not connected. In this configuration, the LC03-6 adds less than 12pF of capacitance to each line and provides surge protection to 100A (tp=8/20µs). 2008 Semtech Corp. 5 www.semtech.com LC03-6 PROTECTION PRODUCTS Typical Applications 1 8 2 7 3 6 4 5 LC03-6 RClamp3304N 1 8 2 7 3 6 4 5 LC03-6 T1 Line Card Protection (Short-Haul Applications) 1 8 2 7 3 6 4 5 DS3, T3, E3, or STS-1 1 8 2 7 3 6 4 5 T3/E3 and STS-1 Protection 2008 Semtech Corp. 6 www.semtech.com LC03-6 PROTECTION PRODUCTS Typical Applications (Continued) LC03-6 LC03-6 ISDN S-Interface Protection ISDN U-Interface Secondary Protection 2008 Semtech Corp. 7 www.semtech.com LC03-6 PROTECTION PRODUCTS Typical Applications (Continued) 10/100 Ethernet Protection High Speed Driver/Receiver Protection 2008 Semtech Corp. 8 www.semtech.com LC03-6 PROTECTION PRODUCTS Applications Information - SPICE Model 0.7 nH D2 D2 D1 D2 D2 LC03-6 Spice Model LC03-6 Spice Parameters 2008 Semtech Corp. Parameter Unit D1 (T VS) D2 (LCR D) IS Amp 1.0E-20 3.98E-13 BV Volt 7.9 240 VJ Volt 0.6 0.64 RS Ohm 0.102 0.048 IB V Amp 1E-3 1E-3 CJO Farad 3.4e-9 8.0E-12 TT sec 2.541E-9 2.541E-9 M -- 0.007 0.022 N -- 1.1 1.1 EG eV 1.11 1.11 9 www.semtech.com LC03-6 PROTECTION PRODUCTS Outline Drawing - SO-8 A h D e N h H 2X E/2 E1 E 1 0.25 L (L1) e/2 DETAIL B 01 A D aaa C SEATING PLANE A2 A C SEE DETAIL A .053 .069 .004 .010 .049 .065 .012 .020 .010 .007 .189 .193 .197 .150 .154 .157 .236 BSC .050 BSC .010 .020 .016 .028 .041 (.041) 8 8° 0° .004 .010 .008 1.75 1.35 0.10 0.25 1.25 1.65 0.51 0.31 0.17 0.25 4.80 4.90 5.00 3.80 3.90 4.00 6.00 BSC 1.27 BSC 0.25 0.50 0.40 0.72 1.04 (1.04) 8 0° 8° 0.10 0.25 0.20 SIDE VIEW A1 bxN bbb DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX A A1 A2 b c D E1 E e h L L1 N 01 aaa bbb ccc c GAGE PLANE 2 ccc C 2X N/2 TIPS DIM C A-B D 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 MS-012, VARIATION AA. Land Pattern - SO-8 X DIM (C) G C G P X Y Z Z Y DIMENSIONS INCHES MILLIMETERS (.205) .118 .050 .024 .087 .291 (5.20) 3.00 1.27 0.60 2.20 7.40 P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 2. REFERENCE IPC-SM-782A, RLP NO. 300A. 2008 Semtech Corp. 10 www.semtech.com LC03-6 PROTECTION PRODUCTS Ordering Information Par t Number Lead Finish Qty per Reel R eel Size LC03-6.TB SnPb 500 7 Inch LC03-6.TBT Pb free 500 7 Inch Contact Information Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 2008 Semtech Corp. 11 www.semtech.com