LC03-6TB

Low Capacitance Surface Mount TVS for High-Speed Data Interfaces PROTECTION PRODUCTS Description 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), and electrical fast transients (EFT). 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. The SO-8 surface mount package allows flexibility in the design of crowded PC boards. LC03-6 Features u 2000 watts peak pulse power (tp = 8/20µs) u Transient protection for high-speed data lines to 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) 24A (1.2/50µs) 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 u u u u u u u u u u u u u u u u Mechanical Characteristics JEDEC SO-8 package UL 497B listed Molding compound flammability rating: UL 94V-0 Marking : Part number, date code, logo Packaging : Tube or Tape and Reel per EIA 481 Applications T1/E1 Line Cards T3/E3 and DS3 Interfaces STS-1 Interfaces ISDN S/T-Interfaces ISDN U-Interfaces 10/100 Ethernet Circuit Diagram Schematic & PIN Configuration 1 8 2 7 3 6 4 5 SO-8 (Top View) Revision 9/2000 1 www.semtech.com LC03-6 PROTECTION PRODUCTS Absolute Maximum Rating R ating Peak Pulse Pow er (tp = 8/20µ s) Peak Pulse Current (tp = 8/20µ s) Lead Sold ering Temp erature Op erating Temp erature Storage Temp erature Symbo l Pp k I PP TL TJ TSTG Value 2000 100 260 (10 sec.) -55 to +125 -55 to +150 Units Watts A °C °C °C Electrical Characteristics LC03-6 Par ame te r Reverse Stand -Off Voltage Reverse Breakd ow n Voltage Reverse Leakage Current Clamp ing Voltage Clamp ing Voltage Junction Cap acitance Symbo l V RWM V BR IR VC VC Cj It = 1mA V RWM = 6V, T=25°C IPP = 50A , tp = 8/20µ s IPP = 100A , tp = 8/20µ s Betw een I/O p ins and Gnd V R = 0V, f = 1MHz Betw een I/O p ins V R = 0V, f = 1MHz 16 6.8 25 15 20 25 Co nd itio ns Minimum Typ ical Maximum 6 Units V V µA V V pF 8 12 pF ã 2000 Semtech Corp. 2 www.semtech.com LC03-6 PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time 100 Power Derating Curve 110 100 Peak Pulse Power - PPP (kW) 90 % of Rated Power or IPP 0.1 1 10 Pulse Duration - tp (µs) 100 1000 10 80 70 60 50 40 30 20 10 1 0.1 0 0 25 50 75 100 125 150 175 Ambient Temperature - TA (oC) Pulse Waveform 110 100 90 80 Percent of IPP 70 60 50 40 30 20 10 0 0 5 10 15 Time (µs) 20 25 30 td = IPP/2 e -t Clamping Voltage vs. Peak Pulse Current Waveform Parameters: tr = 8µs td = 20µs 20 18 Clamping Voltage - V (V) C 16 14 12 Line-To-Ground 10 8 6 4 2 0 0 10 20 30 40 50 60 70 80 90 100 110 P eak Pulse Current - IPP ( A) Line-To -Line W aveform Parameters: tr = 8 µs td = 20 µs Capacitance vs. Reverse Voltage 18 Line-to-Ground 16 14 Capacitance (pF) 12 10 8 6 4 2 0 0 1 2 3 4 5 6 7 Reverse Voltage (V) Line-to-Line ã 2000 Semtech Corp. 3 www.semtech.com LC03-6 PROTECTION PRODUCTS Applications Information Device Connection Options for Protection of Two High-Speed Data Lines 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. T1/E1 Linecard Protection (Intra-Building) A typical T1/E1 linecard protection circuit is shown below. The LC03-6 is connected between Tip & 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 SRDA05-4 (or SRDA3.3-4 for 3.3V 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 T3/E3 & 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 & 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=8/20ms). Connection for Differential (Line-to-Line) and Common Mode Protection (Line-to-Ground) Connection for Differential Protection (Line-to-Line) ã 2000 Semtech Corp. 4 www.semtech.com LC03-6 PROTECTION PRODUCTS Typical Applications T1 Line Card Protection (Short-Haul Applications) T3/E3 & STS-1 Protection ã 2000 Semtech Corp. 5 www.semtech.com LC03-6 PROTECTION PRODUCTS Typical Applications (Continued) LC03-6 LC03-6 ISDN S-Interface Protection ISDN U-Interface Secondary Protection ã 2000 Semtech Corp. 6 www.semtech.com LC03-6 PROTECTION PRODUCTS Typical Applications (Continued) 10/100 Ethernet Protection High Speed Driver/Receiver Protection ã 2000 Semtech Corp. 7 www.semtech.com LC03-6 PROTECTION PRODUCTS Outline Drawing - SO-8 Land Pattern - SO-8 ã 2000 Semtech Corp. 8 www.semtech.com LC03-6 PROTECTION PRODUCTS Ordering Information P ar t Numbe r LC03-6.TB LC03-6.TE Wo r king Vo ltage 6V 6V Qty p e r Reel 500 2500 R e e l Size 7 Inch 13 Inch Note: (1) No suffix indicates tube pack. Contact Information Semtech Corporation Protection Products Division 652 Mitchell Rd., Newbury Park, CA 91320 Phone: (805)498-2111 FAX (805)498-3804 ã 2000 Semtech Corp. 9 www.semtech.com