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| Low Capacitance TVS for High-Speed Telecommunication Systems PROTECTION PRODUCTS Description The LC01-6 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 LC01-6 is designed for metallic mode, secondary line side protection in digital line card applications. It features solid-state silicon-avalanche technology for unmatched transient protection without device degradation. The LC01-6 combines TVS diodes with low capacitance compensation diodes to provide an integrated, low capacitance protection solution. Additional features include sub-nanosecond response time, a low operating voltage of 6 volts, and low clamping voltage. The LC01-6 is suitable for use on T1/E1 and xDSL interfaces in equipment such as base stations, routers, and channel service units. The LC01-6 meets the longhaul (outer-building) transient immunity requirements of Bellcore 1089, FCC Part 68 (Type A and B surges), and IEC 61000-4-5. LC01-6 Features u 1500 watts peak pulse power (tp = 10/1000s) u Transient protection for high speed data lines to IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact) IEC 61000-4-5 (Lightning) 95A (8/20s) Bellcore 1089 (Outer-Building), 100A (10/1000s), 500A (2/10s) FCC Part 68 200A (10/160s) ITU K.20 200A (5/310s) Differential protection for one Tip & Ring line pair Low capacitance for high speed interfaces Low operating & clamping voltage Integrated structure saves board space and increases reliability Solid-state silicon-avalanche technology JEDEC SO-16W 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 u u u u u u u u u u u u u u u Mechanical Characteristics Applications T1/E1 Line Cards Base Stations WAN Interfaces xDSL Interfaces CSU/DSU Equipment Circuit Diagram Schematic & PIN Configuration SO-16W (Top View) Revision 9/2000 1 www.semtech.com LC01-6 PROTECTION PRODUCTS Absolute Maximum Rating R ating Peak Pulse Pow er (tp = 10/1000s) Peak Pulse Current (tp = 10/1000s) Peak Pulse Current (tp = 10/160s) Thermal Resistance Junction to Case Thermal Resistance Junction to Amb ient Lead Soldering Temp erature Op erating Temp erature Storage Temp erature Symbo l Pp k I PP I PP qJC qJA TL TJ TSTG Value 1500 100 200 30 95 260 (10 sec.) -55 to +125 -55 to +150 Units Watts A A C/W C/W C C C Electrical Characteristics LC01-6 Par ame te r Reverse Stand -Off Voltage Reverse Breakd ow n Voltage Reverse Leakage Current Clamp ing Voltage Clamp ing Voltage Temp erature Coefficient of Breakd ow n Voltage Junction Cap acitance Symbo l VRWM V BR IR VC VC aTVBR Cj V R = 0V, f = 1MHz It = 1mA V RWM = 6V, T=25C IPP = 100A tp = 10/1000 s IPP = 200A tp = 10/160 s 3 50 8 25 15 16 Co nd itio ns Minimum Typ ical Maximum 6 Units V V A V V mV /C pF a 2000 Semtech Corp. 2 www.semtech.com LC01-6 PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time 100 110 100 Peak Pulse Power - P PP (kW) 90 % of Rated Power or IPP 80 70 60 50 40 30 20 10 1 0.1 1 10 Pulse Duration - tp (s) 100 1000 0 0 25 50 75 100 125 150 175 Ambient Temperature - TA (oC) Power Derating Curve 10 Pulse Waveform 110 100 90 80 Percent of IPP 70 60 50 40 30 20 10 0 0 10 Time (s) 1000 3000 td = IPP/2 e-t Waveform Parameters: tr = 10s td = 1000s Clamping Voltage vs. Peak Pulse Current 14 12 Clamping Voltage - VC (V) 10 8 6 4 2 0 0 10 20 30 40 50 60 70 80 90 100 110 Peak Pulse Current - IPP (A) Waveform Parameters: tr = 10s td = 1000s Capacitance vs. Reverse Voltage 41.5 41 Typical Capacitance (pF) 40.5 40 39.5 39 38.5 0 1 2 3 Reverse Voltage (V) 4 5 6 Pins 1-8 tied together Pins 9 - 16 tied together f = 1MHz Power (Watts) 6 5 4 3 2 1 0 1 AC Power Dissipation 10 Time (Seconds) 100 1000 a 2000 Semtech Corp. 3 www.semtech.com LC01-6 PROTECTION PRODUCTS Applications Information Device Connection Options for Protection of HighSpeed Data Lines The LC01-6 is designed to protect high-speed data lines from transient over-voltages which result from lightning and ESD. The device is designed to protect one line pair in differential (Line-to-Line) mode. Pins 18 are connected to line 1 and pins 9-16 are connected to line 2 as shown. All pins should be connected for best results. T1/E1 Linecard Protection A typical long-haul T1/E1 linecard protection circuit is shown below. The LC01-6 is connected between Tip & Ring on the transmit and receive line pairs. It provides protection to metallic (line-to-line) lightning surges per Bellcore 1089 and FCC Part 68. Depending on the application, a high voltage crowbar device (not shown) such as a gas discharge tube (GDT) or TVS Thyristor may be used to suppress common mode (line-toground) surges. To complete the protection circuit, the SRDA05-4 (or SRDA3.3-4 for 3.3V supplies) is employed as the secondary 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. Positive temperature coefficient (PTC) resistors or fuses are also required for AC power cross protection. For further information, reference Semtech application note AN97-10. Figure 1 - Schematic and Pin Configuration Figure 2 - Connection for Differential Protection (Line-to-Line) a 2000 Semtech Corp. 4 www.semtech.com LC01-6 PROTECTION PRODUCTS Typical Applications T1 Line Card Protection (Long-Haul Applications) SDSL Protection a 2000 Semtech Corp. 5 www.semtech.com LC01-6 PROTECTION PRODUCTS Outline Drawing - SO-16W Land Pattern - SO-16W a 2000 Semtech Corp. 6 www.semtech.com LC01-6 PROTECTION PRODUCTS Ordering Information P ar t Numbe r LC01-6.TD Wo r king Vo ltage 6V Qty p e r Reel 1000 R e e l Size 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 a 2000 Semtech Corp. 7 www.semtech.com |
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