LC04-6 Dual Low Capacitance TVS Array for Telecom Linecard Applications PROTECTION PRODUCTS Description Features u Transient protection for high-speed data lines to The LC04-6 has been specifically designed to protect sensitive components which are connected to highspeed telecommunications lines from over voltages caused by lightning, ESD (electrostatic discharge), and EFT (electrical fast transients). The device is in a JEDEC SO-16 NB package. It is designed to provide metallic surge protection for two tip & ring line pairs. The low capacitance topology means signal integrity is preserved on high-speed lines. The high surge capability (1000W, tp=10/1000µs) makes the LC04-6 suitable for telecommunications systems operating in harsh transient environments. The LC04-6 is designed to meet the lightning surge requirements of Bellcore GR-1089 (Intra-building) , FCC Part 68, ITU K.20, and IEC 61000-4-5. The features of the LC04-6 are ideal for protecting T1/E1 transceivers in WAN applications. u u u u u Bellcore GR-1089 IPP=70A (10/1000µs) Bellcore GR 1089 IPP=100A (2/10µs) ITU K.20 IPP=100A (5/310µs) IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact) IEC 61000-4-5 (Lightning) IPP=100A (8/20µs) Protects two tip and ring line pairs Low capacitance for high-speed interfaces High surge capability Low clamping voltage Solid-state silicon avalanche technology Mechanical Characteristics u u u u JEDEC SO-16 package Molding compound flammability rating: UL 94V-0 Marking : Part number, date code, logo Packaging : Tube or Tape and Reel per EIA 481 Applications u u u u u u u u Circuit Diagram T1/E1 Line Cards Base Stations WAN Equipment CSU/DSU Multiplexers Routers ISP Equipment Customer Premise Equipment Schematic & PIN Configuration TIP RING SO-16 (Top View) Revision 9/2000 1 www.semtech.com LC04-06 PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbo l Value Units Peak Pulse Pow er (tp = 10/1000µ s) Pp k 1000 Watts Peak Pulse Current (tp = 10/1000 µ s) I PP 70 A Peak Pulse Current (tp = 8/20µ s) I PP 200 A Peak Pulse Current (tp = 10/560µ s) I PP 100 A Lead Sold ering Temp erature TL 260 (10 sec.) °C Op erating Temp erature TJ -55 to +125 °C TSTG -55 to +150 °C Storage Temp erature Electrical Characteristics LC04-6 Par ame te r Symbo l Co nd itio ns Minimum Typ ical Maximum Units 6 V Reverse Stand -Off Voltage V RWM Reverse Breakd ow n Voltage V BR It = 1mA IR V RWM = 6V, T=25°C 15 µA V RWM = 3V, T=25°C 2 µA Reverse Leakage Current 6.8 V Clamp ing Voltage VC IPP = 10A , tp = 10/1000µ s 12.5 V Clamp ing Voltage VC IPP = 70A , tp = 10/1000µ s 15 V Clamp ing Voltage VC IPP = 100A , tp = 8/20µ s 20 V Junction Cap acitance Cj Each Line V R = 0V, f = 1MHz 15 pF ã 2000 Semtech Corp. 2 www.semtech.com LC04-06 PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 100 110 % of Rated Power or IPP Peak Pulse Power - P PP (kW) 100 10 90 80 70 60 50 40 30 20 10 0 1 0.1 1 10 100 0 1000 25 50 75 100 125 150 Ambient Temperature - TA (oC) Pulse Duration - tp (µs) Pulse Waveform Clamping Voltage vs. Peak Pulse Current 110 Waveform Parameters: tr = 8µs td = 20µs 90 Percent of IPP 80 70 e 60 14 Clamping Voltage - V C (V) 100 -t 50 40 td = IPP/2 30 20 12 10 8 6 Waveform Parameters: tr = 10µs td = 1000µs 4 2 10 0 0 0 5 10 15 20 25 0 30 10 20 30 40 50 60 70 80 Peak Pulse Current - IPP (A) Time (µs) Capacitance vs. Reverse Voltage (Each Line) 14 Capacitance (pF) 12 10 8 6 4 2 f=1MHz 0 0 1 2 3 4 5 6 7 Reverse Voltage (V) ã 2000 Semtech Corp. 3 www.semtech.com LC04-06 PROTECTION PRODUCTS Applications Information Device Connection Options for Protection of Two High-Speed Line Pairs Figure 1 - Connection for Differential (Line-to-Line) Protection of two Tip/Ring Line Pairs The LC04-6 is designed to protect four high-speed data lines (two differential pairs) from transient over-voltages which result from lightning and ESD. Protection of two line pairs is achieved by connecting the device as follows: Pins 1-4 are connected to line 1 of the first pair (i.e. Tip 1) and pins 13-16 are connected to line 2 of the first pair (i.e. Ring 1). Pins 5-8 are connected to line 1 of the second pair (i.e. Tip 2) and pins 9-12 are connected to line two of the second pair (i.e. Ring 2). All pins should be connected for best results. Minimize parasitic inductance in the protection circuit path by keeping the trace length between the protected line and the LC04-6 as short as possible. TIP 1 RING 1 TIP 2 RING 2 T1/E1 Linecard Protection A typical T1/E1 linecard protection circuit is shown in Figure 2. The LC04-6 is connected between Tip & Ring on the transmit and receive line pairs. It provides protection to metallic (line-to-line) lightning and ESD surges. It is designed to meet the intra-building requirements of Bellcore GR-1089. This design takes advantage of the isolation of the transformer to suppress common mode surges. The LC04-6 may also be configured to meet metallic surges of FCC Part68 when used in conjunction with a 5W (minimum) PTC or line feed resistor (LFR). The PTC (or LFR + fuse) are required to meet the AC power cross requirements, but will also reduce the effective surge current to levels within the capability of the LC04-6 (Table 1). 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. The versatility of the LC04-6 makes it ideal for use with combination long haul/short haul T1/E1 transceivers. ã 2000 Semtech Corp. 4 www.semtech.com LC04-06 PROTECTION PRODUCTS Typical Applications Figure 2 - T1 Line Card protection Immunity Stand ar d Pe ak Op e n Cir cuit Sur ge Vo ltage Cur r e nt Wave fo r m (µs) Pe ak Sho r t Cir cuit Sur ge Cur r e nt (A) Sur ge Ge ne r ato r So ur ce R e sistance (W) To tal So ur ce R e sistance (with 5W PTC o r LFC) (W) Effe ctive Sho r t Sir cuit Cur r e nt (A) ( V) Be llco r e GR -1089 Intr a-Build ing 800 2/10 100 8 13 61.5 FCC Par t 68 1500 10/160 200 7.5 12.5 120 Table 1 ã 2000 Semtech Corp. 5 www.semtech.com LC04-06 PROTECTION PRODUCTS Outline Drawing - SO-16 Land Pattern - SO-16 ã 2000 Semtech Corp. 6 www.semtech.com LC04-06 PROTECTION PRODUCTS Ordering Information P ar t Numbe r Wo r king Vo ltage Qty p e r Reel R e e l Size LC04-6.TB 6V 500 7 Inch LC04-6.TE 6V 2500 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. 7 www.semtech.com