LC04-6

Dual Low Capacitance TVS Array for Telecom Linecard Applications PROTECTION PROTECTION PRODUCTS Description The LC04-6 has been specifically designed to protect sensitive components which are connected to highspeed telecommunications lines from over voltages caused by lightning, electrostatic discharge (ESD), cable discharge events (CDE), and electrical fast transients (EFT). The device is in a JEDEC SO-16 NB package. It is designed to provide metallic surge protection for two tip and 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. LC04-6 Features Transient protection for high-speed data lines to 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 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 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 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 T1/E1 Line Cards Base Stations WAN Equipment C SU/DSU Multiplexers Routers ISP Equipment Customer Premise Equipment Circuit Diagram Pin 1 - 4 Schematic & PIN Configuration TIP RING Pin 13 - 16 SO-16 (Top View) Revision 04/12/05 1 www.semtech.com LC04-6 PROTECTION PRODUCTS Absolute Maximum Rating R ating Peak Pulse Power (tp = 10/1000µ s) Peak Pulse Current (tp = 10/1000 µ s) Peak Pulse Current (tp = 8/20µ s) Peak Pulse Current (tp = 10/560µ s) Lead Soldering Temp erature Op erating Temp erature Storage Temp erature Symbo l Pp k IP P IP P IP P TL TJ TSTG Value 1000 70 200 100 260 (10 sec.) -55 to +125 -55 to +150 Units Watts A A A °C °C °C Electrical Characteristics LC04-6 Par ame te r Reverse Stand-Off Voltage Reverse Breakdown Voltage Reverse Leakage Current Symbo l VRWM V BR IR It = 1mA VRWM = 6V, T=25°C VRWM = 3V, T=25°C Clamp ing Voltage Clamp ing Voltage Clamp ing Voltage Junction Cap acitance VC VC VC Cj IPP = 10A, tp = 10/1000µs IPP = 70A, tp = 10/1000µs IPP = 100A, tp = 8/20µs Each Line VR = 0V, f = 1MHz 6.8 15 2 12.5 15 20 15 Co nditio ns Minimum Typical Maximum 6 Units V V µA µA V V V pF  2005 Semtech Corp. 2 www.semtech.com LC04-6 PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time 100 Peak Pulse Power - Ppk (kW) Power Derating Curve 110 100 % of Rated Power or PP I 90 80 70 60 50 40 30 20 10 0 10 1 0.1 1 10 Pulse Duration - tp (µs) 100 1000 0 25 50 75 100 125 150 Ambient Temperature - TA (o C) 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 Parameter tr = 8µs td = 20µs 14 Clamping Voltage - VC (V) 12 10 8 6 4 2 0 0 10 20 30 40 50 60 70 80 Peak Pulse Current - IPP (A) Waveform Parameters: tr = 10µs td = 1000µs Capacitance vs. Reverse Voltage 14 12 Capacitance - Cj (pF) 10 8 6 4 2 0 0 1 2 3 4 5 6 7 Reverse Voltage - VR (V) Clamping Voltage vs. Peak Pulse Current 25 Clamping Voltage - VC (V) 20 15 10 Waveform Parameters: tr = 8µs td = 20µs 0 20 40 60 80 100 120 140 160 180 200 5 f=1MHz 0 Peak Pulse Current - IPP (A)  2005 Semtech Corp. 3 www.semtech.com LC04-6 PROTECTION PRODUCTS Applications Information Device Connection Options for Protection of Two High-Speed 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. T1/E1 Linecard Protection A typical T1/E1 linecard protection circuit is shown in Figure 2. The LC04-6 is connected between Tip and 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 5Ω (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. Figure 1 - Connection for Differential (Line-to-Line) Protection of two Tip/Ring Line Pairs TIP 1 RING 1 TIP 2 RING 2 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.  2005 Semtech Corp. 4 www.semtech.com LC04-6 PROTECTION PRODUCTS Typical Applications Figure 2 - T1/E1 Line Card protection Immunity Standar d Pe ak Ope n Cir cuit Sur ge Vo ltage ( V) Cur r e nt Wave fo r m (µs) 2/10 10/160 Pe ak Sho r t Cir cuit Sur ge Cur r e nt (A) 100 200 Sur ge Ge ne r ato r So ur ce R e sistance (W) 8 7.5 To tal So ur ce R e sistance (w ith 5W PTC o r LFC) (W) 13 12.5 Effe ctive Sho r t Sir cuit Cur r e nt (A) 61.5 120 Be llco r e GR -1089 Intr a-Building FCC Par t 68 800 1500 Table 1  2005 Semtech Corp. 5 www.semtech.com LC04-6 PROTECTION PRODUCTS Outline Drawing - SO-16 h A N 2X E/2 E1 E e D H GAGE PLANE 0.25 1 2 3 e/2 B D aaa C A2 A SEATING PLANE C bxN bbb 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 AC. h DIMENSIONS INCHES MILLIMETERS DIM MIN NOM MAX MIN NOM MAX A A1 A2 b c D E1 E e h L L1 N 01 aaa bbb ccc .053 .069 .004 .010 .049 .065 .012 .020 .007 .010 .386 .390 .394 .150 .154 .157 .236 BSC .050 BSC .010 .020 .016 .028 .041 (.041) 16 0° 8° .004 .010 .008 c L (L1) DETAIL 01 ccc C 2X N/2 TIPS A SIDE VIEW SEE DETAIL A 1.35 1.75 0.10 0.25 1.25 1.65 0.31 0.51 0.17 0.25 9.80 9.90 10.00 3.80 3.90 4.00 6.00 BSC 1.27 BSC 0.25 0.50 0.40 0.72 1.04 (1.04) 16 0° 8° 0.10 0.25 0.20 A1 C A-B D Land Pattern - SO-16 X DIM (C) G Z C G P X Y Z DIMENSIONS INCHES MILLIMETERS (.205) .118 .050 .024 .087 .291 (5.20) 3.00 1.27 0.60 2.20 7.40 Y 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. 304A.  2005 Semtech Corp. 6 www.semtech.com LC04-6 PROTECTION PRODUCTS Ordering Information Part Number LC04-6.TB LC04-6 Lead Finish SnPb SnPb Qty per Reel 500 48/Tube Reel Size 7 Inch N/A Contact Information Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804  2005 Semtech Corp. 7 www.semtech.com