RClamp7002M RailClamp Low Capacitance TVS Diode Array PROTECTION PRODUCTS - RailClamp Description Features RailClamps are surge rated diode arrays designed to protect high speed data interfaces. The RClamp series has been specifically designed to protect sensitive components from overvoltage caused by ESD (electrostatic discharge), CDE (cable discharge events), EFT (electrical fast transients), and lightning. The RClampTM7002M has been optimized for use on the next generation of ADSL interfaces. Their high surge capability makes them particularly useful in systems that utilize gas tubes as the primary protection component. This device integrates surge rated, low capacitance steering diodes in a small MSOP-10L package. Each protection diode features a large area junction to minimize clamping voltage and increase reliability during high current surges. It has a maximum capacitance of only 10pF and may be used to protect two high-speed lines without sacrificing signal integrity. The RClamp7002M may be used on systems operating from 3.3 to 70 volts. This means that they may be used in applications that use the Central Office battery as the main supply. The RClamp7002M is also designed for easy board layout by allowing the signal traces to run straight through the device. The high surge capability, ease of layout coupled with the low capacitance and clamping voltage of the RClamp7002M makes it the superior choice for protecting two high speed lines against high energy telecommunication surges. 1000 Watts peak pulse power (8/20µs) Protection for high-speed data lines to IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 1kV, 24A (1.2/50µs) Low clamping voltage: 10V at Ipp = 40A (8/20µs) Array of surge rated suppression diodes Protects two high speed lines Low capacitance: 10pF (I/O to Ground) Operating voltage range: 3.3 - 70V Small package saves board space Solid-state silicon-avalanche technology Mechanical Characteristics JEDEC MSOP-10L package Molding compound flammability rating: UL 94V-0 Marking: Marking code and date code Packaging: Tape and Reel per EIA 481 Lead Finish: Matte tin RoHS/WEEE Compliant Applications Circuit Diagram ADSL Lines Central Office Equipment T1/E1 secondary IC Side Protection Small Office Home Office (SOHO) Applications WAN/LAN Equipment ISDN S/T Interface ATM Interfaces PIN Configuration Pin 7, 8, 9 Pin 1 Pin 10 Pin 5 Pin 6 Line 1 1 In Line 1 Out GND Vcc GND Vcc GND Vcc Line 2 In Line 2 Out Pin 2, 3,4 MSOP-10L (Top View) Revision 12/26/2005 1 www.semtech.com RClamp7002M PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbol Value Units Peak Pulse Power (tp = 8/20µs) P PP 1000 W Peak Pulse Current (tp = 8/20µs) IP P 70 A ESD p er IEC 61000-4-2 (Air) ESD p er IEC 61000-4-2 (Contact) VESD 15 8 kV TJ -55 to +125 °C TSTG -55 to +150 °C Op erating Temp erature Storage Temp erature Electrical Characteristics (T=25oC) Parameter Symbol Conditions Minimum Typical Maximum Units 70 V Reverse Stand-Off Voltage VRWM Reverse Breakdown Voltage V BR It = 50µA Reverse Leakage Current IR VRWM = 70V, T=25°C 5 µA Forward Voltage Vf If = 15mA 1.2 V Clamp ing Voltage VC IPP = 1A, tp = 8/20µs Any I/O p in to Ground 1.5 V Clamp ing Voltage VC IPP = 40A, tp = 8/20µs Any I/O p in to Ground 10 V Clamp ing Voltage VC IPP = 70A, tp = 8/20µs Any I/O p in to Ground 14.3 V Junction Cap acitance Cj VR = 0V, f = 1MHz Any I/O p in to Ground 10 pF VR = 0V, f = 1MHz Between I/O p ins 2005 Semtech Corp. 2 85 V 3 pF www.semtech.com RClamp7002M PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 10 110 % of Rated Power or IPP Peak Pulse Power - P PP (kW) 100 1 90 80 70 60 50 40 30 20 10 0 0 0.1 0.1 1 10 100 25 50 75 100 125 150 Ambient Temperature - TA (oC) 1000 Pulse Duration - tp ( s) Pulse Waveform Capacitance vs. Reverse Voltage 110 90 70 e 60 1.0 Normalized Capacitance 80 Percent of IPP 1.2 Waveform Parameters: tr = 8µs td = 20µs 100 -t 50 40 td = IPP/2 30 20 0.8 0.6 10 f = 1 MHz 0.4 0 0 5 10 15 20 25 0 30 10 20 30 40 50 60 70 Reverse Voltage - VR (V) Time (µs) Insertion Loss S21 Forward Voltage vs. Forward Current CH1 S21 LOG 6 dB / REF 0 dB 1: -.3775 dB 900 MHz 14 12 2: -3.1072 dB 1.8 GHz 0 dB Forward Voltage (V) 1 10 -6 dB 8 -12 dB 6 -18 dB 4 3 3: -11.75 dB 2.5 GHz -24 dB Waveform Parameters: tr = 8µs td = 20µs 2 2 -30 dB -36 dB 0 0 20 40 60 -42 dB 80 Peak Pulse Current (A) START . 030 MHz 2005 Semtech Corp. 3 STOP 3000. 000000 MHz www.semtech.com RClamp7002M PROTECTION PRODUCTS Applications Information Schematic Device Connection Options for Protection of Two High-Speed Data Lines Pin 7, 8, 9 This device is designed to protect two data lines from transient over-voltages by clamping them to a fixed reference. When the voltage on the protected line exceeds the reference voltage (plus diode VF) the steering diodes are forward biased, conducting the transient current away from the sensitive circuitry. Data line inputs are connected at pins 1 and 5. The outputs are connected at pins 10 and 6 respectively. The negative reference is connected at pins 2, 3, and 4. 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. The positive reference is connected at pins 7, 8, and 9. The options for connecting the positive reference are as follows: Pin 1 Pin 5 Pin 6 Pin 2, 3,4 Pin Configuration 1. To protect data lines and the power line, connect pins 7, 8 and 9 directly to the positive supply rail (VCC). In this configuration the data lines are referenced to the supply voltage. An external TVS diode may be added between the supply rail and ground in order to prevent over-voltage on the supply rail. 2. In applications where no positive supply reference is available, or complete supply isolation is desired, an external TVS diode may be used as the reference. The steering diodes will begin to conduct when the voltage on the protected line exceeds the working voltage of the TVS (plus one diode drop). 2005 Semtech Corp. Pin 10 4 Line 1 1 In Line 1 Out GND Vcc GND Vcc GND Vcc Line 2 In Line 2 Out www.semtech.com RClamp7002M PROTECTION PRODUCTS Applications Information - Spice Model Vcc I/O 0.7 nH RClamp7002M Spice Model Table 1 - R Clamp7002M Spice Parameters 2005 Semtech Corp. Parameter Unit D1 (LCR D) D2 (LCR D) IS Amp 1.0E-20 1.0E-20 BV Volt 200 200 VJ Volt 0.53 0.53 RS Ohm 0.037 0.14 IB V Amp 1E-3 1E-3 CJO Farad 3.5E-12 3.5E-12 TT sec 2.541E-9 2.541E-9 M -- 0.142 0.142 N -- 1.1 1.1 EG eV 1.11 1.11 5 www.semtech.com RClamp7002M PROTECTION PRODUCTS Outline Drawing Drawing -- MSOP SO-8 10L Outline e A DIM D N SIDE VIEW 2X E/2 H 12 c GAGE PLANE B 0.25 L (L1) D DETAIL aaa C SEATING PLANE A2 C A A1 A2 b c D E1 E e L L1 N 01 aaa bbb ccc A E E1 PIN 1 INDICATOR ccc C 2X N/2 TIPS SEE DETAIL 01 DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX .043 .000 .006 .030 .037 .007 .011 .003 .009 .114 .118 .122 .114 .118 .122 .193 BSC .020 BSC .016 .024 .032 (.037) 10 0° 8° .004 .003 .010 1.10 0.00 0.15 0.75 0.95 0.17 0.27 0.08 0.23 2.90 3.00 3.10 2.90 3.00 3.10 4.90 BSC 0.50 BSC 0.40 0.60 0.80 (.95) 10 0° 8° 0.10 0.08 0.25 A A A1 bxN bbb 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 MO-187, VARIATION BA. Land Pattern - MSOP 10L X DIM (C) G C G P X Y Z Z Y DIMENSIONS INCHES MILLIMETERS (.161) .098 .020 .011 .063 .224 (4.10) 2.50 0.50 0.30 1.60 5.70 P NOTES: 1. 2005 Semtech Corp. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 6 www.semtech.com RClamp7002M PROTECTION PRODUCTS Marking Codes 702M XXXX * XXXX = Date Code ** Dot indicates Pin 1 Ordering Information Part Number Working Voltage Qty per Reel R eel Size RClamp 7002M.TBT 5V 500 7 Inch Note: Lead finish is matte tin RailClamp and RClamp are marks of Semtech Corporation Contact Information Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 2005 Semtech Corp. 7 www.semtech.com