RClamp0508M 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 which are connected to data and transmission lines from overvoltage caused by ESD (electrostatic discharge), CDE (cable discharge events), EFT (electrical fast transients), and lightning. The unique design of these devices incorporates surge rated, low capacitance steering diodes and a TVS diode in a single package. During transient conditions, the steering diodes direct the transient to either the positive side of the power supply line or to ground. The internal TVS diode prevents over-voltage on the power line, protecting any downstream components. The RClampTM0508M has a low typical capacitance of 3pF and may be used on lines operating up to 1GHz. This makes the device ideal for protection of highspeed data lines such as USB 2.0, Firewire, DVI, and gigabit Ethernet interfaces. The low capacitance array configuration allows the user to protect eight high-speed data or transmission lines. The low inductance construction minimizes voltage overshoot during high current surges. They may be used to meet the ESD immunity requirements of IEC 61000-4-2, Level 4 (15kV air, 8kV contact discharge). ESD protection for high-speed data lines to Mechanical Characteristics 4 USB 2.0 Power & Data Line Protection Video Graphics Cards Monitors and Flat Panel Displays Digital Video Interface (DVI) High Definition Multi-Media Interface (HDMI) 10/100/1000 Ethernet ATM Interfaces IEEE 1394 Firewire Ports PIN Configuration 3 2 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 Applications Circuit Diagram 1 IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 12A (8/20µs) Array of surge rated diodes with internal TVS Small package saves board space Protects eight I/O lines operating up to 1GHz Low capacitance: 3pF typical Low clamping voltage Low operating voltage: 5.0V Solid-state silicon-avalanche technology 5 7 8 9 10 Line 1 1 Line 8 Line 2 Line 7 Vcc Line 6 Line 3 Line 5 Line 4 GND 6 MSOP-10L (Top View) Revision 01/18/2008 1 www.semtech.com RClamp0508M PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbol Value Units Peak Pulse Power (tp = 8/20µs) Pp k 300 Watts Peak Pulse Current (tp = 8/20µs) IP P 12 A ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact) VESD 15 8 kV Lead Soldering Temperature TL 260 (10 sec.) °C Operating Temperature TJ -55 to +125 °C TSTG -55 to +150 °C Storage Temperature Electrical Characteristics (T=25oC) Parameter Symbol Conditions Reverse Stand-Off Voltage VRWM Pi n 3 to 6 Reverse Breakdown Voltage V BR It = 1mA Pi n 3 to 6 Reverse Leakage Current IR VRWM = 5V, T=25°C Pi n 3 to 6 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 12.5 V Clamp ing Voltage VC IPP = 5A, tp = 8/20µs Any I/O p in to Ground 17.5 V Clamp ing Voltage VC IPP = 12A, tp = 8/20µs Any I/O p in to Ground 25 V Junction Cap acitance Cj VR = 0V, f = 1MHz Any I/O p in to Ground 3 5 pF VR = 0V, f = 1MHz Between I/O p ins 1.5 2008 Semtech Corp. 2 Minimum Typical Maximum Units 5 V 6 V pF www.semtech.com RClamp0508M PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 10 100 % of Rated Power or IPP Peak Pulse Power - PPP (kW) 110 1 0.1 90 80 70 60 50 40 30 20 10 0 0.01 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 PP 80 70 Clamping Voltage -Vc (V) 90 Percent of I 30.00 Waveform Parameters: tr = 8µs td = 20µs 100 e-t 60 50 40 td = IPP/2 30 20 25.00 20.00 15.00 10.00 Waveform Parameters: tr = 8µs td = 20µs 5.00 10 0 0 5 10 15 20 25 0.00 0.00 30 2.00 Time (µs) 4.00 6.00 8.00 10.00 12.00 Peak Pulse Current - Ipp (A) Normalized Capacitance vs. Reverse Voltage Forward Voltage vs. Forward Current 2 1.8 1.6 6.00 CJ(VR) / C J(V R=0) Forward Voltage -VF (V) 7.00 5.00 4.00 3.00 Waveform Parameters: tr = 8µs td = 20µs 2.00 1.00 0.00 0.00 1.4 1.2 1 0.8 0.6 0.4 0.2 f = 1 MHz 0 2.00 4.00 6.00 8.00 10.00 0 12.00 2 3 4 5 Reverse Voltage - VR (V) Forward Current - IF (A) 2008 Semtech Corp. 1 3 www.semtech.com RClamp0508M PROTECTION PRODUCTS Typical Characteristics (Con’t) Insertion Loss S21 CH1 S21 LOG START 3 dB/ .030 000 MHz 2008 Semtech Corp. Analog Cross Talk REF 0 dB CH1 STOP 3 000. 000 000 MHz S21 LOG START 4 20 dB/ .030 000 MHz REF 0 dB STOP 3 000. 000 000 MHz www.semtech.com RClamp0508M PROTECTION PRODUCTS Applications Information Schematic Device Connection Options for Protection of Eight High-Speed Data Lines 3 This device is designed to protect eight 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 lines are connected at pins 1, 2, 4, 5, 7, 8, 9, and 10. The negative reference is connected at pin 6. This pin 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 pin 3. The options for connecting the positive reference are as follows: 1 2 4 5 7 8 9 10 6 Pin Configuration 1. To protect data lines and the power line, connect pin 3 directly to the positive supply rail (VCC). In this configuration the data lines are referenced to the supply voltage. The internal TVS diode prevents over-voltage on the supply rail. 2. In applications where the supply rail does not exit the system, the internal TVS may be used as the reference. In this case, pin 3 is not connected. 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). Line 1 1 Line 8 Line 2 Line 7 Vcc Line 6 Line 3 Line 5 Line 4 GND Universal Serial Bus ESD Protection The RClamp0508M may be used to protect USB 2.0 ports on monitors, computers, peripherals or portable systems. Each device will protect up to four USB ports. When the voltage on the data lines exceed the bus voltage (plus one diode drop), the internal rectifiers are forward biased conducting the transient current away from the protected controller chip. The TVS diode directs the surge to ground. The TVS diode also acts to suppress ESD strikes directly on the voltage bus. Thus, both power and data pins are protected with a single device. 2008 Semtech Corp. 5 www.semtech.com RClamp0508M PROTECTION PRODUCTS Applications Information RailTo-Rail Pr o t ection Using Rail-T Pro RailClam p T V S Arra ys RailClamp Arrays ESD Protection With RailClamps RailClamps are optimized for ESD protection using the rail-to-rail topology. They are designed to overcome the inherent disadvantages of using discrete signal diodes for ESD suppression. The RailClamp’s integrated TVS diode helps to mitigate the effects of parasitic inductance in the power supply connection. During an ESD event, the current will be directed through the integrated TVS diode to ground. The maximum voltage seen by the protected IC due to this path will be the clamping voltage of the device. The line loading capacitance is minimized by using low capacitance steering diodes. The steering diodes are scaled to handle high current ESD events without damage or degradation. The end result is a highly reliable, integrated solution that eliminates the guess work associated with using discrete components. 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. 2008 Semtech Corp. 6 www.semtech.com RClamp0508M PROTECTION PRODUCTS Applications Information - SPICE Model 1.0 nH I/O Line nH RClamp0508M Spice Model R Clamp0508M Spice Parameters 2008 Semtech Corp. Parameter Unit D1 (LCR D) D2 (LCR D) D3 (T VS) IS A mp 10E-14 10E-14 10E-14 BV Volt 180 20 8.59 VJ Volt 0.62 0.59 0.6 RS Ohm 0.31 0.37 0.500 IB V Amp 1E-3 1E-3 1E-3 CJO Farad 3E-12 1E-12 360E-12 TT sec 2.541E-9 2.541E-9 2.541E-9 M -- 0.01 0.01 0.334 N -- 1.1 1.1 1.1 EG eV 1.11 1.11 1.11 7 www.semtech.com RClamp0508M 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. 2008 Semtech Corp. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 8 www.semtech.com RClamp0508M PROTECTION PRODUCTS Marking Codes 508M XXXX * XXXX = Date Code ** Dot indicates Pin 1 Ordering Information Part Number Working Voltage Qty per Reel R eel Size RClamp 0508M.TBT 5V 500 7 Inch Note: Lead finish is lead free 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 2008 Semtech Corp. 9 www.semtech.com