RClamp0512TQ Low Capacitance RailClamp® 2-Line Surge and ESD Protection PROTECTION PRODUCTS Description Features RClamp®0512TQ is specifically designed to provide secondary surge and ESD protection on high-speed ports. RClamp0512TQ integrates low capacitance, surge-rated steering diodes with a high power transient voltage suppressor (TVS). The TVS utilizes snap-back or “crow-bar” technology to minimize device clamping voltage and features high surge current capability of 20A (tp=8/20us). ESD characteristics are highlighted by high ESD withstand voltage (+/-30kV per IEC 61000-4-2) and extremely low dynamic resistance (0.075 Ohms typical). Each device will protect two lines operating at 5 volts and are qualified to AEC-Q100, Grade 1 (-40 to +125 oC) for automotive applications. • Transient Protection to IEC 61000-4-2 (ESD) 30kV (Air), 30kV (Contact) IEC 61000-4-4 (EFT) 4kV (5/50ns) IEC 61000-4-5 (Lightning) 20A (8/20µs) ISO-10605 (ESD) 30kV (Air), 30kV (Contact) • Qualified to AEC-Q100, Grade 1 • Very Small PCB Area: 0.6mm2 • Protects Two High-Speed Data Lines • Working Voltage: 5V • Low Capacitance: 3pF Maximum • Dynamic Resistance: 0.075 Ohms (Typ) • Solid-State Silicon-Avalanche Technology RClamp0512TQ is in a 3-pin SGP1006N3T package. It measures 1.0 x 0.6 mm with a nominal height of only 0.4mm. The leads are finished with lead-free NiAu. The flow- through package design simplifies PCB layout. Mechanical Characteristics • • • • • • • SGP1006N3T Package Pb-Free, Halogen Free, RoHS/WEEE Compliant Nominal Dimensions: 1.0 x 0.60 x 0.40 mm Lead Finish: NiAu Molding Compound Flammability Rating: UL 94V-0 Marking : Marking Code + Dot Matrix Date Code Packaging : Tape and Reel Applications • • • • • • Nominal Dimensions Automotive Applications Industrial Equipment Integrated Magnetics / RJ-45 Connectors 10/100/1000 Ethernet 2.5GbE USB 2.0 Functional Schematic 1.00 0.70 1 2 1 0.60 0.40 3 Nominal Dimensions in mm RClamp0512TQ Final Datasheet December 17, 2015 2 Rev 6 Device Schematic www.semtech.com Page 1 Semtech Absolute Maximum Ratings Rating Symbol Value Units Peak Pulse Power (tp = 1.2/50µs) PPK 170 W Peak Pulse Current (tp = 1.2/50µs) IPP 20 A ESD per IEC 61000-4-2 (Contact) ESD per IEC 61000-4-2 (Air)(1) VESD ±30 ±30 kV ESD per ISO-10605 (Contact)(2) ESD per ISO-10605 (Air)(2) VESD ±30 ±30 kV Operating Temperature TJ -40 to +125 O Storage Temperature TSTG -55 to +150 O (1) C C Electrical Characteristics (T=25OC unless otherwise specified) Parameter Symbol Conditions Reverse Stand-Off Voltage VRWM Reverse Breakdown Voltage VBR Holding Current IH Min. Typ. -40OC to 125OC Between any two pins It = 10mA, Pin 1 or 2 to Pin 3 Units 5 V -40OC to 125OC 6.5 9.5 11.5 V T = 25OC 75 150 250 mA T = 25 C 0.01 0.100 μA T = 125 C 0.03 0.250 μA 8.5 V O Reverse Leakage Current IR Clamping Voltage(3) VC IPP = 20A, tp = 1.2/50µs, Pin 1 or 2 to Pin 3 5 ESD Clamping Voltage(4) VC IPP = 4A, tp = 0.2/100ns (TLP) Pin 1 or 2 to Pin 3 4.3 V ESD Clamping Voltage(4) VC IPP = 16A, tp = 0.2/100ns (TLP) Pin 1 or 2 to Pin 3 5.2 V Dynamic Resistance(4), (5) RDYN tp = 0.2/100ns (TLP) Pin 1 or 2 to Pin 3 0.075 Ohms Junction Capacitance CJ VRWM = 5V Max. O VR = 0V, f = 1MHz Pin 1 or 2 to Pin 3 T = 25OC 2 3 pF VR = 0V, f = 1MHz Pin 1 to Pin 2 T = 25OC 1.1 2 pF Notes: (1): ESD Gun return path to Ground Reference Plane (GRP) (2): ESD Gun return path to Horizontal Coupling Plane (HCP); Test conditions: a)150pF/330pF, 330W b) 150pF/330pF, 2kW (3): Measured using a 1.2/50us voltage, 8/20us current combination waveform, RS = 8 Ohms. Clamping is defined as the peak voltage across the device after the device snaps back to a conducting state. (4): Transmission Line Pulse Test (TLP) Settings: tp = 100ns, tr = 0.2ns, ITLP and V TLP averaging window: t1 = 70ns to t2 = 90ns. (5): Dynamic resistance calculated from ITLP = 4A to ITLP = 16A RClamp0512TQ Final Datasheet December 17, 2015 Rev 6.0 www.semtech.com Page 2 Semtech Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 10 120 100 1 % of Rated Power or IPP Peak Pulse Power ‐ PPP (kW) TA = 25OC 0.1 80 60 40 20 DR040512:25:125:150 DR040412‐170 0.01 0.1 1 10 Pulse Duration ‐ tp (µs) 100 0 1000 0 25 Clamping Characteristic (20A, 1.2/50us Pulse) 125 150 TLP IV Curve (Positive Pulse) 30 15 Waveform Parameters: 1.2/50µs (Voltage) / 8/20µS (Current) combination waveform with 8Ω source impedance. Injected current = 20A Pin 1 or Pin 2 to Pin 3 20 TA = 25OC 10 Transmission Line Pulse Test (TLP) Settings: tp = 100ns, tr = 0.2ns, ITLP and VTLP averaging window: t1 = 70ns to t2 = 90ns Pin 1 or Pin 2 to Pin 3 25 TLP Current (A) Clamping Votlage (V) 50 75 100 Ambient Temperature ‐ TA (OC) 5 15 10 5 0 0 -10 0 10 20 30 40 -5 50 0 2 4 Time (us) ESD Clamping (+8kV Contact per IEC 61000-4-2) 60 Clamping Voltage - VC (V) Clamping Voltage - VC (V) 20 -10 -15 -20 Measured with 50 Ohm scope input impedance, 2GHz bandwidth. Corrected for 50 Ohm, 26dB attenuator. ESD gun return path connected to ESD ground plane. -25 10 -30 0 10 20 30 40 50 60 70 80 -10 Time (ns) RClamp0512TQ Final Datasheet December 17, 2015 Rev 6.0 12 -5 30 -10 10 0 40 0 8 ESD Clamping (-8kV Contact per IEC 61000-4-2) Measured with 50 Ohm scope input impedance, 2GHz bandwidth. Corrected for 50 Ohm, 26dB attenuator. ESD gun return path connected to ESD ground plane. 50 6 Clamping Voltage (V) www.semtech.com 0 10 20 30 40 Time (ns) 50 60 70 80 Page 3 Semtech Typical Characteristics ESD Clamping (+15kV Contact per ISO-10605 150pF, 330W) 70 50 5 0 Clamping Voltage - VC (V) Clamping Voltage - VC (V) 10 150pF and 330 Ohm with 50 Ohm scope input impedance, 2GHz bandwidth. Corrected for 50 Ohm, 26dB attenuator. ESD gun return path connected to horizontal coupling plane. 60 ESD Clamping (-15kV Contact per ISO-10605 150pF, 330W) 40 30 20 10 0 -10 -5 -10 -15 -20 -25 -35 -10 0 10 20 30 40 50 60 70 -40 80 Time (ns) ESD Clamping (+15kV Contact per ISO-10605 330pF, 330W) 70 0 10 20 30 20 10 0 10 20 30 40 50 60 70 -30 330pF and 330 Ohm with 50 Ohm scope input impedance, 2GHz bandwidth. Corrected for 50 Ohm, 26dB attenuator. ESD gun return path connected to horizontal coupling plane. -10 0 10 20 20 10 20 30 40 50 60 70 -20 -30 330pF and 2k Ohm with 50 Ohm scope input impedance, 2GHz bandwidth. Corrected for 50 Ohm, 26dB attenuator. ESD gun return path connected to horizontal coupling plane. 80 -10 Time (ns) RClamp0512TQ Final Datasheet December 17, 2015 Rev 6.0 80 -10 -50 10 70 0 -40 0 0 60 ESD Clamping (+15kV Contact per ISO-10605 330pF, 2kW) Clamping Voltage - VC (V) Clamping Voltage - VC (V) 30 -10 50 10 40 -10 30 40 Time (ns) 20 330pF and 2k Ohm with 50 Ohm scope input impedance, 2GHz bandwidth. Corrected for 50 Ohm, 26dB attenuator. ESD gun return path connected to horizontal coupling plane. 50 80 -20 -50 80 ESD Clamping (+15kV Contact per ISO-10605 330pF, 2kW) 60 70 -10 Time (ns) 70 60 0 -40 0 50 10 40 -10 30 40 Time (ns) ESD Clamping (-15kV Contact per ISO-10605 330pF, 330W) Clamping Voltage - VC (V) Clamping Voltage - VC (V) 50 -10 20 330pF and 330 Ohm with 50 Ohm scope input impedance, 2GHz bandwidth. Corrected for 50 Ohm, 26dB attenuator. ESD gun return path connected to horizontal coupling plane. 60 -10 150pF and 330 Ohm with 50 Ohm scope input impedance, 2GHz bandwidth. Corrected for 50 Ohm, 26dB attenuator. ESD gun return path connected to horizontal coupling plane. -30 www.semtech.com 0 10 20 30 40 Time (ns) 50 60 70 80 Page 4 Semtech Typical Characteristics (Continued) Capacitance vs. Temperature 3 6 2.5 5 2 Junction Capacitancs - CJ (pF) Junction Capacitance - CJ (pF) Capacitance vs. Reverse Voltage Pin 1 to 3 Pin 2 to 3 1.5 Pin 1 to 2 1 0.5 0 f = 1 MHz 0 1 2 3 4 5 4 3 2 VR = 0V VR = 5V 1 0 6 f = 1MHz Pin 1 or 2 to Pin 3 Voltage (V) -50 Insertion Loss - S21 0 25 50 75 Temperature (°C) 100 125 150 Analog Crosstalk 0 0 Pin 1 to 2 Pin 1 to 3 Pin 2 to 3 -10 -20 ‐1 Crosstalk- CT (dB) Insertion Loss ‐ IL (dB) -25 -30 -40 -50 ‐2 -60 -70 -80 ‐3 1 10 100 Frequency (MHz) 1000 10 100 1000 Frequency (MHz) 10000 Breakdown Voltage (VBR) vs. Temperature 12 Breakdown Voltage - VBR (V) 10 8 6 4 2 IBR = 10mA 0 -50 -25 RClamp0512TQ Final Datasheet December 17, 2015 0 25 50 75 Temperature (OC) Rev 6.0 100 125 150 www.semtech.com Page 5 Semtech Application Information Device Operation Characteristic Curve This device utilizes a multi-junction structure that is designed to switch to a low voltage state when triggered by ESD, EOS, or other transient events. During normal operation, the device will present a high-impedance to the circuit for voltage up to the working voltage (VRWM) of the device. When the voltage across the device terminals exceeds the breakdown voltage (VBR), avalanche breakdown occurs in the blocking junction causing the device to “snap-back” or switch to a low impedance on-state. This has the advantage of lowering the overall clamping voltage (VC) as ESD peak pulse current (IPP) flows through the device. Once the current decreases below the holding current (IH), the device will return to a high-impedance off-state. IPP “Snap-Back” IH IR VH VC VRWM VBR Table 1 - Parameter Definition RClamp0512TQ Final Datasheet December 17, 2015 Rev 6.0 www.semtech.com Symbol Parameter VRWM Maximum Working Voltage VBR Breakdown Voltage VC Clamping Voltage IH Holding Current IR Reverse Leakage Current IPP Peak Pulse Current Page 6 Semtech Application Information Ethernet Protection Ethernet ports are exposed to external transient events in the form of ESD, EFT, lightning, and cable discharge events (CDE). Test standards that model these events include IEC 61000-4-2 for ESD, IEC 61000-4-4 for EFT, and IEC 61000-4-5 and GR-1089 for lightning. Any of these events can cause catastrophic damage to the PHY IC. When designing Ethernet protection, the entire system must be considered. Over-voltage events can be common mode (with respect to ground) or differential (line-to-line). An Ethernet port includes interface magnetics consisting of transformers integrated with common mode chokes. The transformer center taps are connected to ground via an RC network or “Bob Smith” termination. The purpose of this termination is to reduce common mode emissions. The transformer provides common mode isolation to transient events, but no protection for differential surges. During a differential transient event, current will flow through the transformer, charging the windings on the line side. Energy is transferred to the secondary until the surge subsides or the transformer saturates. A typical protection scheme which utilizes the RClamp0512TQ is shown in Figure 1. The devices are located on the PHY side of the transformer with one device placed across each line pair. Parasitic inductance in the protection path should be minimized by locating RClamp0512TQ as physically close to the magnetics as possible, and preferably on the same side of the PCB. Reducing parasitic inductance is especially important for suppressing fast rise time transients such as ESD and EFT. Inductance in the path of the protection device increases the peak clamping voltage seen by the protected device (V = L di/dt). For example, 1nH of inductance can increase the peak clamping voltage by 30V for a 30A (8kV) ESD pulse with a 1ns rise time. Differential pairs are routed through each RClamp0512TQ at pins 1 and 2. Pin 3 of the device is not connected. Placing the protection on the PHY side of the magnetics is advantageous in that the magnitude and duration of the surge is attenuated by the transformer windings. The amount of attenuation will vary by vendor and configuration of the magnetics. The Ethernet transformer has to be able to support the impulse tests without failure. A typical Ethernet transformer can withstand a few hundred amperes (tp=8/20us) before failure occurs, but this needs to be verified by testing. Alternatively, the protection can be placed on the line side of the transformer. However, the additional protection afforded by the transformer is lost, and the ability of the system to withstand high energy surges is limited to the capability of the protection device. 1 1 3 2 1 3 2 3 4 2 RJ-45 Ethernet PHY 1GbE / 2.5GbE RClamp0512TQ RClamp0512TQ 1 3 2 RClamp0512TQ 1 5 6 7 3 2 RClamp0512TQ 8 Figure 1 - 1GbE / 2.5GbE Protection Circuit RClamp0512TQ Final Datasheet December 17, 2015 Rev 6.0 www.semtech.com Page 7 Semtech Application Information USB Interface Protection RClamp0512TQ may be used to protect D+ and D- lines in USB 2.0, USB 3.0, and USB 3.1 applications. In each case, USB D+ and D- pins are routed through RClamp0512TQ at pin1 and pin 2. Pin 3 is connected to the ground plane. Figures 2 and 3 below are examples of protecting USB 3.0 and 3.1 Type-A interfaces (host side shown). For USB 3.0 applications, RClamp3324T is recommended for protecting the 5Gb/s SuperSpeed line pairs. Lines are routed through the device at pins 1-4. Traces should be kept the same length to avoid impedance mismatch. Ground is connected at pins 5 and 6. The differential impedance of each pair can be controlled for USB 3.0 (85 Ohms +/-15%) while maintaining a minimum trace-totrace and trace-to-pad spacing. Individual PCB design constraints may necessitate different spacing or trace width. Both ground pads should be connected for optimal performance. Ground connection is made using filled via-in-pad. Additional information may be found on the device data sheet. For USB 3.1 applications, RClamp0561Z is recommended for protecting the 10Gb/s SuperSpeed+ line pairs. One device is connected between each line and ground. Figure 2 - USB 3.0 Type-A Protection Example RClamp0561Z has a maximum capacitance of 0.15pF allowing it to be used on transmission lines operating in excess of 10GHz. Single line devices make it easier for the designer to route the traces and maintain equal distance between the differential pairs for maximum signal integrity. Single line devices such as uClamp0571P are recommended for surge and ESD protection of the VBus line. This device features high surge and ESD capability and may be used on 5V power rails. In power delivery (PD) applications, higher working voltage TVS device may be needed. Options exist for ESD and surge protection up to 24V. Device Placement Placement of the protection component is a critical element for effective ESD suppression. TVS diodes should be placed as close to the connector as possible. This helps reduce transient coupling to nearby traces. Ground connections should be made directly to the ground plane using micro-vias. This reduces parasitic inductance in the ground path and minimizes the clamping voltage seen by the protected device. Figure 3 - USB 3.1 Type-A Protection Example USB 3.1 - Type A Host Connector USB 3.0 - Type A Host Connector RClamp0561Z RClamp0512TQ SSRX- GND GND RClamp0561Z D+ Via to Ground Landing Pad Device Outline Trace SSRX+ GND RClamp3324T SSTX- SSTX+ uClamp0571P RClamp0512TQ Final Datasheet December 17, 2015 SSRX- SSRX+ D+ RClamp0512TQ GND D- D- RClamp0561Z RClamp0561Z VBus Via to Ground Landing Pad Device Outline Trace SSTXSSTX+ VBus uClamp0571P Rev 6.0 www.semtech.com Page 8 Semtech Applications Information Assembly Guidelines Recommended Mounting Pattern The small size of this device means that some care must be taken during the mounting process to insure reliable solder joints. The figure at the right details Semtech’s recommended mounting pattern. Recommended assembly guidelines are shown in Table 2. Note that these are only recommendations and should serve only as a starting point for design since there are many factors that affect the assembly process. Exact manufacturing parameters will require some experimentation to get the desired solder application. Semtech’s recommended mounting pattern is based on the following design guidelines: Stencil Opening (0.220 x 0.480 mm) Land Pad (0.200 x 0.430 mm) Component .850 1.000 Land Pattern All Dimensions are in mm. The recommended land pattern follows IPC standards and is designed for maximum solder coverage. Detailed dimensions are shown elsewhere in this document. Table 2 - Recommended Assembly Guidelines Assembly Parameter Recommendation Solder Stencil Solder Stencil Design Laser Cut, Electro-Polished Stencil design is one of the key factors which will determine the volume of solder paste which is deposited onto the land pad. The area ratio of the stencil aperture will determine how well the stencil will print. The area ratio takes into account the aperture shape, aperture size, and stencil thickness. An area ratio of 0.70 – 0.75 is preferred for the subject package. The area ratio of a rectangular aperture is given as: Aperture Shape Rectangular Solder Stencil Thickness 0.100mm (0.004”) Solder Paste Type Type 4 size sphere or smaller Solder Reflow Profile Per JEDEC J-STD-020 PCB Solder pad Design Non-Solder Mask Defined PCB Pad Finish OSP or NiAu Area Ratio = (L * W )/ (2 * (L + W) * T) Where: L = Aperture Length W = Aperture Width T = Stencil Thickness Semtech recommends a stencil thickness of 0.100mm for this device. The stencil should be laser cut with electropolished finish. The stencil should have a positive taper of approximately 5 degrees. Electro polishing and tapering the walls results in reduced surface friction and better paste release. Due to the small aperture size, a solder paste with Type 4 or smaller particles are recommended. Assuming a 100um thick stencil, the aperture dimensions shown will yield an area ratio of approximately 0.75. RClamp0512TQ Final Datasheet December 17, 2015 Rev 6.0 www.semtech.com Page 9 Semtech Outline Drawing - SGP1006N3T D A DIMENSIONS MILLIMETERS DIM MIN NOM MAX B PIN 1 INDICATOR (LASER MARK) E A SEATING PLANE aaa C A1 C A A1 b D E e L N aaa bbb 0.35 0.00 0.15 0.95 0.55 0.40 0.45 0.015 0.05 0.20 0.25 1.00 1.075 0.60 0.675 0.70 BSC 0.20 0.25 0.30 3 0.08 0.10 e e/2 1 2 LxN (0.025-0.075) E/2 N bxN bbb D/2 C A B NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). Land Pattern - SGP1006N3T P P/2 DIMENSIONS (C) Z Y DIM C P X Y Z MILLIMETERS (0.42) 0.70 0.20 0.43 0.85 X NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. RClamp0512TQ Final Datasheet December 17, 2015 Rev 6.0 www.semtech.com Page 10 Semtech Marking Code 50 Notes: Marking will also include line matrix date code Tape and Reel Specification - Paper Tape, 2mm Pitch 50 50 50 Pin 1 Location (Towards Sprocket Holes) RClamp0512TQ Final Datasheet December 17, 2015 Rev 6.0 www.semtech.com Page 11 Semtech Tape and Reel Specification - Plastic Tape, 4mm Pitch 50 50 50 Pin 1 Location (Towards Sprocket Holes) Ordering Information Part Number RClamp0512TQTNT RClamp0512TQTCT Qty per Reel 10000 3000 Reel Size 7 Inch 7 Inch Carrier Tape Paper Plastic Pitch 2mm 4mm RailClamp and RClamp are registered trademarks of Semtech Corporation. RClamp0512TQ Final Datasheet December 17, 2015 Rev 6.0 www.semtech.com Page 12 Semtech IMPORTANT NOTICE Information relating to this product and the application or design described herein is believed to be reliable, however such information is provided as a guide only and Semtech assumes no liability for any errors in this document, or for the application or design described herein. Semtech reserves the right to make changes to the product or this document at any time without notice. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. Semtech warrants performance of its products to the specifications applicable at the time of sale, and all sales are made in accordance with Semtech’s standard terms and conditions of sale. SEMTECH PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS, OR IN NUCLEAR APPLICATIONS IN WHICH THE FAILURE COULD BE REASONABLY EXPECTED TO RESULT IN PERSONAL INJURY, LOSS OF LIFE OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. INCLUSION OF SEMTECH PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE UNDERTAKEN SOLELY AT THE CUSTOMER’S OWN RISK. Should a customer purchase or use Semtech products for any such unauthorized application, the customer shall indemnify and hold Semtech and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs damages and attorney fees which could arise. The Semtech name and logo are registered trademarks of the Semtech Corporation. All other trademarks and trade names mentioned may be marks and names of Semtech or their respective companies. Semtech reserves the right to make changes to, or discontinue any products described in this document without further notice. Semtech makes no warranty, representation or guarantee, express or implied, regarding the suitability of its products for any particular purpose. All rights reserved. © Semtech 2015 Contact Information Semtech Corporation 200 Flynn Road, Camarillo, CA 93012 Phone: (805) 498-2111, Fax: (805) 498-3804 www.semtech.com RClamp0512TQ Final Datasheet December 17, 2015 Rev 6.0 Page 13 Semtech