RClamp0502A RailClamp® Low Capacitance TVS Array PROTECTION PRODUCTS - RailClamp® Description Features Transient protection for high-speed data lines to The RailClamp® series consists of ultra low capacitance TVS arrays designed to protect high speed data interfaces. This series has been specifically designed to protect sensitive components which are connected to high-speed data and transmission lines from overvoltage caused by ESD (electrostatic discharge), CDE (Cable Discharge Events), and EFT (electrical fast transients). They are designed for use in applications where board space is at a premium. Each device requires less than 2.9mm2 of PCB area and will protect two high speed data lines. The monolithic design incorporates surge rated, low capacitance steering diodes and a TVS diode in a single package. Each line has a typical capacitance of 0.9pF to ground and 0.3pF between lines. The capacitance of each line is well matched for consistant signal balance. Signal integrity is further preserved with the flow through design. A connection to the TVS is provided for protection of external voltage busses, such as those found in USB applications. This device is optimized for ESD protection of portable electronics. They may be used to meet the ESD immunity requirements of IEC 61000-4-2, Level 4 (±15kV air, ±8kV contact discharge). The RClamp0502A is in a 6-pin, RoHS/WEEE compliant, SC-89 (SOT-666) package. It measures 1.6 x 1.6 x 0.6mm. The leads are finished with lead-free matte tin. The small package makes it ideal for use in portable electronics such as cell phones, laptops, and digital still cameras. IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) Flow through design for ease of layout for high speed data line application Protects up to two I/O lines & power line Low capacitance (<0.9pF) for high-speed interfaces Ultra-small package requires less than 2.9mm2 of PCB area Low leakage current and clamping voltage Low operating voltage: 5.0V Solid-state silicon-avalanche technology Mechanical Characteristics SC-89 (SOT-666) package RoHS/WEEE Compliant Lead Finish: matte tin Molding compound flammability rating: UL 94V-0 Marking: A Packaging: Tape and Reel Applications Circuit Diagram USB 2.0 High Speed 10/100/1000 Ethernet Ports High-Definition Multimedia Interface (HDMI) Digital Visual Interface (DVI) Monitors and Flat Panel Displays Video Graphics Cards IEEE 1394 Firewire Ports High Speed Schematic & PIN Configuration Pin 5 Pin 1 & 6 Pin 3 & 4 1 6 2 5 3 4 Pin 2 SC-89 6L (Top View) Revision 06/28/2008 1 www.semtech.com RClamp0502A PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbol Value Units Peak Pulse Power (tp = 8/20μs) Pp k 50 Watts Peak Pulse Current (tp = 8/20μs) IP P 3 A ESD p er IEC 61000-4-2 (Air) 1 ESD p er IEC 61000-4-2 (Contact) VESD ±20 ±15 kV TJ -55 to +125 °C TSTG -55 to +150 °C Op erating Temp erature Storage Temp erature Note 1: Between any I/O and GND Electrical Characteristics (T=25oC) Parameter Symbol Conditions Reverse Stand-Of f Voltage VRWM Between I/O lines to Gnd or I/O to I/O Reverse Breakdown Voltage VBR It = 1mA Between I/O lines to Gnd Reverse Leakage Current IR VRWM = 5V, T=25°C Between I/O lines to Gnd or I/O to I/O 1 μA Clamping Voltage VC IPP = 1A, tp = 8/20μs Between I/O lines to Gnd 14 V Clamping Voltage VC IPP = 3A, tp = 8/20μs Between I/O to Gnd 16 V Clamping Voltage VC IPP = 3A, tp = 8/20μs Between I/O to I/O 18 V Junction Capacitance Cj VR = 0V, f = 1MHz Between I/O to Gnd 0.9 pF Junction Capacitance Cj VR = 0V, f = 1MHz Between I/O to I/O 0.7 pF © 2008 Semtech Corp. 2 Minimum Typical Maximum Units 5 V 6 V 0.3 www.semtech.com RClamp0502A PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 10 110 90 % of Rated Power or IPP Peak Pulse Power - PPP (kW) 100 1 0.1 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) Clamping Voltage vs. Peak Pulse Current I/O to Gnd - Pin 1, 3, 4, 6 to Pin 2 Clamping Voltage vs. Peak Pulse Current I/O to I/O 20 16 Clamping Voltage - VC (V) Clamping Voltage - VC (V) 14 12 10 8 6 Waveform Parameters: tr = 8µs td = 20µs 4 2 10 Waveform Parameters: tr = 8µs td = 20µs 5 0 0 0 1 2 Peak Pulse Current - IPP (A) 3 0 4 1 2 3 4 Peak Pulse Current - Ipp (A) Normalized Capacitance vs. Reverse Voltage I/O to Gnd - Pin 1, 3, 4, or 6 to Pin 2 Normalized Capacitance vs. Reverse Voltage I/O to I/O 1.2 1.4 f = 1 MHz 1.2 Normalized Capacitance - Cj NormalizedCapacitance - Cj 15 1 0.8 0.6 0.4 1 0.8 0.6 0.4 0.2 f = 1 MHz 0.2 0 0 1 © 2008 Semtech Corp. 2 3 Reverse Voltage - VR (V) 4 0 5 3 1 2 3 Reverse Voltage - VR (V) 4 5 www.semtech.com RClamp0502A PROTECTION PRODUCTS Typical Characteristics Insertion Loss S21 (I/O to I/O) CH1 S21 LOG Insertion Loss S21 (I/O to Gnd) 6 dB / REF 0 dB CH1 S21 3 6 dB / REF 0 dB 1: .00460 dB 900 MHz 2: .07870 dB 1.8 GHz 2: .02010 dB 1.8 GHz 3: .28040 dB 2.5 GHz 3 0 dB 3: -.08180 dB 2.5 GHz 0 dB 1 2 1 -6 dB -6 dB -12 dB -12 dB -18 dB -18 dB -24 dB -24 dB -30 dB -30 dB -36 dB LOG 1: .03430 dB 900 MHz 1 MHz 10 MHz 100 MHz START . 030 MHz -36 dB 3 1 GHz GHz STOP 3000. 000000 MHz 10 MHz 100 MHz START . 030 MHz ESD Response (4kV Contact per IEC 61000-4-2) 3 1 GHz GHz STOP 3000. 000000 MHz ESD Response (8kV Contact per IEC 61000-4-2) Note: Data is taken with a 10x attenuator © 2008 Semtech Corp. 1 MHz 2 Note: Data is taken with a 10x attenuator 4 www.semtech.com RClamp0502A PROTECTION PRODUCTS Applications Information Figure 1. Protection of Two Data Lines and One Power Supply Line Device Connection Options for Protection of Two High-Speed Data Lines This device is designed to protect data lines by clamping them to a fixed reference. When the voltage on the protected line exceeds the reference voltage the steering diodes are forward biased, conducting the transient current away from the sensitive circuitry. Data lines are connected at pins 1 & 6 and pins 3 & 4. Pins 5 and 2 can be connected to ground or Vcc based on application and location of those connections. The connection to ground should be made directly to a ground plane. The path length should also be kept as short as possible to minimize parasitic inductance. Figure 1 shows the layout configuration to send data input at pins 6 and 4 and output at pins 1 and 3. Figure 2. Flow Through Layout for Two Data Lines and one Power Line This device is designed for ease of PCB layout by allowing the traces run straight through the device. Figure 2 shows the proper way to design the PCB board trace in order to use the flow through layout for two line pairs. The solid line represents the PCB trace. Note the PCB traces are used to connect the pin pairs for each I/O (pin 1 to pin 6 and pins 3 to pin 4). For example, I/O 1 enters at pin 6 and exits at pin 1 and the PCB trace connects pins 6 and 1 together. This is also true for I/O 2. The negative reference (Gnd) is connected at pin 2. The positive reference is connected at pin 5. Figure 3. USB 2.0 (up to 480Mbps) Upstream or Downstream Port Protection D+ to protected Circuit Gnd Universal Serial Bus ESD Protection Dto protected Circuit The RClamp0502A may also be used to protect both upstream and downstream USB ports on monitors, computers, peripherals or portable systems. Each device will protect up to one USB port (Figure 3). 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 1 6 D+ 2 5 Vcc 3 4 D- www.semtech.com RClamp0502A PROTECTION PRODUCTS Applications Information - Spice Model RClamp0502A Spice Model Table 1 - R Clamp0502A Spice Parameters © 2008 Semtech Corp. Parameter Unit D1 (LCR D) D2 (LCR D) D3 (T VS) IS Amp 1E-20 1E-20 2.43E-13 BV Volt 110 20 8 VJ Volt 0.67 0.67 0.64 RS Ohm 0.339 0.568 1.24 IB V Amp 1E-3 1E-3 1E-3 CJO Farad 0.7E-12 0.7E-12 83E-12 TT sec 2.541E-9 2.541E-9 2.541E-9 M -- 0.01 0.01 0.222 N -- 1.1 1.1 1.1 EG eV 1.11 1.11 1.11 6 www.semtech.com RClamp0502A PROTECTION PRODUCTS Outline Drawing - SC-89 (SOT-666) D A D N E/2 E1 E L 2 1 e c Nxb B aaa C A-B D A DIM A b c D E E1 e L L1 N aaa C L1 DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX .019 .024 .005 .012 .003 .007 .059 .063 .067 .061 .063 .067 .043 .047 .049 .020 BSC .003 .008 .012 .003 .006 .008 6 .004 0.50 0.60 0.15 0.30 0.10 0.18 1.50 1.60 1.70 1.55 1.60 1.70 1.10 1.20 1.25 0.50 BSC 0.10 0.20 0.30 0.10 0.15 0.20 6 0.10 NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. Land Pattern - SC-89 (SOT-666) X Y Z C DIM C P G X Y Z G Y DIMENSIONS INCHES MILLIMETERS (.057) .020 .024 .012 .033 .090 (1.45) 0.50 0.60 0.30 0.85 2.30 P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. © 2008 Semtech Corp. 7 www.semtech.com RClamp0502A PROTECTION PRODUCTS Marking Ordering Information A Part Number Lead Finish Qty per Reel Reel Size RClamp 0502A.TCT Pb Free 3,000 7 Inch RailClamp and RClamp are registered marks of Semtech Corporation Tape and Reel Specification A A A Tape Specification and Device Orientation Contact Information Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 © 2008 Semtech Corp. 8 www.semtech.com