RClamp0584J Ultra Low Capacitance TVS Array PROTECTION PRODUCTS - RailClamp® Description PRELIMINARY Features RailClamp TVS arrays are ultra low capacitance ESD protection devices 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). The RClamp®0584J has a typical capacitance of only 0.25pF between I/O pins. This allows it to be used on circuits operating in excess of 3GHz without signal attenuation. It may be used to meet the ESD immunity requirements of IEC 61000-4-2. Each device is designed to protect four lines (two differential pairs). The RClamp0584J is in a 10-pin SLP2710P8 package. It measures 2.7 x 1.0 with a nominal height of 0.5mm. The leads are spaced at a pitch of 0.5mm and are finished with lead-free NiPdAu. It is designed for easy PCB layout by allowing the traces to run straight through the device. The combination of small size, low capacitance, and high level of ESD protection makes this device a flexible solution for applications such as HDMI, DisplayPortTM, MDDI, and eSATA interfaces. ® ESD protection for high-speed data lines to IEC 61000-4-2 (ESD) ±18kV (air), ±12kV (contact) IEC 61000-4-5 (Lightning) 5A (8/20μs) IEC 61000-4-4 (EFT) 40A (5/50ns) Package design optimized for high speed lines Flow-Through design Protects four I/O lines Low capacitance: 0.25pF typical (I/O to I/O) Low clamping voltage Low operating voltage: 5V Solid-state silicon-avalanche technology Mechanical Characteristics SLP2710P8 10-pin package (2.7 x 1.0 x 0.5mm) Pb-Free, Halogen Free, RoHS/WEEE Compliant Lead Pitch: 0.5mm Lead finish: NiPdAu Marking: Marking Code Packaging: Tape and Reel Applications Dimensions HDMI 1.3 and HDMI 1.4 USB 3.0 Digital Visual Interface (DVI) DisplayPortTM Interface LVDS Interfaces PCI Express eSATA Interfaces Circuit Diagram 2.70 0.40 1 2 1.00 Pin 1 0.60 Pin 2 Pin 4 Pin 5 0.20 0.50 3, 8 0.50 Nominal Dimensions in mm Revision 5/3/2011 4-Line Protection 1 www.semtech.com RClamp0584J PRELIMINARY PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbol Value Units Peak Pulse Power (tp = 8/20μs) Pp k 75 Watts Peak Pulse Current (tp = 8/20μs) IP P 5 A ESD p er IEC 61000-4-2 (Air) ESD p er IEC 61000-4-2 (Contact) VESD +/- 18 +/- 12 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 Reverse Stand-Off Voltage VRWM Any I/O to GN D Reverse Breakdown Voltage V BR It = 1mA, Any I/O to GN D Reverse Leakage Current IR VRWM = 5.0V, Any I/O to GN D Clamp ing Voltage VC Clamp ing Voltage Junction Cap acitance © 2011 Semtech Corp. Maximum Units 5 V 8 11 V 0.005 0.100 μA IPP = 1A, tp = 8/20μs Any I/O to GN D 12 V VC IPP = 5A, tp = 8/20μs Any I/O to GN D 15 V Cj VR = 0V, f = 1MHz, Any I/O to GN D 0.45 0.60 pF VR = 0V, f = 1MHz, Between I/O p ins 0.25 0.4 pF 2 Minimum 6.5 Typical www.semtech.com RClamp0584J PRELIMINARY 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 0.1 90 80 70 60 50 40 30 20 10 0 0.01 0.1 1 10 0 100 25 50 75 100 125 150 Ambient Temperature - TA (oC) Pulse Duration - tp (us) Pulse Waveform Clamping Voltage vs. Peak Pulse Current (Between any I/O and Ground) 110 Waveform Parameters: tr = 8µs td = 20µs 90 80 Percent of I PP 70 20 18 Clamping Voltage -VC (V) 100 e-t 60 50 40 td = IPP/2 30 20 10 16 14 12 10 8 6 Waveform Parameters: tr = 8µs td = 20µs 4 2 0 0 0 5 10 15 20 25 0 30 1 2 3 4 5 6 Peak Pulse Current - IPP (A) Time (µs) ESD Clamping (Pin 1, 2, 3, or 4 to GND) (+8kV Contact per IEC 61000-4-2) Normalized Capacitance vs. Reverse Voltage 2 f = 1MHz 1.8 1.6 CJ(VR) / CJ(VR=0) 1.4 1.2 1 0.8 0.6 0.4 0.2 0 0 1 2 3 Reverse Voltage - VR (V) 4 5 Note: Data is taken with a 10x attenuator © 2011 Semtech Corp. 3 www.semtech.com RClamp0584J PRELIMINARY PROTECTION PRODUCTS Typical Characteristics (Con’t) Insertion Loss S21 - I/O to I/O © 2011 Semtech Corp. Insertion Loss S21 - I/O to GND 4 www.semtech.com RClamp0584J PRELIMINARY PROTECTION PRODUCTS Applications Information Design Recommendations for HDMI Protection Adding external ESD protection to HDMI ports can be challenging. First, ESD protection devices have an inherent junction capacitance. Furthermore, adding even a small amount of capacitance will cause the impedance of the differential pair to drop. Second, large packages and land pattern requirements cause discontinuities that adversely affect signal integrity. The RClamp0584J is specifically designed for protection of high-speed interfaces such as HDMI. They present <0.3pF capacitance between the pairs while being rated to handle >±8kV ESD contact discharges (>±15kV air discharge) as outlined in IEC 61000-4-2. Each device is in a leadless SLP package that is less than 1.1mm wide. They are designed such that the traces flow straight through the device. The narrow package and flow-through design reduces discontinuities and minimizes impact on signal integrity. This becomes even more critical as signal speeds increase. 10 9 GND 7 6 1 2 GND 4 5 Pin Identification 1, 2, 4, 5 Input Lines 6, 7, 9, 10 Output Lines (No Internal Connection) 3, 8 Ground Figure 1 - SLP2710P8 Pin Configuration (Top View) Pin Configuration Figure 1 is an example of how to route the high speed differential traces through the RClamp0584J. The PCB traces are used to connect the pin pairs for each line (pin 1 to pin 10, pin 2 to pin 9, pin 4 to pin 7, pin 5 to pin 6). For example, line 1 enters at pin 1 and exits at Pin 10 and the PCB trace connects pin 1 and 10 together. This is true for lines connected at pins 2, 4, and 5 also. Ground is connected at pins 3 and 8. One large ground pad should be used in lieu of two separate pads. TDR Measurements for HDMI The combination of low capacitance, small package, and flow-through design means it is possible to use these devices to meet the HDMI impedance requirements of 100 Ohms ±15% without any PCB board modification. Figure 3 shows a typical impedance test result for a TDR risetime of 200ps using a Semtech evaluation board with 100 Ohm traces throughout. Measurements were taken using a TDR method as outlined in the HDMI Compliance Test Specification (CTS). As shown, the device meets the HDMI CTS requirement of 100 Ohm ±15% with plenty of margin. © 2011 Semtech Corp. Figure 2 - Flow through Layout Using RClamp0584J 5 www.semtech.com RClamp0584J PRELIMINARY PROTECTION PRODUCTS Applications Information Figure 3 shows a typical HDMI 1.3 eye pattern at 1080p resolution. As shown there are no violations of the eye pattern with RClamp0584J in the circuit. The RClamp0506T can be used to protect the remaining lines (I2C, CEC, hot plug, etc.). Layout Guidelines for Optimum ESD Protection Good circuit board layout is critical not only for signal integrity, but also for effective suppression of ESD induced transients. For optimum ESD protection, the following guidelines are recommended: z Place the device as close to the connector as possible. This practice restricts ESD coupling into adjacent traces and reduces parasitic inductance. z The ESD transient return path to ground should be kept as short as possible. Whenever possible, use multiple micro vias connected directly from the device ground pad to the ground plane. z Avoid running critical signals near board edges. X-axis Y-axis 1.79 98.3 (nsec) (Ohm) Figure 2 - TDR Measurement with 200ps risetime using Semtech Evaluation Board Figure 3 - Typical HDMI 1.3 Eye Pattern (1080p) with RClamp0584J © 2011 Semtech Corp. 6 www.semtech.com RClamp0584J PRELIMINARY PROTECTION PRODUCTS Outline Drawing - SO-8 Outline SLP2710P8 A D DIMENSIONS MILLIMETERS MIN NOM MAX B DIM E PIN 1 INDICATOR (LASER MARK) A SEATING PLANE aaa C A1 C b1xN bbb C A B A2 R0.125 0.47 0.50 0.53 0.00 0.03 0.05 (0.13) 0.15 0.20 0.25 0.35 0.40 0.45 2.60 2.70 2.80 0.90 1.00 1.10 0.50 BSC 0.60 BSC 0.30 0.38 0.43 8 0.08 0.10 2 1 E/2 A A1 A2 b b1 D E e e1 L N aaa bbb LxN 2X R0.075 7 PLACES N e1 bxN e NOTES: bbb C A B D/2 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). Land Pattern - SLP2710P8 P1 P DIMENSIONS DIM C G P P1 X X1 Y Y1 Z Y Z (C) (Y1) G X X1 INCHES (.034) .008 .020 .024 .008 .016 .027 (.061) .061 MILLIMETERS (0.875) 0.20 0.50 0.60 0.20 0.40 0.675 (1.55) 1.55 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. © 2011 Semtech Corp. 7 www.semtech.com RClamp0584J PRELIMINARY PROTECTION PRODUCTS Marking Codes Ordering Information 0584J PIN 1 INDICATOR YYWW Part Number Number of Lines Qty per Reel Reel Size RClamp0584J.TCT 4 3000 7 Inch RailClamp and RClamp are trademarks of Semtech Corporation. YYWW = Date Code Tape and Reel Specification Pin 1 Location User Direction of feed Device Orientation in Tape Part Number RClamp 0584J A0 1.21 +/-0.10 mm Tape Width B, (Max) D 8 mm 4.2 mm 1.5 + 0.1 mm - 0.0 mm ) B0 K0 2.91 +/-0.10 mm D1 E 0.5 mm ±0.05 1.750±.10 mm 0.66 +/-0.10 mm F K (MAX) P P0 P2 T(MAX) 3.5±0.05 mm 2.4 mm 4.0±0.1 mm 4.0±0.1 mm 2.0±0.05 mm 0.4 mm W 8.0 mm + 0.3 mm - 0.1 mm Contact Information Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 © 2011 Semtech Corp. 8 www.semtech.com