RLST236A054LV

RLST236A054LV Series ULTRA LOW CAPACITANCE TVS/ESD ARRAY Description Features RLST236A054LV are surge rated diode arrays designed to protect high speed data interfaces. The LV series has been specifically designed to protect sensitive components which are connected to data and transmission lines from overvoltage caused by electrostatic discharge (ESD), electrical fast transients (EFT), and lightning. The unique design of the LV series devices incorporates eight 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 overvoltage on the power line, protecting any downstream components. The RLST236A054LV has a low typical capacitance of 3pF and operates with virtually no insertion loss to 1GHz. This makes the device ideal for protection of high-speed data lines such as USB 2.0, Firewire, DVI, and gigabit Ethernet interfaces. The low capacitance array configuration allows the user to protect four highspeed 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). • Srand-off Voltage:5v • Peak Power up to 300W@8*20μs Pulse • Low Leakage current IEC61000-4-2 • Level 4 ESD Protection IEC61000-4-4 • Level 4 EFT Protection • Low capacitance:0.7pF typical Circuit Diagram Pin Configuration Mechanical Characteristics • SOT-23 6L package • Molding compound flammability rating: UL 94V-0 • Packaging : Tape and Reel per EIA 481 • pb-Free Packages are Auailable Applications • USB 2.0 Power and Data Line Protection • Video Graphics Cards • Monitors and Flat Panel Displays • Digital Video Interface (DVI) • 10/100/1000 Ethernet • Notebook Computers • SIM Ports • ATM Interfaces • IEEE 1394 Firewire Ports 5 1 3 4 6 2 All data is subject to change,Please check our data sheets at www ruilon com for updates. ©2012 RuiLong Yuan,Inc. ESD 01 Protection Products Absolute Maximum Rating Rating Symbol Value Units Peak Pulse Power (tp =8/20μs) PPK 300 Watts ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact) VESD 15 8 kV Lead Soldering Temperature TK 260 (10 sec.) °C Operating Temperature TJ -55 to +125 °C TSTG -55 to +150 °C Storage Temperature Electrical Characteristics (T=25oC) RLST236A054LV Parameter Reverse Stand-Off Voltage Reverse Breakdown Voltage Symbol Conditions Minimum Typical Maximum Units VRWM - - - 5 V VBR It=1mA 6 7 - V - - 5 μA - - 12 V VR = 0V, f = 1MHz Any I/O pin to Ground - 1.2 1.5 pF VR = 0V, f = 1MHz Between I/O pins - 0.7 - pF Reverse Leakage Current IR Clamping Voltage VC Junction Capacitance ESD 02 Cj VRWM=5V ,T=25°C Pin 5 to 2 IPP=1A,tp= 8/20μs Any I/O pin to Ground All data is subject to change,Please check our data sheets at www ruilon com for updates. ©2012 RuiLong Yuan,Inc. Protection Products Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 10 110 90 % of Rated Power or I PP Peak Pulse Power - P Pk (kW) 100 1 0.1 80 70 60 50 40 30 20 10 0 0.01 0.1 1 10 100 0 1000 25 Pulse Duration - tp (µs) Pulse Waveform Waveform Parameters: tr = 8µs td = 20µs Clamping Voltage -V Percent of I PP 80 -t e 50 td = IPP/2 30 A 20 20.00 15.00 10.00 Waveform Parameters: tr = 8µs td = 20µs 5.00 0 5 10 15 150 25.00 10 0 125 (o C) 30.00 (V) 90 40 100 C 100 60 75 Clamping Voltage vs. Peak Pulse Current 110 70 50 Ambient Temperature - T 20 25 0.00 30 0.00 2.00 Time (µs) 4.00 6.00 8.00 Peak Pulse Current - I 10.00 12.00 PP (A) Normalized Capacitance vs. Reverse Voltage Forward Voltage vs. Forward Current 1.4 7.00 CJ (V R) / C J (V R=0) Forward Voltage -V F (V) 1.2 6.00 5.00 4.00 3.00 Waveform Parameters: tr = 8µs td = 20µs 2.00 1.00 0.8 0.6 0.4 0.2 f = 1 MHz 0 0.00 0.00 1 0 2.00 4.00 6.00 Forward Current - I 8.00 F 10.00 1 12.00 2 3 Reverse Voltage - V R (V) 4 5 (A) All data is subject to change,Please check our data sheets at www ruilon com for updates. ©2012 RuiLong Yuan,Inc. ESD 03 Protection Products Typical Characteristics Insert i on Loss S2 1 CH1S 21 LOG START. ESD 04 3 dB/ 0300 00 MHzS REF 0 dB TOP3 000 . 0000 00 MHz Anal og Cross Tal k CH1S 21 LOG START. 20 dB/ REF 0 dB 0300 00 MHz All data is subject to change,Please check our data sheets at www ruilon com for updates. STOP3 000 . 0000 00 MHz ©2012 RuiLong Yuan,Inc. Protection Products Applications Information Device Connection Options for Protection of Four High-Speed Data Lines The RLST236A054LV TVS is designed to protect four data lines from transient over-voltages by clamping them to afixed 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, 3, 4 and 6. The negative reference (REF1) is connected at pin 2. 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 (REF2) is connected at pin 5.The options for connecting the positive reference are as follows: 1. To protect data lines and the power line, connect pin 5 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. The RLST236A054LV can be isolated from the power supply by adding a series resistor between pin 5 and VCC. A value of 100kΩ is recommended. The internal TVS and steering diodes remain biased, providing the advantage of lower capacitance.3. In applications where no positive supply reference is available, or complete supply isolation is desired, the internal TVS may be used as the reference. In this case, pin 5 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 ). ESD Protection With RLST236A054LV. RLST236A054LV are optimized for ESD protection using the rail-to-rail topology. Along with good board layout, these devices virtually eliminate the disadvantages of using discrete components to implement this topology. Consider the situation shown in Figure 1 where discrete diodes or diode arrays are configured for rail-torail protection on a high speed line. During positive duration ESD events, the top diode will be forward biased when the voltage on the protected line exceeds Data Line and Power Supply Protection Using Vcc as reference Data Line Protection with Bias and Power Supply Isolation Resistor Data Line Protection Using Internal T VS Diode as Referenc e All data is subject to change,Please check our data sheets at www ruilon com for updates. ©2012 RuiLong Yuan,Inc. ESD 05 Protection Products Applications Information the reference voltage plus the VF drop of the diode. For negative events, the bottom diode will be biased when the voltage exceeds the VF of the diode. At first approximation, the clamping voltage due to the characteristics of the protection diodes is given by: VC = VCC + VF (for positive duration pulses) VC = -VF (for negative duration pulses) However, for fast rise time transient events, the effects of parasitic inductance must also be considered as shown in Figure 2. Therefore, the actual clamping voltage seen by the protected circuit will be: VC = VCC + VF + LP diESD/dt (for positive duration pulses) VC = -VF - LG diESD/dt (for negative duration pulses) ESD current reaches a peak amplitude of 30A in 1ns for a level 4 ESD contact discharge per IEC 61000-42. Therefore, the voltage overshoot due to 1nH of series inductance is: V = LP diESD/dt = 1X10-9 (30 / 1X10-9) = 30V Example: Consider a VCC = 5V, a typical VF of 30V (at 30A) for the steering diode and a series trace inductance of 10nH. The clamping voltage seen by the protected IC for a positive 8kV (30A) ESD pulse will be: VC = 5V + 30V + (10nH X 30V/nH) = 335V This does not take into account that the ESD current is directed into the supply rail, potentially damaging any components that are attached to that rail. Also note that it is not uncommon for the VF of discrete diodes to exceed the damage threshold of the protected IC. This is due to the relatively small junction area of typical discrete components. It is also possible that the power dissipation capability of the discrete diode will be exceeded, thus destroying the device. The RLST236A054LV is designed to overcome the inherent disadvantages of using discrete signal diodes for ESD suppression. The RLST236A054LV integrated TVS diode opology Figure 11 -- ““RailRail-To-Rail” Prot ection TTopology (First Approximation) Figure 2 - The Effects o f Parasitic Inductance When Using Discrete Components to Implement RailTo-Rail P rot ection Rail-T Figure 3 - RailTo-Rail P o r t ection U sing Using RailClamp T VS Arrays TV ESD 06 All data is subject to change,Please check our data sheets at www ruilon com for updates. ©2012 RuiLong Yuan,Inc. Protection Products Applications Information 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. Video Interface Protection Video interfaces are susceptible to transient voltages resulting from electrostatic discharge (ESD) and “hot plugging” cables. If left unprotected, the video interface IC may be damaged or even destroyed. Protecting a high-speed video port presents some unique challenges. First, any added protection device must have extremely low capacitance and low leakage current so that the integrity of the video signal is not compromised. Second, the protection component must be able to absorb high voltage transients without damage or degradation. As a minimum, the device should be rated to handle ESD voltages per IEC 61000-4-2, level 4 (±15kV air, ±8kV contact). The clamping voltage of the device (when conducting high current ESD pulses) must be sufficiently low enough to protect the sensitive CMOS IC. If the clamping voltage is too high, the “protected” device may latchup or be destroyed. Finally, the device must take up a relatively small amount of board space, particularly in portable applications such as notebooks and handhelds. The RLST236A054LV is designed to meet or exceed all of the above criteria. A typical video interface protection circuit is shown in Figure 4. All exposed lines are protected including R, G, B, H-Sync, V-Sync , and the ID lines for plug and play monitors. Figure 4 - Video Interface Protection Figure 5 - Dual USB Port Protection Universal Serial Bus ESD Protection The RLST236A054LV may also be used to protect the USB ports on monitors, computers, peripherals or portable systems. Each device will protect up to two USB ports (Figure 5). 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. Figure 6 - SIM Port All data is subject to change,Please check our data sheets at www ruilon com for updates. ©2012 RuiLong Yuan,Inc. ESD 07 DVI Protection The small geometry of a typical digital-visual interface (DVI) graphic chip will make it more susceptible to electrostatic discharges (ESD) and cable discharge events (CDE). Transient protection of a DVI port can be challenging. Digital-visual interfaces can often transmit and receive at a rate equal to or above 1Gbps. The high-speed data transmission requires the protection device to have low capacitance to maintain signal integrity and low clamping voltage to reduce stress on the protected IC. The RLST236A054LV has a low typical insertion loss of 1.5kV. If more common mode protection is needed, figure 9 shows how to design the RLST236A054LV on the IC side of the 10/100 Figure 7 - Digital Video Interface (DVI) Protection ESD 08 All data is subject to change,Please check our data sheets at www ruilon com for updates. ©2012 RuiLong Yuan,Inc. Protection Products Applications Information - Spice Model Figure 8 - 10/100 Ethernet Differential Protection Figure 9 - 10/100 Ethernet Differential and Common Mode Protection All data is subject to change,Please check our data sheets at www ruilon com for updates. ©2012 RuiLong Yuan,Inc. ESD 09 Protection Products Outline Drawing - SOT-23 6L DIM A e1 A A1 A2 b c D E1 E e e1 L L1 N 01 aaa bbb ccc D N 2X E/2 EI E 12 ccc C 2X N/2 TIPS e B D aaa C SEATING PLANE A2 DIMENSIONS MILLIMETERS INCHES MIN NOM MAXM IN NOM MAX .057 .035 .000 .006 .035 .045 .051 .010 .020 .003 .009 .110 .114 .122 .060 .063 .069 .110 BSC .037 BSC .075 BSC .012 .018 .024 (.024) 6 0° 10°0 .004 .008 .008 A H A1 C bxN bbb 1.45 0.90 0.15 0.00 .90 1.15 1.30 0.25 0.50 0.22 0.08 2.80 2.90 3.10 1.50 1.60 1.75 2.80 BSC 0.95 BSC 1.90 BSC 0.30 0.45 0.60 (0.60) 6 ° 10° 0.10 0.20 0.20 C A-B D c GAGE PLANE 0.25 L (L1) SEE DETAIL DETAIL A 01 A SIDE VIEW 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. Land Pattern - SOT-23 6L X DIM (C) G Z Y P C G P X Y Z DIMENSIONS MILLIMETERS INCHES (.098) .055 .037 .024 .043 .141 (2.50) 1.40 0.95 0.60 1.10 3.60 NOTES: 1. ESD 10 THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. All data is subject to change,Please check our data sheets at www ruilon com for updates. ©2012 RuiLong Yuan,Inc. RUILONG.YUAN CO.,LTD Tel: +86- 0755-82908296 Fax: +86- 0755-82908002 Email: jack@ruilon.com Website: http://www.ruilon.com RuiLongYuan Electronics are trademarks. Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. RUILONYUAN Electronics reserves the right to change or update, without notice, any information contained in this publication; to change, without notice, the design, construction, processing, or specification of any product; and to discontinue or limit production or distribution of any product. This publication supersedes and replaces all information previously supplied. Without expressed or written consent by an officer of RUILONYUAN Electronics, RUILONYUAN Electronics does not authorize the use of any of its products as components in nuclear facility applications, aerospace, or in critical life support devices or systems. RUILONYUAN Electronics expressly disclaims all implied warranties regarding the information contained herein, including, but not limited to, any implied warranties of merchantability or fitness for a particular purpose. RUILONYUAN Electronics’ only obligations are those in the RUILONYUAN Electronics Standard Terms and Conditions of Sale and in no case will RUILONYUAN Electronics be liable for any incidental, indirect, or consequential damages. All data is subject to change,Please check our data sheets at www ruilon com for updates. ©2012 RuiLong Yuan,Inc. ESD 11