RClamp0504S RailClamp Low Capacitance TVS Array

Transcription

1 - RailClamp Description RailClamps are surge rated diode arrays designed to protect high speed data interfaces. This 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), and EFT (electrical fast transients). The unique design 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 low capacitance array configuration allows the user to protect four high-speed data or transmission lines. The low inductance construction minimizes voltage overshoot during high current surges. This device is optimized for ESD protection of portable electronics. They may be used to meet the ESD iunity requirements of IEC 6-4-2, Level 4 (±5kV air, ±8kV contact discharge). RClamp54S RailClamp Low Capacitance TVS Array Features Transient protection for high-speed data lines to IEC (ESD) ±5kV (air), ±8kV (contact) IEC (EFT) 4A (5/5ns) Array of surge rated diodes with internal TVS Diode Small package saves board space Protects up to four I/O lines & power line Low capacitance (<pf) for high-speed interfaces No insertion loss to 2.GHz Low leakage current and clamping voltage Low operating voltage: 5.V Solid-state silicon-avalanche technology Mechanical Characteristics JEDEC SOT-2 6L package Nominal Dimensions: 2.9x2.8 RoHS/WEEE Compliant Molding compound flaability rating: UL 94V- Marking: Marking Code Packaging: Tape and Reel Applications USB 2. USB OTG Monitors and Flat Panel Displays Digital Visual Interface (DVI) Gigabit Ethernet IEEE 94 Firewire Ports Circuit Diagram Schematic & PIN Configuration SOT-2 6L (Top View) Revision /7/28

2 Absolute Maximum Rating Rating Symbol Value Units Peak Peak Pulse Power (tp = 8/2µs) Pulse Current (tp = 8/2µs) P pk 5 Watts I PP 6 A ESD per IEC (Air) ESD per IEC (Contact) V ESD 5 8 kv Operating Temperature T J -55 to +25 C Storage Temperature T STG 55 to +5 - C Electrical Characteristics (T=25 o C) Parameter Symbol Conditions Minimum Typical Maximum Units Reverse Stand-Off Voltage V WM R in 5 to 2 P 5 V Reverse Breakdown Voltage B I t = ma Pin 5 to 2 V R 6 V Reverse Leakage Current I R V RWM = 5V, T=25 C Pin 5 to 2 Clamping Voltage V C I PP = A, tp = 8/2µ s Any pin to pin 2 Clamping Voltage V C I PP = 6A, tp = 8/2µ s Any pin to pin 2 Junction Capacitance C j V R = V, f = Any I/O pin to pin 2 V R = V, f = Between I/O pins µ A 5 V 25 V pf.5 pf Note : I/O pins are pin,, 4, and 6 28 Semtech Corp. 2

3 Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve Peak Pulse Power - P PP (kw)... Pulse Duration - tp (µs) % of Rated Power or IPP Ambient Temperature - T A ( o C) Pulse Waveform Clamping Voltage vs. Peak Pulse Current Percent of I PP e -t td = I PP /2 Waveform Parameters: tr = 8µs td = 2µs Time (µs) Clamping Voltage - V C (V) Line to Line Line to Ground Waveform Parameters: tr = 8µs td = 2µs Peak Pulse Current - I PP (A) Forward Voltage vs. Peak Pulse Current Normalized Junction Capacitance vs. Reverse Voltage Forward Voltage - V F (V) Waveform Parameters: tr = 8µs td = 2µs CJ(VR) / CJ(VR=) Peak Pulse Current - I PP (A) f = Reverse Voltage - V R (V) 28 Semtech Corp.

4 Insertion Loss S2 (I/O to Pin 2) Insertion Loss S2 (I/O to I/O) CH S2 LOG 6 db / REF db CH S2 LOG 6 db / REF db : -.8 db 9 : -.6 db 9 2: db.8 GHz 2: db.8 GHz db -6 db 4 2 : -.47 db GHz 4: -.58 db 2.5 GHz db -6 db 2 : db 2.5 GHz -2 db -2 db -8 db -8 db -24 db -24 db - db - db -6 db GHz GHz -6 db GHz GHz START. STOP. Analog Crosstalk START. STOP. ESD Clamping (+8kV Contact per IEC 6-4-2) CH S2 LOG 2 db / REF db START. STOP. Note: Data is taken with a x attenuator 28 Semtech Corp. 4

5 Applications Information Device Connection Options for Protection of Four 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,, 4 and 6. Pin 2 should be connected directly to a ground plane. The path length is kept as short as possible to minimize parasitic inductance. The positive reference is connected at pin 5. The options for connecting the positive reference are as follows:. To protect data lines and the power line, connect pin 5 directly to the positive supply rail (V CC ). 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 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).. In applications where complete supply isolation is desired, the internal TVS is again used as the reference and V CC is connected to one of the I/O inputs. An example of this configuration is the protection of a SIM port. The Clock, Reset, I/O, and VCC lines are connected at pins,, 4, and 6. Pin 2 is connected to ground and pin 5 is not connected. Protection of Four Data Lines and Power Supply Line Protection of Four Data Lines Using Internal TVS Diode as Reference 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 % 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. 28 Semtech Corp. 5

6 Applications Information - Spice Model.7 nh RClamp54S Spice Model RClamp54S Spice Parameters Parameter IS BV VJ RS IBV CJO TT U nit D (LCRD) D 2 (LCRD) D (TVS) Amp.29E-8.5E-6.78E- Volt Volt Ohm Farad.E-2.8E-2 E-2 Amp E- E- E- sec 2.54E E E- 9 M N EG ev Semtech Corp. 6

7 Outline Drawing - SOT-2 6L 2X E/2 ccc C 2X N/2 TIPS aaa C SEATING PLANE C A N 2 B D SIDE VIEW e A bxn bbb e EI A2 D E A C A-B D SEE DETAIL DIMENSIONS INCHES MILLIMETERS DIM MIN NOM MAX MIN NOM MAX A A A b c D E E e. BSC.7 BSC 2.8 BSC.95 BSC e.75 BSC.9 BSC L L (.24) (.6) N aaa.4. bbb.8.2 ccc.8.2 GAGE PLANE A.25 H DETAIL A L (L) c NOTES:. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DATUMS -A- AND -B- TO BE DETERMINED AT DATUM PLANE -H-. DIMENSIONS "E" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. Land Pattern - SOT-2 6L X (C) P G Y Z DIM C G P X Y Z DIMENSIONS INCHES MILLIMETERS (.98) (2.5) NOTES:. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 28 Semtech Corp. 7

8 Marking Ordering Information Part Number Qty per Reel Reel Size S54 RClamp54S.TCT, 7 Inch Note: This is a lead-free RoHS/WEEE compliant device RailClamp and RClamp are marks of Semtech Corporation Tape and Reel Specification User Direction of feed A B K.2 +/ / /-.5 Tape Width B, (Max) D D E F K (MAX) P P P 2 T(MAX) W (.65) ±.5.75±..5± ±. 4.±. 2.± Contact Information Semtech Corporation Protection Products Division 2 Flynn Rd., Camarillo, CA 92 Phone: (85)498-2 FAX (85) Semtech Corp. 8