RClamp®3354S Low Voltage RClamp® Surge Protection for GbE Interfaces PROTECTION PRODUCTS - RailClamp® Description Features ® u Transient protection for high-speed data lines to RailClamp TVS diodes are 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®3354S incorporates surge rated, low capacitance steering diodes and a TVS diode in a single package. Each device will protect up to four high-speed lines. The RClamp3354S can withstand a high level of surge current (25A, 8/20us) while maintaining a low loading capacitance of less than 5pF. The high surge capability means it can be used in high threat environments in applications such as Gigabit Ethernet, telecommunication lines, and LVDS interfaces. The RClamp3354S is constructed using Semtech’s proprietary EPD process technology. The EPD process provides low stand-off voltages with significant reductions in leakage current and capacitance over silicon-avalanche diode processes. It features a low operating voltage of 3.3 volts for superior protection. The RClamp3354S is in a 5-lead SOT-23 package. The leads are finished with lead-free matte tin. IEC 61000-4-2 (ESD) 30kV (air), 30kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 25A (8/20µs) u u u u u u Array of surge rated diodes with internal TVS Diode Protects up to four I/O lines Low capacitance (<5pF) for high-speed interfaces Low Dynamic Resistance: 0.25 Ohms Low operating voltage: 3.3V Solid-state silicon-avalanche technology Mechanical Characteristics u u u u u JEDEC SOT-23 5L package Pb-Free, Halogen Free, RoHS/WEEE Compliant Molding compound flammability rating: UL 94V-0 Marking : Marking code + date code Packaging : Tape and Reel Applications u u u u u Circuit Diagram 10/100/1000 Ethernet Central Office Equipment LVDS Interfaces MagJacks / Integrated Magnetics Notebooks / Desktops / Servers Pin Configuration # # % ) * * $ % ) #/$*%)2#2 $ #/$*%)2%2 1/24/2013 1 www.semtech.com RClamp3354S PROTECTION PRODUCTS Absolute Maximum Ratings Rating Symbol Value Units Peak Pulse Power (tp = 8/20µs) PPK 400 W Peak Pulse Current (tp = 8/20µs) IPP 25 A 30 ESD per IEC 61000-4-2 (Air) kV VESD ESD per IEC 61000-4-2 (Contact) TJ -55 to +85 O TSTG -55 to +150 O Operating Temperature Storage Temperature 30 C C Electrical Characteristics (T=25OC unless otherwise specified) Parameter Reverse Stand-Off Voltage Symbol Conditions Min. Typ. VRWM Max. Units 3.3 V 5.3 V Punch-Through Voltage VPT IPT = 2µA 3.5 Snap-Back Voltage VSB ISB = 50mA 2.8 IR VRWM = 3.3V, T=25°C 0.5 IPP = 1A, tp = 8/20µs Any I/O to Ground 5.5 IPP = 10A, tp = 8/20µs Any I/O to Ground 10 IPP = 25A, tp = 8/20µs Any I/O to Ground 16 Reverse Leakage Current Clamping Voltage Junction Capacitance 2013 Semtech Corporation. VC CJ V Between I/O pins and Ground VR = 0V, f = 1MHz 3.8 Between I/O pins VR = 0V, f = 1MHz 2.0 2 µA V 5 pF www.semtech.com RClamp3354S PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs.Pulse Time Power Derating Curve 120 10 TA = 25OC % of Rated Power or IPP Peak Pulse Power - PPP (kW) 100 1 0.1 80 60 40 20 DR040512:25:125:150 DR040412-400 0.01 0.1 1 10 100 0 1000 0 25 Pulse Duration - tp (µs) 125 ESD Clamping (+8kV Contact per IEC 61000-4-2) ESD Clamping (-8kV Contact per IEC 61000-4-2) 50 TA = 25OC +8kV ESD Pulse per IEC61000-4-2 Corrected for 40dB attenuation. Measured with 50Ω, 40dB attenuator; 50Ω Scope Input Impedance 0 Voltage (V) 100 50 0 -50 TA = 25OC -8kV ESD Pulse per IEC61000-4-2 Corrected for 40dB attenuation. Measured with 50Ω, 40dB attenuator; 50Ω Scope Input Impedance -100 -150 AR_RC3354S_ESD -8kV AR_RC3354S_ESD +8kV -50 -200 -20 0 20 40 60 80 100 -20 0 20 Time (ns) Positive TLP Characteristic 40 Time (ns) 60 80 100 Negative TLP Characteristic 0 30 TA = 25OC TLP Parameters tp = 100ns; tr = 200ps Pins 1, 3, 4 or 5 to Gnd TA = 25OC TLP Parameters tp = 100ns; tr = 200ps Pins 1, 3, 4 or 5 to Gnd -5 TLP Current - IDUT (A) 25 TLP Current - IDUT (A) 150 200 150 Voltage (V) 50 75 100 Ambient Temperature - TA (OC) 20 15 RDYN = 0.19Ω Best Fit 4A to 16A 10 -10 -15 RDYN = 0.34Ω Best Fit 4A to 16A -20 -25 5 AR_RC3354S_TLP- AR_RC3354S_TLP+ -30 0 0 2 4 6 Clamping Voltage - VC (V) 2013. Semtech Corporation. 8 -12 10 3 -10 -8 -6 Clamping Voltage - VC (V) -4 -2 0 www.semtech.com RClamp3354S PROTECTION PRODUCTS Typical Characteristics (Continued) Typical Insertion Loss S21 Analog Crosstalk 5 0 TA = 25OC Pin1 to Pin5 0 Crosstalk - CT (dB) Insertion Loss - IL (dB) -20 -5 -10 -15 -60 TA = 25OC Pin1 to Gnd -20 -40 AR_RC3354S_CT AR_RC3354S_IL -25 -80 1 10 100 1000 Frequency - f (MHz) 10000 1 Capacitance v Reverse Voltage (Line to GND) 10 100 1000 Frequency - f (MHz) 10000 Capacitance v Reverse Voltage (Line to Line) 1.5 5 TA = 25OC f = 1 MHz TA = 25OC f = 1 MHz Capacitance - CJ (pF) Capacitance - CJ (pf) 4 3 2 1.0 0.5 1 AR_RC3354S_CAP (LG) AR_RC3354S_CAP (LL) 0.0 0 0 0.5 1 1.5 2 2.5 3 0 3.5 Reverse Voltage - VR(V) 2013 Semtech Corporation. 4 1 2 Reverse Voltage - VR(V) 3 4 www.semtech.com RClamp3354S PROTECTION PRODUCTS Applications Information Gigabit Ethernet Protection Solutions Ethernet systems with connections external to the building are subject to high-level transient threats. This type of equipment may even be required to meet the surge immunity requirements of Telcordia GR-1089. Reliable protection of the Ethernet transceiver requires a device that can absorb the expected transient energy, clamp the incoming surge to a safe level, and yet remain transparent to the system under normal operation. The RClamp3354S has been designed to meet these demanding requirements. Transient Protection When designing Ethernet protection, the entire system must be considered. An Ethernet port includes interface magnetics in the form of transformers and common mode chokes. Transformers and chokes can be discrete components, but integrated solutions that include the RJ-45 connector, resistors, capacitors, and protection are also available. In either case, the transformer will provide a high level of common mode isolation to external voltages, but no protection for metallic (line-to-line) surges. During a metallic transient event, current will flow into one line, through the transformer and back to the source. As the current flows, it charges the windings of the transformer on the line side. Once the surge is removed, the windings on the line side will stop charging and will transfer its stored energy to the IC side where the PHY IC is located. The magnitude and duration of the surge is attenuated by the inductance of the magnetics. The amount of attenuation will vary by vendor and configuration of the magnetics. It is this transferred energy that must be clamped by the protection circuitry. 2013. Semtech Corporation. 5 www.semtech.com RClamp3354S PROTECTION PRODUCTS Outline Drawing - SOT-23 5L $ % $ $ $ + %$ $ $ # # ! " #/$*%)2# ) ' ! " - . % , % +% $ '$ $ '++ % + % % & & & & % $ $ + ! +$ % ' + $% ( " ) '$ )* +% +' % %+ Land Pattern - SOT-23 5L $ $ % $ $ ! ! " # 1 / + " / 1 #/$*%)2##2 % , % +% $ % + $ $ + ! ) + (%+ + ( + '+ % % / % ' /%'+ $ '( '+ +%' % '+ /%'+ %$ /0 $ '( '+ ' + $ 2013 Semtech Corporation. 6 + " www.semtech.com RClamp3354S PROTECTION PRODUCTS Ordering Information BC Marking Part Number Lead Finish Qty per Reel Reel Size RClamp3354S.TCT Matte Tin 3,000 7 inch RailClamp and RClamp are Trademarks of Semtech Corporation #/$*%)2-2 YW = Alphanumeric character Date Code Tape and Reel Specification ! , : 3" ;: 3 (<= " - BC ! BC > BC . #/$*%)2/2 , #6 ! - 1 ? D !8"9**5!5 @ 1 . ' All dimensions in mm A0 B0 K0 B (Max) D D1 E F K (Max) P P0 P2 T (MAX) W 3.23 ±0.05 3.17 ±0.05 1.37 ±0.05 4.2 1.5 +0.1 -0.0 1.0 ±0.05 1.75 ±0.10 3.5 ±0.05 2.4 4.0 ±0.1 4.0 ±0.1 2.0 ±0.05 0.4 8.0 +0.3 -0.1 Contact Information Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 2013. Semtech Corporation. 7 www.semtech.com