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SR2.8TC Dataheets PDF



Part Number SR2.8TC
Manufacturers Semtechoration
Logo Semtechoration
Description RailClamp Low Capacitance TVS Diode Array
Datasheet SR2.8TC DatasheetSR2.8TC Datasheet (PDF)

RailClamp™ Low Capacitance TVS Diode Array PROTECTION PRODUCTS Description RailClamps are surge rated diode arrays designed to protect high speed data interfaces. The SR series has been specifically designed to protect sensitive components which are connected to data and transmission lines from overvoltage caused by ESD (electrostatic discharge), EFT (electrical fast transients), and tertiary lightning. The unique design of the SR series devices incorporates four surge rated, low capacitance ste.

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RailClamp™ Low Capacitance TVS Diode Array PROTECTION PRODUCTS Description RailClamps are surge rated diode arrays designed to protect high speed data interfaces. The SR series has been specifically designed to protect sensitive components which are connected to data and transmission lines from overvoltage caused by ESD (electrostatic discharge), EFT (electrical fast transients), and tertiary lightning. The unique design of the SR series devices incorporates four surge rated, low capacitance steering diodes and a TVS diode in a single package. The TVS diode is constructed using Semtech’s proprietary low voltage EPD technology for superior electrical characteristics at 2.8 volts. 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 two high-speed data or transmission lines. The low inductance construction minimizes voltage overshoot during high current surges. SR2.8 Features ! ESD protection to IEC 61000-4-2, Level 4 ! Array of surge rated diodes with internal ! ! ! ! ! ! ! ! ! EPD TVS diode Protects two I/O lines Low capacitance (<10pF) for high-speed interfaces Low leakage current (< 1µA) Low operating voltage: 2.8V Solid-state technology Mechanical Characteristics JEDEC SOT-143 package Molding compound flammability rating: UL 94V-0 Marking : R2.8 Packaging : Tape and Reel per EIA 481 Applications ! ! ! ! ! ! ! 10/100 Ethernet Firewire Sensitive Analog Inputs Video Line Protection Portable Electronics Microcontroller Input Protection WAN/LAN Equipment Circuit Diagram Pin 4 Schematic & PIN Configuration 4 1 Pin 2 Pin 3 2 3 Pin 1 SOT-143 (Top View) Revision 9/2000 1 www.semtech.com SR2.8 PROTECTION PRODUCTS Absolute Maximum Rating R ating Peak Pulse Power (tp = 8/20µs) Peak Pulse Current (tp = 8/20µs) Peak Forward Voltage (IF = 1A, tp=8/20µs) Lead Soldering Temperature Operating Temperature Storage Temperature Symbol Pp k IP P VFP TL TJ TSTG Value 200 14 1.5 260 (10 sec.) -55 to +125 -55 to +150 Units Watts A V °C °C °C Electrical Characteristics SR 2.8 Par ame te r Reverse Stand-Off Voltage Punch-Through Voltage Snap -Back Voltage Reverse Leakage Current Clamp ing Voltage Clamp ing Voltage Maximum Peak Pulse Current Junction Cap acitance Symbo l VRWM V PT VSB IR VC VC IP P Cj IPT = 2µ A ISB = 50mA VRWM = 2.8V, T=25°C IPP = 1A, tp = 8/20µ s IPP = 5A, tp = 8/20µ s tp = 8/20µ s Between I/O p ins and Gnd VR = 0V, f = 1MHz Between I/O p ins VR = 0V, f = 1MHz 6 3.0 2.8 1 5.0 8.5 14 10 Co nditio ns Minimum Typical Maximum 2.8 Units V V V µA V V A pF 3 pF  2000 Semtech Corp. 2 www.semtech.com SR2.8 PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time 10 Peak Pulse Power - PPP (kW) 110 100 % of Rated Power or P IP 90 80 70 60 50 40 30 20 10 0.01 0.


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