uClamp3301H Low Voltage µClampTM for ESD and CDE Protection PROTECTION PRODUCTS - MicroClampTM Description Features The µClamp series of Transient Voltage Suppressors (TVS) are designed to replace multilayer varistors (MLVs) in portable applications such as cell phones, notebook computers, and PDAs. They offer superior electrical characteristics such as lower clamping voltage and no device degradation when compared to MLVs. They are designed to protect sensitive semiconductor components from damage or upset due to electrostatic discharge (ESD), lightning, electrical fast transients (EFT), and cable discharge events (CDE). The µclampTM3301H is constructed using Semtech’s proprietary EPD process technology. The EPD process provides low standoff voltages with significant reductions in leakage currents and capacitance over siliconavalanche diode processes. They feature a true operating voltage of 3.3 volts for superior protection when compared to traditional pn junction devices. The µclamp3301H is in a SOD-523 package and will protect one unidirectional line. They give the designer the flexibility to protect one line in applications where arrays are not practical. They may be used to meet the ESD immunity requirements of IEC 61000-4-2, Level 4 (15kV air, 8kV contact discharge). TM Transient protection for data lines to Mechanical Characteristics EIAJ SOD-523 package Molding compound flammability rating: UL 94V-0 Marking : Marking code, cathode band Packaging : Tape and Reel per EIA 481 Lead Finish: Matte tin Applications Dimensions 0.35 IEC 61000-4-2 (ESD) 20kV (air), 10kV (contact) IEC 61000-4-4 (EFT) 40A (tp = 5/50ns) Cable Discharge Event (CDE) Ultra-small SOD-523 package (1.7 x 0.9 x 0.7mm) Protects one I/O or power line Low clamping voltage Working voltage: 3.3V Low leakage current Solid-state silicon-avalanche technology Cellular Handsets & Accessories Cordless Phones Personal Digital Assistants (PDAs) Notebooks & Handhelds Portable Instrumentation Digital Cameras Peripherals MP3 Players Schematic & PIN Configuration 1.70 1.30 0.9 0.70 Maximum Dimensions (mm) Revision 06/18/2004 SOD-523 (Top View) 1 www.semtech.com uClamp3301H PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbol Value Units Peak Pulse Power (tp = 8/20µs) Pp k 40 Watts Maximum Peak Pulse Current (tp = 8/20µs) Ip p 5 Amps ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact) V PP +/- 20 +/- 15 kV Lead Soldering Temperature TL 260 (10 sec.) °C Operating Temperature TJ -55 to +125 °C TSTG -55 to +150 °C Storage Temperature Electrical Characteristics (T=25oC) Parameter Reverse Stand-Off Voltage Symbol Conditions Minimum Typical VRWM Maximum Units 3.3 V Punch-Through Voltage V PT IPT = 2µA 3.5 V Snap -Back Voltage VSB ISB = 50mA 2.8 V Reverse Leakage Current IR VRWM = 3.3V Clamp ing Voltage VC Clamp ing Voltage 0.5 µA IPP = 1A, tp = 8/20µs 5.5 V VC IPP = 5A, tp = 8/20µs 8.0 V Reverse Clamp ing Voltage VCR IPP = 1A, tp = 8/20µs 2.4 V 30 pF Cj I/O p in to Gnd VR = 0V, f = 1MHz 25 Junction Cap acitance I/O p in to Gnd VR = 3.3V, f = 1MHz 14 2004 Semtech Corp. 2 0.05 pF www.semtech.com uClamp3301H PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 110 1 100 % of Rated Power or I PP Peak Pulse Power - P PP (kW) 90 0.1 80 70 60 50 40 30 20 10 0 0 25 0.01 0.1 1 10 100 50 75 100 125 150 Ambient Temperature - TA (oC) 1000 Pulse Duration - tp (µs) Clamping Voltage vs. Peak Pulse Current Junction Capacitance vs. Reverse Voltage 12 25.0 20.0 8 Capacitance - Cj (pF) Clamping Voltage - VC (V) f = 1 MHz 10 6 4 Waveform Parameters: tr = 8µs td = 20µs 2 15.0 10.0 5.0 0 0 1 2 3 4 0.0 5 0 Peak Pulse Current - IPP (A) Insertion Loss S21 CH1 S21 LOG START . 030 MHz 2004 Semtech Corp. 0.5 1 1.5 2 2.5 Reverse Voltage - VR (V) 3 3.5 ESD Clamping (8kV Contact per IEC 61000-4-2) 6 dB / REF 0 dB STOP 3000. 000000 MHz 3 www.semtech.com uClamp3301H PROTECTION PRODUCTS Applications Information Device Schematic & Pin Configuration Device Connection Options The µclamp3301H is designed to protect one I/O, or power supply line. It will present a high impedance to the protected line up to 3.3 volts. It will “turn on” when the line voltage exceeds 3.5 volts. The device is unidirectional and may be used on lines where the signal polarity is above ground. The cathode band should be placed towards the line that is to be protected. EPD TVS Characteristics These devices are constructed using Semtech’s proprietary EPD technology. The structure of the EPD TVS is vastly different from the traditional pn-junction devices. At voltages below 5V, high leakage current and junction capacitance render conventional avalanche technology impractical for most applications. However, by utilizing the EPD technology, these devices can effectively operate at 3.3V while maintaining excellent electrical characteristics. EPD TVS IV Characteristic Curve IPP The EPD TVS employs a complex nppn structure in contrast to the pn structure normally found in traditional silicon-avalanche TVS diodes. The EPD mechanism is achieved by engineering the center region of the device such that the reverse biased junction does not avalanche, but will “punch-through” to a conducting state. This structure results in a device with superior DC electrical parameters at low voltages while maintaining the capability to absorb high transient currents. ISB IPT VF IR VRWM VSB VPT VC IF 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 100% 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. 2004 Semtech Corp. 4 www.semtech.com uClamp3301H PROTECTION PRODUCTS Outline Drawing Land Pattern 2004 Semtech Corp. 5 www.semtech.com uClamp3301H PROTECTION PRODUCTS Marking Code Ordering Information 3H Part Number Working Voltage uClamp 3301H.TCT 5V Device Qty per Marking Reel 3H 3,000 Reel Size 7 Inch MicroClamp, uClamp and µClamp are trademarks of Semtech Corporation Tape and Reel Specification Tape Specifications Device Orientation in Tape Contact Information Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 2004 Semtech Corp. 6 www.semtech.com