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| ClampTM 4-Line ESD protection Array PROTECTION PRODUCTS - MicroClampTM Description The Clamp series of TVS arrays are designed to protect sensitive electronics from damage or latch-up due to ESD. They are designed for use in applications where board space is at a premium. Each device requires less than 2.9mm2 of PCB area and will protect up to four lines. They are unidirectional devices and may be used on lines where the signal polarities are above ground. TVS diodes are solid-state devices designed specifically for transient suppression. They feature large cross-sectional area junctions for conducting high transient currents. They offer desirable characteristics for board level protection including fast response time, low operating and clamping voltage, and no device degradation. The uClampTM0504A may be used to meet the immunity requirements of IEC 61000-4-2, level 4. The small SC89 package makes them ideal for use in portable electronics such as cell phones, PDA's, notebook computers, and digital cameras. These devices feature a leadfree, matte tin lead finish. They are compatible with both lead free and SnPb assembly techniques. TM UCLAMP0504A Features Transient protection for data lines to IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) Protects four I/O lines Ultra-small SC-89 package (1.7 x 1.7 x 0.6mm 0.6mm) 1.7 2 requires less than 2.9mm of PCB area Working voltage: 5V Low leakage current Low operating and clamping voltages Solid-state silicon-avalanche technology Mechanical Characteristics SC-89 (SOT-666) package Molding compound flammability rating: UL 94V-0 Marking : Marking Code Weight: 2.9mg (typical) Lead Finish: Matte Tin Packaging : Tape and Reel per EIA 481 Applications Cellular Handsets & Accessories Cordless Phones Personal Digital Assistants (PDA's) Notebooks & Handhelds Portable Instrumentation Digital Cameras Peripherals MP3 Players Dimensions 1.70 0.50 Schematic & PIN Configuration 1.25 1.70 0.30 0.60 Maximum Dimensions (mm) Revision 06/23/2004 1 SC-89 (Top View) www.semtech.com UCLAMP0504A PROTECTION PRODUCTS Absolute Maximum Rating R ating Peak Pulse Power (tp = 8/20s) Maximum Peak Pulse Current ( tp = 8/20s) ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact) Lead Soldering Temperature Operating Temperature Storage Temperature Symbol Pp k Ip p V PP TL TJ TSTG Value 100 7 +/- 20 +/- 12 260 (10 sec.) -55 to +125 -55 to +150 Units Watts Amps kV C C C Electrical Characteristics (T=25oC) Parameter Reverse Stand-Off Voltage Reverse Breakdown Voltage Reverse Leakage Current Reverse Leakage Current Forward Voltage Clamping Voltage Clamping Voltage Junction Capacitance Symbol VRWM V BR IR IR VF VC VC Cj It = 1mA VRWM = 5V, T=25C VRWM = 3V, T=25C IF = 10mA IPP = 1A, tp = 8/20s IPP = 7A, tp = 8/20s Between I/O Pins and Gnd VR = 0V, f = 1MHz 60 0.80 9 12 75 6 1 0.500 Conditions Minimum Typical Maximum 5 Units V V A A V V V pF 2004 Semtech Corp. 2 www.semtech.com UCLAMP0504A PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time 10 110 100 Peak Pulse Power - P PP (kW) 90 % of Rated Power or I PP 80 70 60 50 40 30 20 10 0.01 0.1 1 10 Pulse Duration - tp (s) 100 1000 0 0 25 50 75 100 125 150 Ambient Temperature - TA (oC) 1 Power Derating Curve 0.1 Clamping Voltage vs. Peak Pulse Current 12 10 Forward Voltage - VF (V) 6 8 6 4 2 0 0 1 2 3 4 5 6 7 8 Peak Pulse Current - Ipp (A) 8 Forward Voltage vs. Forward Current Clamping Voltage - Vc (V) 4 Waveform Parameters: tr = 8us td = 20us 2 Waveform Parameters: tr = 8us td = 20us 0 5 10 Forward Current - IF (A) 15 0 Junction Capacitance vs. Reverse Voltage 60 CH1 S21 LOG Insertion Loss S21 6 dB / REF 0 dB Capacitance - Cj (pF) 50 40 30 20 0 1 2 3 Reverse Voltage - VR (V) 4 5 START . 030 MHz . STOP 3000 000000 MHz 2004 Semtech Corp. 3 www.semtech.com UCLAMP0504A PROTECTION PRODUCTS Typical Characteristics (Con't.) ESD Clamping (8kV Contact per IEC 61000-4-2) ESD Clamping (-8kV Contact per IEC 61000-4-2) ESD Clamping (15kV air per IEC 61000-4-2) ESD Clamping (-15kV air per IEC 61000-4-2) 2004 Semtech Corp. 4 www.semtech.com UCLAMP0504A PROTECTION PRODUCTS Applications Information Device Connection for Protection of Four Data Lines These devices are designed to protect up to four unidirectional data lines. The device is connected as follows: 1. Unidirectional protection of four I/O lines is achieved by connecting pins 1, 3, 4, and 6 to the data lines. Pins 2 and 5 are connected to ground. The ground connection should be made directly to the ground plane for best results. The path length is kept as short as possible to reduce the effects of parasitic inductance in the board traces. Circuit Diagram 1 3 4 6 2, 5 Circuit Board Layout Recommendations for Suppression of ESD. Good circuit board layout is critical for the suppression of ESD induced transients. The following guidelines are recommended: Place the TVS near the input terminals or connectors to restrict transient coupling. Minimize the path length between the TVS and the protected line. Minimize all conductive loops including power and ground loops. The ESD transient return path to ground should be kept as short as possible. Never run critical signals near board edges. Use ground planes whenever possible. 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. Protection of Four Unidirectional Lines 2004 Semtech Corp. 5 www.semtech.com UCLAMP0504A PROTECTION PRODUCTS Typical Applications UCLAMP0504A 2004 Semtech Corp. 6 www.semtech.com UCLAMP0504A PROTECTION PRODUCTS Outline Drawing Land Pattern 2004 Semtech Corp. 7 www.semtech.com UCLAMP0504A PROTECTION PRODUCTS Marking Code Ordering Information Part Number uClamp 0504A.TCT Working Voltage 5V Device Qty per Marking Reel H 3,000 Reel Size 7 Inch H Note: (1) Device is symmetrical so there is no pin 1 identifier. MicroClamp, uClamp and Clamp are trademarks of Semtech Corporation Tape and Reel Specification H H H Tape Specification and Device Orientation Contact Information Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 www.semtech.com 2004 Semtech Corp. 8 |
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