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| Unidirectional TVS Array for Protection of Six Lines PROTECTION PRODUCTS Description The SMDA series of transient voltage suppressors are designed to protect components which are connected to data and transmission lines from voltage surges caused by ESD (electrostatic discharge), EFT (electrical fast transients), and lightning. TVS diodes are characterized by their high surge capability, low operating and clamping voltages, and fast response time. This makes them ideal for use as board level protection of sensitive semiconductor components. The SMDA05-6 is designed to provide transient suppression on multiple data lines and I/O ports. It is designed to operate on 5V digital lines. The low profile SO-8 design allows the user to protect up to six data and I/O lines with one package. The SMDA05-6 TVS diode array will meet the surge requirements of IEC 61000-4-2 (Formerly IEC 801-2), Level 4, Human Body Model for air and contact discharge. SMDA05-6 Features u 300 watts peak pulse power (tp = 8/20s) u Transient protection for data lines to IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 12A (8/20s) Protects up to 6 unidirectional lines Low operating voltage Low clamping voltage Solid-state silicon avalanche technology u u u u u u u u u u u u u u u u u Mechanical Characteristics JEDEC SO-8 package UL 497B listed Molding compound flammability rating: UL 94V-0 Marking : Part number, date code, logo Packaging : Tube or Tape and Reel per EIA 481 Applications 5V data & I/O lines Communication lines Microprocessor based equipment LAN/WAN equipment Servers Notebook & Desktop PC Instrumentation Peripherals Circuit Diagram Schematic & PIN Configuration SO-8 (Top View) Revision 9/2000 1 www.semtech.com SMDA05-6 PROTECTION PRODUCTS Absolute Maximum Rating R ating Peak Pulse Pow er (tp = 8/20 s) Peak Pulse Current (tp = 8/20 s) Lead Sold ering Temp erature Op erating Temp erature Storage Temp erature Symbo l Pp k I PP TL TJ TSTG Value 300 17 260 (10 sec.) -55 to +125 -55 to +150 Units Watts A C C C Electrical Characteristics SMDA05-6 Par ame te r Reverse Stand -Off Voltage Reverse Breakd ow n Voltage Reverse Leakage Current Clamp ing Voltage Clamp ing Voltage Maximum Peak Pulse Current Junction Cap acitance Symbo l VRWM V BR IR VC VC I PP Cj It = 1mA V RWM = 5V, T=25C IPP = 1A , tp = 8/20 s IPP = 5A , tp = 8/20 s tp = 8/20 s Betw een I/O p ins and Gnd V R = 0V, f = 1MHz 6 20 9.8 11 17 400 Co nd itio ns Minimum Typ ical Maximum 5 Units V V A V V A pF a 2000 Semtech Corp. 2 www.semtech.com SMDA05-6 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 IPP 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 Pulse Waveform 110 100 90 80 Percent of IPP 70 60 50 40 30 20 10 0 0 5 10 15 Time (s) 20 25 30 td = IPP/2 e -t Clamping Voltage vs. Peak Pulse Current 11 Waveform Parameters: tr = 8s td = 20s 10 Clamping Voltage - VC (V) 9 8 7 6 5 4 3 2 1 0 0 2 4 6 8 10 12 14 16 18 Peak Pulse Current - IPP (A) Waveform Parameters: tr = 8s td = 20s ESD Pulse Waveform (IEC 61000-4-2) Level IEC 61000-4-2 Discharge Parameters First Peak Current (A) 1 2 3 4 7.5 15 22.5 30 Peak Current at 30 ns (A) 4 8 12 16 Peak Current at 60 ns (A) 8 4 6 8 Test Test Voltage Voltage (Contact ( A ir Disch arge) Disch arge) (kV ) (kV ) 2 4 6 8 2 4 8 15 a 2000 Semtech Corp. 3 www.semtech.com SMDA05-6 PROTECTION PRODUCTS Applications Information Device Connection for Protection of Six Data Lines The SMDA05-6 is designed to protect up to 6 data or I/O lines operating at 5 volts. They are unidirectional devices and may be used on lines where the signal polarities are above ground (i.e. 0 to 5V). The device is connected as follows: l Circuit Diagram Pins 1, 2, 3, 4, 5 and 8 are connected to the lines that are to be protected. Pins 6 and 7 are connected to ground. The ground connections 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 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: l l l l l l Connection Diagram DATA IN DATA OUT 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. 8 7 6 5 1 2 3 4 DATA IN DATA OUT a 2000 Semtech Corp. 4 www.semtech.com SMDA05-6 PROTECTION PRODUCTS Outline Drawing - SO-8 Land Pattern - SO-8 a 2000 Semtech Corp. 5 www.semtech.com SMDA05-6 PROTECTION PRODUCTS Ordering Information Par t Numbe r SMDA05-6.TB SMDA05-6.TE Wo r king Vo ltage 5V 5V Qty p e r Reel 500 2,500 R e e l Size 7 Inch 13 Inch Note: (1) No suffix indicates tube pack. Contact Information Semtech Corporation Protection Products Division 652 Mitchell Rd., Newbury Park, CA 91320 Phone: (805)498-2111 FAX (805)498-3804 a 2000 Semtech Corp. 6 www.semtech.com |
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