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| SMDA05CN-5 THRU SMDA15CN-5 Bidirectional TVS Array for Protection of Five Lines PROTECTION PRODUCTS Description The SMDAxxCN-5 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 SMDAxxCN-5 is designed to provide transient suppression on multiple data lines and I/O ports. The low profile SO-8 design allows the user to protect up to five data and I/O lines with one package. The SMDAxxCN-5 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. 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 5 bidirectional 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 Mechanical Characteristics JEDEC SO-8 package Molding compound flammability rating: UL 94V-0 Marking : Part number, date code, logo Packaging : Tube or Tape and Reel per EIA 481 Applications RS-232 Data Lines RS-423 Data Lines LAN/WAN Equipment Servers Notebook & Desktop PC Set Top Box Peripherals Circuit Diagram Schematic & PIN Configuration SO-8 (Top View) Revision 9/2000 1 www.semtech.com SMDA05CN-5 THRU SMDA15CN-5 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 20 260 (10 sec.) -55 to +125 -55 to +150 Units Watts A C C C Electrical Characteristics SMDA05CN-5 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 V RWM V BR IR VC VC I PP Cj It = 1mA V RWM = 5V, T=25C IPP = 1A , tp = 8/20 s IPP = 10A , tp = 8/20 s tp = 8/20 s Betw een I/O Pins and Gnd V R = 0V, f = 1MHz 6 10 9.8 11 20 350 Co nd itio ns Minimum Typ ical Maximum 5 Units V V A V V A pF SMDA15CN-5 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 V RWM V BR IR VC VC I PP Cj It = 1mA V RWM = 15V, T=25C IPP = 1A , tp = 8/20 s IPP = 10A , tp = 8/20 s tp = 8/20 s Betw een I/O Pins and Gnd V R = 0V, f = 1MHz 16.7 1 24 30 10 75 Co nd itio ns Minimum Typ ical Maximum 15 Units V V A V V A pF a 2000 Semtech Corp. 2 www.semtech.com SMDA05CN-5 THRU SMDA15CN-5 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 75 100 125 150 175 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 0 td = IPP/2 e -t Clamping Voltage vs. Peak Pulse Current 35 Waveform Parameters: tr = 8s td = 20s 30 Clamping Voltage - VC (V) 25 20 15 10 5 SMDA05CN-5 SMDA15CN-5 Waveform Parameters: tr = 8s td = 20s 0 2 4 6 8 10 12 14 16 18 20 22 24 Peak Pulse Current - IPP (A) a 2000 Semtech Corp. 3 www.semtech.com SMDA05CN-5 THRU SMDA15CN-5 PROTECTION PRODUCTS Applications Information Device Connection Options for Protection of Four or Five Data Lines The SMDAxxCN-5 can be configured to protect either four or five bidirectional data lines. The options for connecting the devices are as follows: 1. Bidirectional protection of four I/O lines is achieved by connecting pins 1, 2, 3, and 4 to the data lines. Pins 5, 6, 7, and 8 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. In this configuration, the device can withstand the maximum specified transient impulse on four lines simultaneously. 2. Bidirectional protection of five I/O lines is achieved by connecting pins 1, 2, 3, 4, and 5 to the data lines. Pins 6, 7, and 8 are connected to ground. The ground connection should be made directly to the circuit board ground plane for best results. In this configuration, the device can withstand the maximum rated transient impulse on any two lines simultaneously. 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 Protection for Four Bidirectional Lines From Connector To Protected IC Protection for Five Bidirectional Lines From Connector 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. To Protected IC a 2000 Semtech Corp. 4 www.semtech.com SMDA05CN-5 THRU SMDA15CN-5 PROTECTION PRODUCTS Outline Drawing - SO-8 Land Pattern - SO-8 a 2000 Semtech Corp. 5 www.semtech.com SMDA05CN-5 THRU SMDA15CN-5 PROTECTION PRODUCTS Ordering Information Par t Numbe r SMDA 05CN -5.TB SMDA 05CN -5.TE SMDA 15CN -5.TB SMDA 15CN -5.TE Wo r king Vo ltage 5V 5V 15V 15V Qty p e r Reel 500 2,500 500 2,500 R e e l Size 7 Inch 13 Inch 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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