SMDA05CN-5 THRU SMDA15CN-5 Bidirectional TVS Array for Protection of Five Lines PROTECTION PRODUCTS Description Features u 300 watts peak pulse power (tp = 8/20µs) u Transient protection for data lines to 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. u u u u 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. IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 12A (8/20µs) Protects up to 5 bidirectional lines Low operating voltage Low clamping voltage Solid-state silicon avalanche technology Mechanical Characteristics u u u u 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. 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 u u u u u u u Circuit Diagram RS-232 Data Lines RS-423 Data Lines LAN/WAN Equipment Servers Notebook & Desktop PC Set Top Box Peripherals 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 Symbo l Value Units Peak Pulse Pow er (tp = 8/20µ s) Pp k 300 Watts Peak Pulse Current (tp = 8/20µ s) I PP 20 A Lead Sold ering Temp erature TL 260 (10 sec.) °C Op erating Temp erature TJ -55 to +125 °C TSTG -55 to +150 °C Storage Temp erature Electrical Characteristics SMDA05CN-5 Par ame te r Reverse Stand -Off Voltage Reverse Breakd ow n Voltage Symbo l Co nd itio ns Minimum Typ ical V RWM Maximum Units 5 V V BR It = 1mA Reverse Leakage Current IR V RWM = 5V, T=25°C 10 µA Clamp ing Voltage VC IPP = 1A , tp = 8/20µ s 9.8 V Clamp ing Voltage VC IPP = 10A , tp = 8/20µ s 11 V Maximum Peak Pulse Current I PP tp = 8/20µ s 20 A Junction Cap acitance Cj Betw een I/O Pins and Gnd V R = 0V, f = 1MHz 350 pF Symbo l Co nd itio ns Maximum Units 15 V 6 V SMDA15CN-5 Par ame te r Reverse Stand -Off Voltage Reverse Breakd ow n Voltage Minimum V RWM Typ ical V BR It = 1mA Reverse Leakage Current IR V RWM = 15V, T=25°C 1 µA Clamp ing Voltage VC IPP = 1A , tp = 8/20µ s 24 V Clamp ing Voltage VC IPP = 10A , tp = 8/20µ s 30 V Maximum Peak Pulse Current I PP tp = 8/20µ s 10 A Junction Cap acitance Cj Betw een I/O Pins and Gnd V R = 0V, f = 1MHz 75 pF ã 2000 Semtech Corp. 2 16.7 V www.semtech.com SMDA05CN-5 THRU SMDA15CN-5 PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 10 110 90 % of Rated Power or IPP Peak Pulse Power - P PP (kW) 100 1 0.1 80 70 60 50 40 30 20 10 0 0.01 0.1 1 10 100 0 1000 25 50 Pulse Waveform 100 125 150 175 Clamping Voltage vs. Peak Pulse Current 35 110 Waveform Parameters: tr = 8µs td = 20µs 90 80 70 e 60 -t 50 40 Waveform Parameters: tr = 8µs td = 20µs 30 Clamping Voltage - VC (V) 100 Percent of IPP 75 Ambient Temperature - TA (oC) Pulse Duration - tp (µs) td = IPP/2 30 20 25 SMDA15CN-5 20 SMDA05CN-5 15 10 5 10 0 0 0 5 10 15 20 25 0 30 ã 2000 Semtech Corp. 2 4 6 8 10 12 14 16 18 20 22 24 Peak Pulse Current - IPP (A) Time (µs) 3 www.semtech.com SMDA05CN-5 THRU SMDA15CN-5 PROTECTION PRODUCTS Applications Information Device Connection Options for Protection of Four or Five Data Lines Protection for Four Bidirectional 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: From Connector 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. To Protected IC Protection for Five Bidirectional Lines From Connector 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 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. ã 2000 Semtech Corp. To Protected IC 4 www.semtech.com SMDA05CN-5 THRU SMDA15CN-5 PROTECTION PRODUCTS Outline Drawing - SO-8 Land Pattern - SO-8 ã 2000 Semtech Corp. 5 www.semtech.com SMDA05CN-5 THRU SMDA15CN-5 PROTECTION PRODUCTS Ordering Information Par t Numbe r Wo r king Vo ltage Qty p e r Reel R e e l Size SMDA 05CN -5.TB 5V 500 7 Inch SMDA 05CN -5.TE 5V 2,500 13 Inch SMDA 15CN -5.TB 15V 500 7 Inch SMDA 15CN -5.TE 15V 2,500 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 ã 2000 Semtech Corp. 6 www.semtech.com