SMS05C THRU SMS24C TVS Diode Array For ESD and Latch-Up Protection PROTECTION PRODUCTS Description Features u Transient protection for data lines to The SMS series of TVS arrays are designed to protect sensitive electronics from damage or latch-up due to ESD and other voltage-induced transient events. Each device will protect up to five lines. They are available with operating voltages of 5V, 12V, 15V and 24V. 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 crosssectional 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 SMS series devices may be used to meet the immunity requirements of IEC 61000-4-2, level 4. The low cost SOT23-6L package makes them ideal for use in portable electronics such as cell phones, PDAs, and notebook computers. u u u u u u IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 24A (8/20s) Small package for use in portable electronics Protects five I/O lines Working voltages: 5V, 12V, 15V and 24V Low leakage current Low operating and clamping voltages Solid-state silicon avalanche technology Mechanical Characteristics u u u u EIAJ SOT23-6L package Molding compound flammability rating: UL 94V-0 Marking : Marking Code Packaging : Tape and Reel per EIA 481 Applications u u u u u u u u u Circuit Diagram Cell phone Handsets and Accessories Microprocessor Based Equipment Personal Digital Assistants (PDAs) Notebooks, Desktops, and Servers Portable Instrumentation Set Top Box Peripherals MP3 Players Cordless Phones Schematic & PIN Configuration SOT23-6L (Top View) Revision 9/2000 1 www.semtech.com SMS05C THRU SMS24C PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbo l Value Units Peak Pulse Pow er (tp = 8/20s) Pp k 300 Watts Peak Pulse Current (tp = 8/20s) I PP 24 A Peak Forw ard Voltage (IF=1A, tp =8/20s) V FP 1.5 V Lead Soldering 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 SMS05C Par ame te r Symbo l Co nd itio ns Minimum Typ ical Maximum Units 5 V Reverse Stand-Off Voltage VRWM Reverse Breakdow n Voltage V BR It = 1mA Reverse Leakage Current IR VRWM = 5V, T=25C 20 A Clamp ing Voltage VC IPP = 5A, tp = 8/20s 9.8 V Clamp ing Voltage VC IPP = 24A, tp = 8/20s 14.5 V Junction Cap acitance Cj Betw een I/O Pins and Gnd V R = 0V, f = 1MHz 325 400 pF Symbo l Co nd itio ns Typ ical Maximum Units 12 V 6 V SMS12C Par ame te r Minimum Reverse Stand-Off Voltage VRWM Reverse Breakdow n Voltage V BR It = 1mA Reverse Leakage Current IR VRWM = 12V, T=25C 1 A Clamp ing Voltage VC IPP = 5A, tp = 8/20s 19 V Clamp ing Voltage VC IPP = 15A, tp = 8/20s 23 V Junction Cap acitance Cj Betw een I/O Pins and Gnd V R = 0V, f = 1MHz 150 pF a 2000 Semtech Corp. 2 13.3 V 135 www.semtech.com SMS05C THRU SMS24C PROTECTION PRODUCTS Electrical Characteristics (Continued) SMS15C Par ame te r Symbo l Co nd itio ns Minimum Typ ical Maximum Units 15 V Reverse Stand-Off Voltage VRWM Reverse Breakdow n Voltage V BR It = 1mA Reverse Leakage Current IR VRWM = 15V, T=25C 1 A Clamp ing Voltage VC IPP = 5A, tp = 8/20s 24 V Clamp ing Voltage VC IPP = 12A, tp = 8/20s 29 V Junction Cap acitance Cj Betw een I/O Pins and Gnd V R = 0V, f = 1MHz 100 125 pF Symbo l Co nd itio ns Typ ical Maximum Units 24 V 16.7 V SMS24C Par ame te r Minimum Reverse Stand-Off Voltage VRWM Reverse Breakdow n Voltage V BR It = 1mA Reverse Leakage Current IR VRWM = 24V, T=25C 1 A Clamp ing Voltage VC IPP = 5A, tp = 8/20s 40 V Clamp ing Voltage VC IPP = 8A, tp = 8/20s 44 V Junction Cap acitance Cj Betw een I/O Pins and Gnd V R = 0V, f = 1MHz 75 pF a 2000 Semtech Corp. 3 26.7 V 60 www.semtech.com SMS05C THRU SMS24C PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 110 10 Peak Pulse Power - PPP (kW) 100 % of Rated Power or IPP 90 1 0.1 80 70 60 50 40 30 20 10 0 0.01 0.1 1 10 100 0 1000 25 Pulse Waveform 75 100 125 150 Clamping Voltage vs. Peak Pulse Current 110 45 Waveform Parameters: tr = 8s td = 20s 90 80 70 e 60 -t 50 40 Waveform Parameters: tr = 8s td = 20s 40 Clamping Voltage - V C (V) 100 Percent of IPP 50 Ambient Temperature - TA (oC) Pulse Duration - tp ( s) td = IPP/2 30 SMS24C 35 30 SMS15C 25 SMS12C 20 15 SMS05C 10 20 5 10 0 0 0 5 10 15 20 25 0 30 5 10 15 20 25 30 Peak Pulse Current - IPP (A) Time (s) Forward Voltage vs. Forward Current 5 Forward Voltage - V F (V) 4.5 4 3.5 3 2.5 2 1.5 Waveform Parameters: tr = 8s td = 20s 1 0.5 0 0 5 10 15 20 25 30 35 40 45 Forward Current - IF (A) a 2000 Semtech Corp. 4 www.semtech.com SMS05C THRU SMS24C PROTECTION PRODUCTS Applications Information Device Connection for Protection of Five Data Lines SMSxxC Circuit Diagram The SMSxxC is designed to protect up to five unidirectional data lines. The device is connected as follows: 1. Unidirectional protection of five I/O lines is achieved by connecting pins 1, 3, 4, 5 and 6 to the data lines. Pin 2 is 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 Board Layout Recommendations for Suppression of ESD. Protection of Five Unidirectional Lines 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 SMSxxC near the input terminals or connectors to restrict transient coupling. Minimize the path length between the SMSxxC 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. a 2000 Semtech Corp. 5 www.semtech.com SMS05C THRU SMS24C PROTECTION PRODUCTS Outline Drawing Drawing -- SOT23-6L SO-8 Outline Land Pattern - SOT23-6L a 2000 Semtech Corp. 6 www.semtech.com SMS05C THRU SMS24C PROTECTION PRODUCTS Marking Codes Par t Numbe r Mar king Co d e SMS05C C05 SMS12C C12 SMS15C C15 SMS24C C24 Note: Pin 1 Identified with a dot. Ordering Information Par t Numbe r Wo r king Vo ltage Qty p e r Reel R e e l Size SMS05C.TC 5V 3,000 7 Inch SMS05C.TG 5V 10,000 13 Inch SMS12C.TC 12V 3,000 7 Inch SMS12CTG 12V 10,000 13 Inch SMS15C.TC 15V 3,000 7 Inch SMS15C.TG 15V 10,000 13 Inch SMS24C.TC 24V 3,000 7 Inch SMS24C.TG 24V 10,000 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. 7 www.semtech.com