SM05 Low Capacitance Quad Line ESD Protection Diode Array SM05 SOT23-3 General Description The SM05 of transient voltage suppressors (TVS) are designed to protect components which are connected to data and transmission lines from voltage surges caused by electrostatic discharge (ESD). 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 dual-junction common-anode design allows the user to protect one bidirectional data line or two unidirectional lines. The low profile SOT23 package allows flexibility in the design of “crowded” circuit boards. The SM05 will meet the surge requirements of IEC 61000-4-2 (Formerly IEC801-2), Level 4, “Human Body Model” for air and contact discharge. Applications Features Cellular Handsets and Accessories Portable Electronics Industrial Controls Set-Top Box Servers, Notebook and Desktop PC Pin Configurations Transient Protection for Data & Power Lines to IEC 61000-4-2 (ESD) ±15kV (Air), ±8kV (Contact) Protects One Bidirectional Line or Two Unidirectional Lines Working Voltages: 5V Low Clamping Voltage Solid-State Silicon Avalanche Technology Top View M: Month Code SM05 SOT23-3 ___________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 1/6 SM05 Ordering Information Part Number Working Voltage Packaging Type Channel Marking Code SM05 5.0V SOT23-3 2 S05 Shipping Qty 3000pcs/7Inch Tape & Reel Absolute Maximum Ratings RATING SYMBOL VALUE UNITS Peak Pulse Power (tp = 8/20μs) PPK 300 Watts Thermal Resistance, Junction to Ambient θJA 325 °C/W Lead Soldering Temperature TL 260(10 sec.) °C Operating Temperature TJ -55 to +125 °C TSTG -55 to +125 °C Storage Temperature - Electrical Characteristics PARAMETER Reverse Stand-Off Voltage Reverse Breakdown Voltage SYMBOL CONDITIONS MIN TYP VRWM 5 V 7.2 V μA It = 1mA Reverse Leakage Current IR VRWM = 5V, T=25°C 0.1 IPP = 5A, tp = 8/20μs 9.8 Clamping Voltage VC IPP = 17A, tp = 8/20μs 17.6 tp = 8/20μs Pin 1 to 2 VR = 0V, f = 1MHz Pin 1 to 3 and Pin 2 to 3 VR = 0V, f = 1MHz 17 25 pF 50 pF IPP >2A 0.55 0.35 Ω IPP Junction Capacitance CJ Junction Capacitance CJ Reverse dynamic resistance Forward dynamic resistance Rdyn,rev Rdyn,fwd 6.8 UNIT VBR Peak Pulse Current 6 MAX V A ___________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 2/6 SM05 Typical Operating Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Clamping Voltage vs. Peak Pulse Current 10 18 16 Clamping Voltage - Vc(V) Peak Pulse Power - Ppk(kW) 17 1 0.1 15 14 13 12 11 10 Waveform parameters: tr=8uS td=20uS 9 8 7 0.01 0.1 6 1 10 Pulse Duration - tp(uS) 100 1000 0 2 4 6 8 10 12 14 16 Peak Pulse Current - Ipp(A) ___________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 3/6 SM05 Typical Operating Circuits Detailed Description Device Connection Options The SM05 is designed to protect one bidirectional or two unidirectional data or I/O lines operating at 5 volts. Connection options are as follows: Bidirectional: Pin 1 is connected to the data line and pin 2 is connected to ground (Since the device is symmetrical, these connections may be reversed). The ground connection should be made directly to a ground plane. The path length should be kept as short as possible to minimize parasitic inductance. Pin 3 is not connected. Unidirectional: Data lines are connected to pin 1 and pin 2. Pin 3 is connected to ground. For best results, this pin should be connected directly to a ground plane on the board. The path length should be kept as short as possible to minimize parasitic inductance. Circuit Board Layout Recommendations for Suppression of ESD Good circuit board layout is critical for the suppression of fast rise-time transients such as ESD. The following guidelines are recommended (Refer to application note SI99-01 for more detailed information): 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. ___________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 4/6 SM05 Package Information SM05: SOT23-3 Outline Drawing D θ b Symbol 0.2 E E1 3 2 L1 L 1 e e1 c Top View A A1 A2 End View Side View A A1 A2 b c D E E1 e e1 L L1 θ DIMENSIONS MILLIMETERS Min Max 1.050 1.250 0.000 0.100 1.050 1.150 0.300 0.500 0.100 0.200 2.820 3.020 1.500 1.700 2.650 2.950 0.950REF 1.800 2.000 0.550REF 0.300 0.600 0° 8° INCHES Min Max 0.041 0.049 0.000 0.004 0.041 0.045 0.012 0.020 0.004 0.008 0.111 0.119 0.059 0.067 0.104 0.116 0.037REF 0.071 0.079 0.022REF 0.012 0.024 0° 8° 2.02 0.80 Land Pattern NOTES: 1. Compound dimension: 2.92×1.60； 2. Unit: mm; 3. General tolerance ±0.05mm unless otherwise specified; 4. The layout is just for reference. 1.90 S05 M Tape and Reel Orientation ___________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 5/6 SM05 IMPORTANT NOTICE The information in this document has been carefully reviewed and is believed to be accurate. Nonetheless, this document is subject to change without notice. Union assumes no responsibility for any inaccuracies that may be contained in this document, and makes no commitment to update or to keep current the contained information, or to notify a person or organization of any update. Union reserves the right to make changes, at any time, in order to improve reliability, function or design and to attempt to supply the best product possible. Union Semiconductor, Inc Add: Unit 606, No.570 Shengxia Road, Shanghai 201210 Tel: 021-51093966 Fax: 021-51026018 Website: www.union-ic.com ___________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 6/6