Varistor Products Surface Mount Multilayer Varistors (MLVs) > MHS Series RoHS MHS Varistor Series Description The Multilayer High–Speed MHS Series is a very-low capacitance extension to the Littelfuse ML family of transient voltage surge suppression devices available in an 0402 and 0603–size surface mount chip. Their small size is ideal for high–density printed circuit boards, being typically applied to protect intergrated circuits and other sensitive components. They are particularly well suited to suppress ESD events including those specified in IEC 61000-4-2 or other standards used for Electromagnetic Compliance (EMC) testing. Size Table Metric EIA 1005 0402 1608 0603 The MHS Series is manufactured from semiconducting ceramics and is supplied in a leadless, surface mount package. The MHS Series is also compatible with modern reflow and wave soldering prcesses. Littelfuse Inc. manufactures other multilayer varistor series products, see the ML, MLE, MLN and AUML Series data sheets. Applications Features • Data, Diagnostic I/O Ports • Mobile Communications • AEC - Q200 compliant • RoHS compliant • Universal Serial Bus (USB) • Computer/DSP Products • • Video & Audio Ports • • Portable/HandHeld Products Industrial Instruments Including Medical 3pF, 12pF, and 22pF capacitance versions suitable for high–speed data rate lines • • EFT/B rated to IEC 61000-4-4 (Level 4) • Low leakage currents • -55ºC to +125ºC operating temp. range • Inherently bi-directional ESD rated to IEC 61000-4-2 (Level 4) Absolute Maximum Ratings • For ratings of individual members of a series, see device ratings and specifications table. Continuous MHS Series Units ≤ 42 V Steady State Applied Voltage: DC Voltage Range (VM(DC)) : V0402/0603MHS03 V0402/0603MHS12 ≤ 18 V V0402/0603MHS22 ≤ 09 V Operating Ambient Temperature Range (TA) -55 to +125 O C Storage Temperature Range (TSTG) -55 to +150 O C ©2010 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/MHS.html for current information. MHS Varistor Series Revision: June 28, 2010 MHS Series The MHS Series provides protection from ESD and EFT in high–speed data line and other high frequency applications. The low capacitance of the MHS Series permits usage in analog or digital circuits where it will not attenuate or distort the desired signal or data. Varistor Products Surface Mount Multilayer Varistors (MLVs) > MHS Series Device Ratings and Specifications Performance Specifications (25 ºC) Maximum Clamping Voltage At 1A (8X20μs) Part Number Typical Typical Leakage Typical Inductance Current at Specified Capacitance at (from Impedance DC Voltage 1MHz (1V p-p) Analysis) 3.5V 5.5V C (Note 4) L P IL MIN MAX Maximum ESD Clamp Voltage (Note 1) 8kV Contact (Note 2) Clamp 15kV AIR (Note 3) Clamp (Vc) (V) (V) (μA) (μA) (pF) (pF) (nH) V0402MHS03N (Note 5) 135 <300 <400 0.5 1.00 2 5 <1.0 V0603MHS03N 135 <300 <400 0.5 1.00 1 6 <1.0 V0402MHS12N (Note 5) 55 <125 <160 0.5 1.00 8 16 <1.0 V0603MHS12N 55 <125 <160 0.5 1.00 8 16 <1.0 30 <125 <160 0.5 1.00 15 29 <1.0 30 <65 <100 0.5 1.00 15 29 <1.0 V0402MHS22N (Note 5) V0603MHS22N NOTES: 1. Tested to IEC-61000-4-2 Human Body Model (HBM) discharge test circuit. 2. Direct discharge to device terminals (IEC preferred test method). 3. Corona discharge through air (represents actual ESD event). 4. Capacitance may be customized, contact your Littelfuse Sales Representative. 5. V0402MHSxxx (0402 size devices) available as "R" packaging option only. Example: V0402MHS03NR. See Packaging and Tape and Reel sections (last page) for additional information. Standby Current at Normalized Varistor Voltage and Temperature Peak Current and Energy Derating Curve For applications exceeding 125ºC ambient temperature, the peak surge current and energy ratings must be reduced as shown below. NORMALIZED VARISTOR VOLTAGE (V) 1.2 PERCENT OF RATED VALUE 100 80 60 40 1.0 0.8 25O 0.6 85O 0.4 125O 0.2 0.0 20 0.0001 0.001 0.01 50 60 70 80 90 100 110 120 0.1 1 CURRENT (mA) Figure 2 0 -55 130 140 150 AMBIENT TEMPERATURE ( oC) Figure 1 Insertion Loss (S21) Characteristics Nominal Voltage Stability to Multiple ESD Impulses (8kV Contact Discharges per IEC 61000-4-2) 0 INSERTION LOSS (dB) NOMINAL VOLTAGE AT 1mADC 60 V0402MHS03 V0603MHS03 50 40 30 -20 V0402MHS22 V0603MHS22 -30 V0402MHS22 V0603MHS22 10 Figure 3 V0402MHS03 V0603MHS03 V0402MHS12 V0603MHS12 20 0 V0402MHS12 V0603MHS12 -10 10 Figure 4 1 10 100 1000 100 1000 10000 FREQUENCY (MHz) 10000 Number of Pulses ©2010 Littelfuse, Inc. MHS Varistor Series Revision: June 28, 2010 Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/MHS.html for current information. Varistor Products Surface Mount Multilayer Varistors (MLVs) > MHS Series Device Characteristics Speed of Response At low current levels, the V-I curve of the multilayer transient voltage suppressor approaches a linear (ohmic) relationship and shows a temperature dependent effect. At or below the maximum working voltage, the suppressor is in a high resistance model (approaching 106Ω at its maximum rated working voltage). Leakage currents at maximum rated voltage are below 100μA, typically 25μA; for 0402 size below 20μA, typically 5μA. The Multilayer Suppressor is a leadless device. Its response time is not limited by the parasitic lead inductances found in other surface mount packages. The response time of the ZNO dielectric material is less than 1ns and the MLE can clamp very fast dV/dT events such as ESD. Additionally, in “real world” applications, the associated circuit wiring is often the greatest factor effecting speed of response. Therefore, transient suppressor placement within a circuit can be considered important in certain instances. Typical Temperature Dependance of the Characteristic Curve in the Leakage Region Multilayer Internal Construction METAL ELECTRODES METAL END TERMINATION DEPLETION 25 10% 1E -9 Figure 5 1E -8 o REGION 50o 75o 1E -7 100o 125 oC 1E -6 1E -5 1E -4 1E -3 DEPLETION 1E -2 Figure 6 SUPPRESSOR CURRENT (ADC) REGION GRAINS Lead (Pb) Soldering Recommendations The principal techniques used for the soldering of components in surface mount technology are IR Re-flow and Wave soldering. Typical profiles are shown on the right. Reflow Solder Profile The recommended solder for the MHS suppressor is a 62/36/2 (Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb). Littelfuse also recommends an RMA solder flux. 230 Wave soldering is the most strenuous of the processes. To avoid the possibility of generating stresses due to thermal shock, a preheat stage in the soldering process is recommended, and the peak temperature of the solder process should be rigidly controlled. When using a reflow process, care should be taken to ensure that the MHS chip is not subjected to a thermal gradient steeper than 4 degrees per second; the ideal gradient being 2 degrees per second. During the soldering process, preheating to within 100 degrees of the solder's peak temperature is essential to minimize thermal shock. Figure 7 Wave Solder Profile Once the soldering process has been completed, it is still necessary to ensure that any further thermal shocks are avoided. One possible cause of thermal shock is hot printed circuit boards being removed from the solder process and subjected to cleaning solvents at room temperature. The boards must be allowed to cool gradually to less than 50ºC before cleaning. Figure 8 ©2010 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/MHS.html for current information. MHS Varistor Series Revision: June 28, 2010 MHS Series FIRED CERAMIC DIELECTRIC VNOM VALUE AT 25 oC (%) SUPPRESSOR VOLTAGE IN PERCENT OF 100% Varistor Products Surface Mount Multilayer Varistors (MLVs) > MHS Series Lead–free (Pb-free) Soldering Recommendations Littelfuse offers the Nickel Barrier Termination finish for the optimum Lead–free solder performance. Lead–free Re-flow Profile The preferred solder is 96.5/3.0/0.5 (SnAgCu) with an RMA flux, but there is a wide selection of pastes and fluxes available with which the Nickel Barrier parts should be compatible. MAXIMUM TEMPERATURE 260˚C 20 - 40 SECONDS WITHIN 5˚C RAMP RATE <3˚C/s The reflow profile must be constrained by the maximums in the Lead–free Reflow Profile. For Lead–free wave soldering, the Wave Solder Profile still applies. 60 - 150 SEC > 217˚C PREHEAT ZONE Note: the Lead–free paste, flux and profile were used for evaluation purposes by Littelfuse, based upon industry standards and practices. There are multiple choices of all three available, it is advised that the customer explores the optimum combination for their process as processes vary considerably from site to site. 5.0 6.0 7.0 Figure 10 Product Dimensions (mm) PAD LAYOUT DEMENSIONS CHIP LAYOUT DIMENSIONS E D L W Note: Avoid metal runs in this area, parts are not recommended for use in applications using Silver (Ag) epoxy paste. Dimension 0402 Size IN 0603 Size MM IN MM A 0.067 1.700 0.100 2.540 B 0.020 0.510 0.030 0.760 C 0.024 0.610 0.035 0.890 D (max.) 0.024 0.600 0.040 1.000 E 0.10 +/- 0.006 0.25 +/- 0.15 0.015 +/- 0.008 0.4 +/- 0.2 L 0.039 +/- 0.004 1.00 +/- 0.10 0.063 +/- 0.006 1.6 +/- 0.15 W 0.020 +/- 0.004 0.50 +/- 0.10 0.032 +/- 0.006 0.8 +/- 0.15 ©2010 Littelfuse, Inc. MHS Varistor Series Revision: June 28, 2010 Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/MHS.html for current information. Varistor Products Surface Mount Multilayer Varistors (MLVs) > MHS Series Part Numbering System V 0402 MHS 03 N R PACKING OPTIONS (See quantities in Packaging section) T = (0603 device only)13in (330mm) Diameter Reel, Plastic Carrier Tape H = (0603 device only) 7in (178mm) Diameter Reel, Plastic Carrier Tape R = (available for 0402 and 0603 devices) 7in (178mm) Diameter Reel, Paper Carrier Tape DEVICE FAMILY Littelfuse TVSS Device DEVICE SIZE 0402 = .04 inch x .02 inch (1.0 mm x 0.5 mm) 0603 = .063 inch x .031 inch (1.6 mm x 0.8 mm) END TERMINATION OPTION N = Nickel Barrier (Ni/Sn) CAPACITANCE DESIGNATION 03 = 3pF 12 = 12pF 22 = 22pF SERIES DESIGNATOR MHS = Multilayer Hi-Speed Packaging* Device Size 7 Inch Reel ("H" Option) MHS Series Quantity 13 Inch Reel ("T" Option) 7 Inch Reel ("R" Option) 0603 10,000 2,500 4,000 0402 not available not available 10,000 *(Packaging) It is recommended that parts be kept in the sealed bag provided and that parts be used as soon as possible when removed from bags. Tape and Reel Specifications D0 T P0 P2 E F K0 W B0 T1 D1 P1 Symbol A0 Dimensions in Millimeters Description 0402 Size 0603 Size A0 Width of Cavity Dependent on Chip Size to Minimize Rotation. B0 Length of Cavity Dependent on Chip Size to Minimize Rotation. K0 Depth of Cavity Dependent on Chip Size to Minimize Rotation. W Width of Tape 8 -/+ 0.2 8 -/+ 0.3 F Distance Between Drive Hole Centers and Cavity Centers 3.5 -/+.05 3.5 -/+.05 1.75 -/+ 0.1 1.75 -/+ 0.1 2 -/+ 0.05 4 -/+ 0.1 E Distance Between Drive Hole Centers and Tape Edge P1 Distance Between Cavity Centers P2 Axial Drive Distance Between Drive Hole Centers & Cavity Centers 2 -/+ 0.1 2 -/+ 0.1 P0 Axial Drive Distance Between Drive Hole Centers 4 -/+ 0.1 4 -/+ 0.1 D0 Drive Hole Diameter 1.55 -/+ 0.05 1.55 -/+ 0.05 D1 Diameter of Cavity Piercing N/A 1.05 -/+ 0.05 T1 Top Tape Thickness 0.1 Max 0.1 Max T Nominal Carrier Tape Thickness 1.1 1.1 Notes: • Conforms to EIA-481-1, Revision A • Can be supplied to IEC publication 286-3 ©2010 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/MHS.html for current information. MHS Varistor Series Revision: June 28, 2010