Esd Suppression Design Guide Page 3 ESD Suppression Design Guide

Protection Technology Data Rate Span Peak/ Clamp (8kV) ESD Level Discrete Options Array Options Applications and Circuits Key Advantages Multilayer Varistor (MLVs) < 125Mbps Good 0402 0603 0805 1206 Keypad/switch, audio, analog video, USB1.1, RS232 Lowest cost; broad discrete offering TVS Diode Arrays (SPA Diodes) 0 - > 5Gbps Excellent 0805 (SOD323) 0402 (SOD882, SOD-883, SOD723) 0201 (Flipchip, DFN-2) 01005 (Flipchip), 1103-DFN, 0802-DFN SOIC-8 SOT143 SOT23 SC70 SOT553 SOT563 SOT953 MSOP 8 MSOP 10 DFN TDFN Keypad/switch, USB1.1, USB2.0, USB3.0, USB3.1 Type C, audio, analog video, FireWire 1394, HDMI, Ethernet, MMC interface, LCD module.. RS232, RS485, CAN, LIN Lowest peak and clamp voltages PULSE-GUARD ESD Suppressors 100Mbps -> 5Gbps Good 0201 0402 0603 SOT23 USB2.0, FireWire 1394, HDMI/USB3.0, RF antenna Lowest capacitance ESD Suppresion Design Guide 2016 Littelfuse ESD Suppression Design Guide ESD Suppression Technologies When to Choose PULSE-GUARD ESD Suppressors The application tolerates very little added capacitance (high speed data lines or RF circuits) ESD is the only transient threat Protection is required on data, signal, and control lines (not power supply lines) When to ChooseTVS Diode Arrays (SPA Diodes) The device being protected requires the lowest possible clamp voltage, low capacitance (0.1pF-400pF) and low leakage (0.01A - 10A) Board space is at a premium and space-savings multi-line protection is needed Transients other than ESD, such as EFT or lightning, must also be considered When to Choose Multilayer Varistors (MLVs) Surge currents or energy beyond ESD is expected in the application (EFT, lightning) Added capacitance is desirable for EMI filtering (3pF - 6000pF) Power supply line or low/medium speed data and signal lines are to be protected The operating voltage is above silicon or PULSE-GUARD ESD suppressor ratings 2

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