40 staticguard avx multilayer ceramic transient voltage suppressors esd protection for cmos, bi polar and sige based systems ? typical esd failure voltage for cmos and/or bi polar is 200v. ? 15kv esd pulse (air discharge) per iec 1000-4-2, level 4, generates < 20 millijoules of energy. ? low capacitance (<200pf) is required for high-speed data transmission. ? low leakage current (i l ) is necessary for battery operated equipment. general information termination/lead finish code packaging code staticguard avx working working clamping test maximum transient peak typical case elements part number voltage voltage voltage current leakage energy current cap size (dc) (ac) for v c current rating rating vc04lc18v500 _ _ 18.0 14.0 50 1 10 0.02 15 40 0402 1 vc06lc18x500 _ _ 18.0 14.0 50 1 10 0.05 30 50 0603 1 vc08lc18a500 _ _ 18.0 14.0 50 1 10 0.10 30 80 0805 1 VC12LC18A500 _ _ 18.0 14.0 50 1 10 0.10 30 200 1206 1 va10lc18a500 _ _ 18.0 14.0 50 1 10 0.10 30 200 axial 1 v w (dc) dc working voltage (v) v w (ac) ac working voltage (v) v c clamping voltage (v @ i vc ) i vc test current for v c (a, 8x20s) i l maximum leakage current at the working voltage (a) e t transient energy rating (j, 10x1000s) i p peak current rating (a, 8x20s) cap typical capacitance (pf) @ frequency specified and 0.5 v part number identification v c 08 lc 18 a 500 r p termination finish: p = ni/sn alloy (plated) packaging (pcs/reel) clamping voltage energy rating working voltage (0-18vdc) low capacitance design case size designator case style product designator v a 10 lc 18 a 500 r l lead finish: l = copper clad steel, solder coated packaging (pcs/reel) clamping voltage energy rating working voltage (0-18vdc) low capacitance design case size designator case style product designator chips axials not rohs compliant lead-free compatible component for rohs compliant products, please select correct termination style.
41 staticguard avx multilayer ceramic transient voltage suppressors esd protection for cmos, bi polar and sige based systems vc08lc18a500 capacitance histogram 14% 12% 10% 8% 6% 4% 2% 0% 14% 12% 10% 8% 6% 4% 2% 0% capacitance (pf) measured data calculated distribution 1mhz, 0.5vrms 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 vc06lc18x500 capacitance histogram 30% 20% 25% 15% 5% 10% 0% capacitance (pf @ 1mhz & 0.5v) measured data calculated 45 50 55 60 65 vc06lc18x500 vc08lc18a500 VC12LC18A500 0 -10 -20 -30 -40 db 0 500 1000 1500 2000 2500 frequency (mhz) 50 45 40 35 30 1 10 100 1000 10000 number of esd strikes clamping voltage (v) VC12LC18A500 vc08lc18a500 vc06lc18x500 staticguard esd response? iec 1000-4-2 (8 kv contact discharge) vi curves - staticguard products 100 80 60 40 20 0 10 -9 10 -6 10 -3 10 +0 10 +3 current (a) voltage (v) 06lc 08lc 12lc 10lc VC12LC18A500 capacitance histogram 14% 12% 10% 8% 6% 4% 2% 0% 14% 12% 10% 8% 6% 4% 2% 0% capacitance (pf) measured data calculated distribution 1mhz, 0.5vrms 161 163 165 167 169 171 173 175 177 179 181 183 185 187 189 staticguard s21 typical performance data
42 staticguard avx multilayer ceramic transient voltage suppressors multilayer construction and improved grain structure result in excellent transient clamping characteristics up to 20 amps peak current, while maintaining very low leakage currents under dc operating conditions. the vi curves below show the voltage/current characteristics for the 5.6v, 9v, 14v, 18v and low capacitance staticguard parts with currents ranging from parts of a micro amp to tens of amps. traditionally varistors have suffered degradation of electrical performance with repeated high current pulses resulting in decreased breakdown voltage and increased leakage cur- rent. it has been suggested that irregular intergranular boundaries and bulk material result in restricted current paths and other non-schottky barrier paralleled conduction paths in the ceramic. repeated pulsing of transguard ? tran- sient voltage suppressors with 150amp peak 8 x 20s waveforms shows negligible degradation in breakdown voltage and minimal increases in leakage current. this does not mean that transguard ? suppressors do not suffer degradation, but it occurs at much higher current. typical performance curves (0402 chip size) voltage/current characteristics pulse degradation vc04lc18v500 vc040214x300 vc040218x400 vc040205x150 vc040209x200 100 80 60 40 20 0 10 -9 10 -7 10 -5 10 -3 10 -1 10 10 3 10 5 current (a) voltage (v) vc04lc18v500 vc040214x300 vc040218x400 vc040205x150 vc040209x200 10 100 1000 10000 8kv esd strikes breakdown voltage (vb) 35 30 25 20 15 10 5 vc040205x vc04lc18v vc040214x vc040218x vc040209x 0 -5 -10 -15 -20 -25 0.01 0.1 1 10 frequency (ghz) db vc04lc18v500 vc040214x300 vc040218x400 vc040205x150 vc040209x200 1300 1200 10 100 1000 impulse duration ( s) peak power (w) 1100 1000 900 800 700 600 500 400 300 200 100 0 peak power vs pulse duration insertion loss characteristics esd test of 0402 parts
|
