document number: 84772 for technical questions, contact: emifilter@vishay.com www.vishay.com rev. 1.7, 14-sep-09 1 2-channel emi-filter with esd-protection vemi255a-hs3 vishay semiconductors marking (example only) dot = pin 1 marking yy = type code (see table below) xx = date code features ? ultra compact llp75-6a package ? 2-channel emi-filter and esd-protection ? low leakage current ? line resistance r s = 50 ? typical cut off frequency f 3db = 100 mhz ? esd-protection acc. iec 61000-4-2 30 kv contact discharge 30 kv air discharge ?e3 - sn ? compliant to rohs directive 2002/95/ec and in accordance to weee 2002/96/ec 19957 1 19499 1 2 3 65 4 21001 xx yy ordering information device name ordering code taped units per reel (8 mm tape on 7" reel) minimum order quantity vemi255a-hs3 VEMI255A-HS3-GS08 3000 15 000 vemi255a-hs3 VEMI255A-HS3-GS08 10 000 10 000 package data device name package name type code weight molding compound flammability rating moisture sensitivity level soldering conditions vemi255a-hs3 llp75-6a t1 5 mg ul 94 v-0 msl level 1 (according j-std-020) 260 c/10 s at terminals absolute maximum ratings parameter test conditions symbol value unit peak pulse current all i/o pin to pin 2; acc. iec 61000-4-5; t p = 8/20 s; single shot i ppm 4a esd immunity contact discharge acc. iec61000-4-2; 10 pulses v esd 30 kv air discharge acc. iec61000-4-2; 10 pulses 30 operating temperatur e junction temperature t j - 40 to + 125 c storage temperature t stg - 55 to + 150 c ** please see document ?vishay material category policy?: www.vishay.com/doc?99902
www.vishay.com for technical questions, contact: emifilter@vishay.com document number: 84772 2 rev. 1.7, 14-sep-09 vemi255a-hs3 vishay semiconductors 2-channel emi-filter with esd-protection application note with the vemi255a-hs3 2 different signal or data lines can be filtered and clamped to gr ound. due to the different clamping lev els in forward and reverse direction the clamping behavior is bi directional and as ymmetric (bias). the 2 independent emi-filter are placed between pin 1 and pin 6, and pin 3 and pin 4. they all are connected to the common ground pin 2. pin 5 is inter nally not connected. each filter is symmetrical so that all po rts (pin 1, 3, 4, and 6) can be used as input or output. the circuit diagram of one emi- filter-channel shows two identical z-diodes at th e input to ground and the output to ground. the se z-diodes are characterized by the breakthrough voltage level (v br ) and the diode capacitance (c d ). below the breakthrough voltage level the z-diodes can be considered as capacito rs. together with these capacito rs and the line resistance r s between input and output the device works as a low pass filter. low frequency signals (f < f 3db ) pass the filter while high frequency signals (f > f 3db ) will be shorted to ground through the diode capacitances c d . each filter is symmetrical so that bot h ports can be used as input or output. 19420 l1 i n l2 i n l1 out l2 out 1 9500 1 2 3 6 5 4 19421 r s o u t (pin 4, 6) in (pin 1, 3) g n d (pin 2) c d 210 8 5 c d c d
document number: 84772 for technical questions, contact: emifilter@vishay.com www.vishay.com rev. 1.7, 14-sep-09 3 vemi255a-hs3 2-channel emi-filter with esd-protection vishay semiconductors note ratings at 25 c, ambient temper ature unless otherwise specified. typical characteristics t amb = 25 c, unless otherwise specified fig. 1 - esd discharge current wave form acc. iec 61000-4-2 (330 /150 pf) fig. 2 - 8/20 s peak pulse current wave form acc. iec 61000-4-5 electrical characteristics vemi255a-hs3 parameter test conditions/remarks symbol min. typ. max. unit protection paths number of ch annels which can be protected n channel - - 2 channel reverse stand off voltage at i r = 1 a each input to pin 2 v rwm 5- -v reverse current at v r = 5 v each input to pin 2 i r --1a reverse break down voltage each input to pin 2 at i r = 1 ma v br 6- -v pos. clamping voltage at i pp = 1 a applied at the input, measured at the output; acc. iec 61000-4-5 v c-out --7.8v at i pp = i ppm = 4 a applied at the input, measured at the output; acc. iec 61000-4-5 v c-out --8v neg. clamping voltage at i pp = - 1 a applied at the input, measured at the output; acc. iec 61000-4-5 v c-out - 1 - - v at i pp = i ppm = - 4 a applied at the input, measured at the output; acc. iec 61000-4-5 v c-out - 1.2 - - v input capacitance at v r = 0 v; f = 1 mhz c in -60-pf at v r = 2.5 v; f = 1 mhz c in -37-pf esd-clamping voltage at 30 kv esd-pulse acc. iec 61000-4-2 v cesd -7.5- v line resistance measured between input and output; i s = 10 ma r s 45 50 55 cut-off frequency v in = 0 v; measured in a 50 system f 3db - 100 - mhz 0 % 20 % 40 % 60 % 8 0 % 100 % 120 % - 10 0 10 20 30 40 50 60 70 8 0 90 100 time (ns) discharge c u rrent i esd rise time = 0.7 ns to 1 ns 53 % 27 % 20557 0 % 20 % 40 % 60 % 8 0 % 100 % 010203040 time ( s) i ppm 20 s to 50 % 8 s to 100 % 2054 8
www.vishay.com for technical questions, contact: emifilter@vishay.com document number: 84772 4 rev. 1.7, 14-sep-09 vemi255a-hs3 vishay semiconductors 2-channel emi-filter with esd-protection fig. 3 - typical forward current i f vs. forward voltage v f fig. 4 - typical input voltage v in vs. input current i in fig. 5 - typical peak clamping voltage v c vs. peak pulse current i pp fig. 6 - typical input capacitance c in vs. input voltage v in fig. 7 - typical small signal transmission (s21) at z o = 50 0.5 0.6 0.7 0. 8 0.9 1 0.001 v f ( v ) i f (ma) 210 8 4 0.01 0.1 1 10 100 filter o u tp u t not connected v i n ( v ) i i n ( a) 8 7 6 5 4 3 2 1 0 0.01 0.1 1 10 100 1000 10 000 10571 v c at inp u t v c at o u tp u t meas u red acc. iec 61000-4-5 ( 8 /20 s - w a v e form). s u rge p u lse applied at the filter inp u t. 0123456 12 10 8 6 4 2 0 v c ( v ) i pp (a) 19572 f = 1 mhz 01 23 45 70 60 50 40 30 20 10 0 v i n ( v ) c i n (pf) 19570 v i n put = 0 v v i n put = 5 v meas u red in a 50 system 1 10 100 1000 10 000 0 - 5 - 10 - 15 - 20 - 25 - 30 - 35 - 40 fre qu ency (mhz) transmission (s21) (db) 19569
document number: 84772 for technical questions, contact: emifilter@vishay.com www.vishay.com rev. 1.7, 14-sep-09 5 vemi255a-hs3 2-channel emi-filter with esd-protection vishay semiconductors package dimensions in millimeter s (inches): llp75-6a 1.05 (0.041) 0.95 (0.037) heat sink 0.3 (0.012) 0.2 (0.00 8 ) 0.3 (0.012) 0.2 (0.00 8 ) 0.3 (0.012) 0.2 (0.00 8 ) 0.5 (0.020) 0.6 (0.024) 0.25 (0.010) 0.55 (0.022) 0.45 (0.01 8 ) pin 1 marking 1.65 (0.065) 1.55 (0.061) 0. 8 (0.031) 0.7 (0.02 8 ) 0.05 (0.002) 0 (0.000) 0.2 (0.00 8 ) 1.65 (0.065) 1.55 (0.061) 0.5 (0.020) 0.5 (0.020) 0.3 (0.012) 0.3 (0.012) 0.15 (0.006) 0.15 (0.006) 0.5 (0.020) 0.5 (0.020) 1 (0.039) 0.25 (0.010) doc u ment no.:s 8 - v -3906.02-001 (4) re v . b - date: 12. jan u ary 2006 1 8 05 8 created - date: 20. decem b er 2004 foot print recommendation: solder resist mask solder pad 1 (0.039) 1 (0.039)
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