1 ?2012 littelfuse, inc. specifcations are subject to change without notice. please refer to www.littelfuse.com/spa for current information. tvs diode arrays (spa ? family of products) revision: february 15, 2012 slvu2.8-4 series slvu2.8-4 lightning surge protection - slvu2.8-4 series description features applications the slvu2.8-4 was designed to protect low voltage, cmos devices from esd and lightning induced transients. there is a compensating diode in series with each low voltage tvs to present a low loading capacitance to the line being protected. these robust structures can safely absorb repetitive esd strikes at 30kv (contact discharge) per iec61000-4-2 standard and each structure can safely dissipate up to 40a (iec61000-4-5, t p =8/20s) with very low clamping voltages. pinout functional block diagram ? esd, iec61 000-4-2, 30kv contact, 30kv air ? eft, iec61 000-4-4, 40a (5/50ns) ? lightning , iec61 000-4-5, 40a (8/20s) ? l ow capacit ance of 2pf per line ? l ow leakage cur rent of 1a (max) at 2.8v ? soic-8 (jedec mo-0 12) pin confguration allows f or simple fow-through layout ? 10/100/1000 ethernet ? wan/lan equipment ? switching s ystems ? desktops, ser vers, and notebooks ? analog inputs ? base st ations 56 78 43 21 pin 1. 3 pin 2.4 pin 6.8 pin 5.7 rohs pb green application example et hernet ph y j1 j8 rj -4 5 co nn ecto r slvu2.8-4 device is shown as transparent for actual footprint case gnd tx+ tx- rx+ rx- slvu2.8-4 series 2.8v 40a tvs array
?2012 littelfuse, inc. specifcations are subject to change without notice. please refer to www.littelfuse.com/spa for current information. 2 tvs diode arrays (spa ? family of products) revision: february 15, 2012 slvu2.8-4 series lightning surge protection - slvu2.8-4 series absolute maximum ratings parameter rating units peak pulse power (t p =8/20s) 600 w peak pulse current (t p =8/20s) 40 a operating temperature -40 to 85 oc storage temperature -60 to 150 oc electrical characteristics (t op = 25c) parameter symbol test conditions min typ max units reverse standoff voltage v rwm i r 1a 2.8 v reverse breakdo wn volt age v br i t =2a 3.0 v snap b ack volt age v sb i t =50ma 2.8 v reverse leakage current i leak v r =2.8v (each line) 1 a clamping voltage 1 v c i pp =5a, t p =8/20s (each line) 7. 0 8.5 v clamping voltage 1 v c i pp =24a, t p =8/20s (each line) 13.9 15.0 v esd withst and volt age 1 v esd iec61000-4-2 (contact) 30 kv iec61000-4-2 (air) 30 kv dynamic resistance r dyn (v c2 - v c1 ) / (i pp2 - i pp1 ) (each line) 0.4 diode capacitance 1 c d v r =0v, f=1mhz (each line) 2.0 2.5 pf caution: stresses above those listed in absolute maximum ratings may cause permanent damage to the device. this is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specifcation is not implied. note: 1 parameter is guaranteed by design and/or device characterization. figure 2: clamping voltage vs. i pp figure 1: capacitance vs. reverse voltage figure 3: pulse waveform 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0.0 0.5 1.0 1.5 2.0 2.5 dc bias (v) capacitance (pf) 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110% 0.0 5.0 10.0 15.0 20.0 25.0 30.0 time (s) percent of i pp 0 2 4 6 8 10 12 14 05 10 15 20 25 peak pulse current-i pp (a) clamping voltage-v c (v)
3 ?2012 littelfuse, inc. specifcations are subject to change without notice. please refer to www.littelfuse.com/spa for current information. tvs diode arrays (spa ? family of products) revision: february 15, 2012 slvu2.8-4 series slvu2.8-4 lightning surge protection - slvu2.8-4 series ti me temperature t p t l t s(max) t s(min) 25 t p t l t s time to peak temperature preheat p rehea t ramp-up r amp-up ramp-down r amp-d o critical zone t l to t p c ritical zon e t l to t p refow condition pb C f ree assembly p re heat - temperature min (t s(min) ) 150c - temperature max (t s(max) ) 200c - time (min to max) (t s ) 60 C 180 secs average ramp up rate (liquidus) temp (t l ) to peak 5c/second max t s(max) to t l - ramp-up rate 5c/second max refow - temperature (t l ) (liquidus) 217c - temperature (t l ) 60 C 150 seconds peak temperature (t p ) 260 +0/-5 c time within 5c of actual peak temperature (t p ) 20 C 40 seconds ramp-down rate 5c/second max time 25c to peak temperature (t p ) 8 minutes max. do not exceed 260c soldering parameters package dimensions mechanical drawings and recommended solder pad outline package soic-8 pins 8 jedec ms-012 millimetres inches min max min max a 1.35 1.75 0.053 0.069 a1 0.10 0.25 0.004 0.010 a2 1.25 1.65 0.050 0.065 b 0.31 0.51 0.012 0.020 c 0.17 0.25 0.007 0.010 d 4.80 5.00 0.189 0.197 e 5.80 6.20 0.228 0.244 e1 3.80 4.00 0.150 0.157 e 1.27 bsc 0.050 bsc l 0.40 1.27 0.016 0.050 o recommended soldering pad outline (reference only) f l product characteristics lead plating matte tin lead material copper alloy lead coplanarity 0.0004 inches (0.102mm) substitute material silicon body material molded epoxy flammability ul 94 v-0 notes : 1. all dimensions are in millimeters 2. dimensions include solder plating. 3. dimensions are exclusive of mold fash & metal burr. 4. all specifcations comply to jedec spec mo-203 issue a 5. blo is f acing up f or mold and f acing do wn f or trim/f orm, i.e. re verse trim/f orm. 6. package surface matte fnish vdi 11-13.
?2012 littelfuse, inc. specifcations are subject to change without notice. please refer to www.littelfuse.com/spa for current information. 4 tvs diode arrays (spa ? family of products) revision: february 15, 2012 slvu2.8-4 series lightning surge protection - slvu2.8-4 series ordering information part number package marking min. order qty. sl vu2.8-4btg soic-8 u2.8-4 2500 part numbering system part marking system slvu2.8 b t g series package b = soic-8 no. of channels t= tape & reel -4 g= green u2.8-4 u 2.8 product series u = slvu2.8 voltage level -4 no. of channels embossed carrier tape & reel speci?cation soic package user f eeding direc tion pin 1 location symbol millimetres inches min max min max e 1.65 1.85 0.065 0.073 f 5.4 5.6 0.213 0.22 p2 1.95 2.05 0.077 0.081 d 1. 5 1. 6 0.059 0.063 d1 1.50 min 0.059 min p0 3.9 4.1 0.154 0.161 10p0 40.0 +/- 0.20 1.574 +/- 0.008 w 11. 9 12.1 0.468 0.476 p 7. 9 8.1 0.311 0.319 a0 6.3 6.5 0.248 0.256 b0 5.1 5.3 0.2 0.209 k0 2 2.2 0.079 0.087 t 0.30 +/- 0.05 0.012 +/- 0.002
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