slvu2.8-8 ultra low capacitance tvs array 1 05181.r3 3/07 www.protekdevices.com applications ? ethernet - 10/100/1000 base t ? cellular phones ? audio/video inputs ? handheld electronics ? personal digital assistant (pda) iec compatibility (en61000-4) ? 61000-4-2 (esd): air - 15kv, contact - 8kv ? 61000-4-4 (eft): 40a - 5/50ns ? 61000-4-5 (surge): 24a, 8/20s - level 2(line-ground) & level 3(line-line) features ? 600 watts peak pulse power per line (tp = 8/20s) ? provides protection for four line pairs ? esd protection > 40 kilovolts ? low leakage current < 1.0a ? ultra low capacitance: 6pf typical ? rohs compliant mechanical characteristics ? molded jedec so-8 ? weight 70 milligrams (approximate) ? available in lead-free pure-tin plating(annealed) ? solder reflow temperature: pure-tin - sn, 100: 260-270c ? consult factory for leaded device availability ? flammability rating ul 94v-0 ? 12mm tape and reel per eia standard 481 ? marking: marking code, logo, date code & pin one defined by dot on top of package 05181 pin configuration so-8
slvu2.8-8 2 05181.r3 3/07 www.protekdevices.com device characteristics electrical characteristics per line @ 25c unless otherwise specified peak pulse current (tp = 8/20s) symbol v alue 260 c amps 30 units i pp i frm parameter lead soldering temperature peak pulse power (tp = 8/20s) - see fig. 1 p pp 600 watts maximum ratings @ 25c unless otherwise specified operating temperature t l -55 to 150 c storage temperature t stg -55 to 150 c 17 typical capacitance (see note 1) @0v, 1mhz c pf 1.0 6 maximum leakage current (see note 1) @v wm i d a note 1: device measured between pin 1 to 2, pin 3 to 4, pin 5 to 6 and pin 7 to 8. 8.5 5.5 maximum clamping voltage (see note 1) (see fig. 2) minimum snapback voltage (see note 1) @i sb = 50ma v sb volts 2.8 3.0 2.8 sl8 slvu2.8-8 part number device marking rated stand-off voltage (see note 1) v wm volts minimum breakdown voltage (see note 1) @ 1ma v (br) volts @i pp = 2a v c volts @i pp = 5a v c volts @i pp = 24a v c volts @i pp = 30a v c volts 15 0.1 1 10 100 1,000 10,00 0 t d - pulse duration - s 500w 8/20s waveform 10 100 1,000 10,000 p pp - peak pulse power - watts figure 1 peak pulse power vs pulse time 0 5 10 15 20 25 30 t - time - s 0 20 40 60 80 100 120 i pp - peak pulse current - % of i pp test waveform parameters t f = 8s t d = 20s t f peak value i pp e -t t d = t i pp /2 figure 2 pulse wave form
slvu2.8-8 3 05181.r3 3/07 www.protekdevices.com graphs 0 25 50 75 100 125 150 t l - lead temperature - c 20 40 60 80 100 % of rated power peak pulse power 8/20s average power figure 3 power derating curve 0 figure 4 typical clamping voltage vs peak pulse current 0 5 10 15 20 25 30 i pp - peak pulse current a v c - clamping voltage - v 20 16 12 8 4 0
slvu2.8-8 4 05181.r3 3/07 www.protekdevices.com electronic equipment is susceptible to damage caused by electrostatic discharge (esd), electrical fast transients (eft), and te rtiary lightning effects. knowing that equipment can be damaged, the slvu2.8-8 was designed to provide the level of protection required to safe guard sen sitive equipment. this product can be used in different configurations to provide a level of protection to meet bidirectional requirements either in a common-mode or differential-mode configuration. bidirectional common-mode configuration (figure 1) the slvu2.8-8 provides up to four lines of protection in a common-mode configuration as depicted in figure 1. circuit connectivity is as follows: ? line 1 is connected to pin 1 ? line 2 is connected to pin 8 ? line 3 is connected to pin 5 ? line 4 is connected to pin 4 ? pins 2, 3, 6 and 7 are connected to ground bidirectional differential-mode configuration (figure 2) the slvu2.8-8 provides up to four line paris of protection in a differential-mode configura- tion as depicted in figure 2. circuit connectivity is as follows: ? line pair 1 is connected to pins 1 & 2 ? line pair 2 is connected to pins 3 & 4 ? line pair 3 is connected to pins 7 & 8 ? line pair 4 is connected to pins 5 & 6 circuit board la yout recommenda tions circuit board layout is critical for electromagnetic compatibility (emc) protection. the following guidelines are recommended: ? the protection device should be placed near the input terminals or connectors, the device will divert the transient current immediately before it can be coupled into the nearby traces. ? the path length between the tvs device and the protected line should be minimized. ? all conductive loops including power and ground loops should be minimized. ? the transient current return path to ground should be kept as short as possible to reduce parasitic inductance. ? ground planes should be used whenever possible. for multilayer pcbs, use ground vias. figure 2. bidirectional differential-mode protection figure 1. bidirectional common-mode protection application note
slvu2.8-8 5 05181.r3 3/07 www.protekdevices.com so-8 package outline & dimensions outline & dimensions: rev 1 - 11/01, 06009 tape & reel/bulk ordering nomenclature 1. surface mount product is taped and reeled in accordance with eia-481. 2. suffix-t7 = 7 inch reel - 1,000 pieces per 12mm tape, i.e. slvu2.8-8-t7. 3. suffix-t13 = 13 inch reel - 2,500 pieces per 12mm tape, i.e., slvu2.8-8-t13. 4. suffix - lf = lead-free, pure-tin plating, i.e., slvu2.8-8-lf-t7. 5. no suffix = product shipped in tubes of 98 pcs per tube. a b c d f g j k p r 4.80 3.80 1.35 0.35 0.40 1.27 bsc 0.18 0.10 5.80 0.25 5.00 4.00 1.75 0.49 1.250 1.27 bsc 0.25 0.25 6.20 0.50 0.189 0.150 0.054 0.014 0.016 0.05 bsc 0.007 0.004 0.229 0.010 0.196 0.157 0.068 0.019 0.049 0.05 bsc 0.009 0.008 0.244 0.019 dim min max min max millimeters inches package dimensions notes 1. - t - = seating plane and datum surface. 2. dimensions ?a? and ?b? are datum. 3. dimensions ?a? and ?b? do not include mold protrusion. 4. maximum mold protrusion is 0.015? (0.380 mm) per side. 5. dimensioning and tolerances per ansi y14.5m, 1982. 6. dimensions are exclusive of mold flash and metal burrs.
package outline so-8 !" # mounting pad copyright ? prot ek devices 2007 specifications: protek reserves the right to change the electrical and or mechanical characteristics described herein without notice (except jedec). design changes: protek reserves the right to discontinue product lines without notice, and that the final judgement concerning selection and specifications is the buyer?s and that in furnishing engineering and technical assistance, protek assumes no responsibility with respect to the s election or specifications of such products. protek devices 2929 south fair lane, tempe, az 85282 tel: 602-431-8101 fax: 602-431-2288 e-mail: sales@protekdevices.com web site: www.protekdevices.com
|
