document number: 83820 www.vishay.com revision 17-august-01 3?5 features dual channel (lh1501) l/o isolation, 3750 v rms typical r on 20 ? load voltage 350 v load current 150 ma high surge capability linear, ac/dc operation clean bounce free switching low power consumption smd lead available on tape and reel agency approvals ul?ile no. e52744 csa?erti?ation 093751 bsi applications general telecom switching ? on/off hook control ?ring delay ?dial pulse ?ground start ? ground fault protection instrumentation industrial controls description the lh1521 dual 1 form b relays are spst normally closed switches that can replace electromechanical relays in many applications. the relays are con- structed as a mult.-chip hybrid device. actuation con- trol is via an infrared led. the output switch is a combination of a photodiode array with mosfet switches and control circuity. part identi?ation part number description lh1521bb 8-pin dip, tubes lh1521bac 8-pin smd, gullwing, tubes LH1521BACTR 8-pin smd, gullwing, tape and reel .380 (9.65) .318 (8.08) .100 (2.54) .360 (9.14) .250 (6.35) .018 (.46) 6-.031 (6-.80) dia. .100 (2.54) .300 (7.62) .300 (7.62) .250 (6.35) .285 (7.24) typ. .130 (3.30) .300 (7.62) .360 (9.14) typ. .380 (9.65) .318 (8.08) .100 (2.54) .375 (9.53) .250 (6.35) .018 (.46) .175 (4.45) .130 (3.30) .025 (.64) typ. .010 (.25) typ. .300 (7.62) .059 (1.50) .075 (1.90) .327 (8.31) .100 (2.54) package dimensions in inches (mm) dip smd 8765 12 34 s2' s2' s2 s2 s1 s1 s1' s1' lh1521bb/bac/bactr dual 1 form b state relay
document number: 83820 www.vishay.com revision 17-august-01 3?6 absolute maximum ratings, t a =25 c stresses in excess of the absolute maximum ratings can cause permanent damage to the device. these are absolute stress ratings only. functional oper- ation of the device is not implied at these or any other conditions in excess of those given in the operational sections of this document. exposure to absolute maximum ratings for extended periods of time can adversely affect reliability. ambient temperature range ( t a ) .................................... ?0 to +85 c storage temperature range ( t stg ) ................................. ?0 to +125 c pin soldering temperature (t=10 s max) ( t s ) ............................. 260 c input/output isolation voltage (t=1.0 s, i iso =10 a max) ( v iso ) ....................................... 3750 v rms pole-to-pole isolation voltage (s1 to s2)* (dry air, dust free, at sea level) ................................................. 1600 v led continuous forward current ( i f ) .........................................50 ma led reverse voltage ( i r 10 a) ( v r )........................................... 5.0 v dc or peak ac load voltage ( i l 50 a) ( v l ) .............................. 350 v continuous dc load current ( i l ) one pole operating.................................................................150 ma two poles operating ...............................................................110 ma peak load current (t=100 ms) (single shot) ( i p ) ......................400 ma output power dissipation (continuous) ( p diss )........................ 600 mw * breakdown occurs between the output pins external to the package. recommended operating conditions both relays on with equal load currents. for a single relay operation, refer to lh1501 recommended operating conditions graph. 90 0 50 150 120 30 ?40 ?20 0 20 40 60 80 load current (ma) ambient temperature ( c) 5.0 ma electrical characteristics, t a =25 c minimum and maximum values are testing requirements. typical values are characteristics of the device and are the result of engineering evaluations. typical values are for information only and are not part of the testing requirements. parameter sym. min. typ. max. units test conditions input led forward current, switch turn-on i fon 0.2 0.9 ma i l =?50 ma, t=10 ms led forward current, switch turn-off i foff 1.0 2.0 ma v l ?00 v led forward voltage v f 1.15 1.22 1.45 v i f =10 ma output on-resistance r on ?025 ? i f =0 ma, i l =50 ma off-resistance r off 0.1 1.4 g ? i f =5.00 ma, v l =?00 v off-state leakage current 0.08 1.0 a i f =5.0 ma, v l =?50 v output capacitance 50 i f =5.0 ma, v l =50 v transfer input/output capacitance c iso 3.0 pf v iso =1.0 v turn-on time t on 2.0 3.0 ms i f =5.0 ma, i l =50 ma turn-off time t off 1.0 3.0 ms i f =5.0 ma, i l =50 ma
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