5?02 LH1529 optically coupled telecom switch preliminary data sheet features solid state relay and optocoupler in one package package?ingle 8 pin dip l/o isolation, 3750 v rms surface mount option optocoupler ? bidirectional current detection solid-state relay ? typical ron 20 w ? load voltage 350 v ? load current 120 ma ? current limit protection ? high surge capability ? linear, ac/dc operation ? clean bounce free switching ? low power consumption ? high reliability monolithic receptor applications general telecom switching ? on/off hook control ?dial pulse ? ring current detection ? loop current sensing description the LH1529 telecom switch consists of an optically coupled solid state relay (ssr) and a bidirectional input optocoupler. the ssr is ideal for performing switchhook and dial-pulse switching while the optocoupler performs ring detection and loop current sensing functions. both the ssr and opto cou- pler provide 3750 v rms of input to ouput isolation. the ssr is integrated on a monolithic receptor die using high voltage bcdmos technology. the ssr features low on- resistance, high breakdown voltage and current-limit cir- cuitry that protects the relay from telephone line induced lightning surges. the optocoupler provides bidirectional current sensing via two antiparallel gaas infrared emitting diodes. the opto channel provides a minimum ctr of 33% at 6 ma. the LH1529 comes in a 8 pin, plastic dip. to order packages with ??bend leads, specify LH1529x00s. absolute maximum ratings package ambient temperature range................................. ?0 to +85 c storage temperature range ............................... ?0 to +150 c soldering temperature (t=10 sec. max.)......................... 260 c isolation test voltage................................................ 3750 v rms isolation resistance v io =500 v, t a =25 c................................................... 3 10 12 w v io =500 v, t a =100 c................................................. 3 10 11 w total power dissipation ................................................. 600 mw ssr led continuous forward current.....................................50 ma led reverse voltage (i r 10 m a)........................................... 8 v dc or peak ac load voltage (i l 50 m a)........................... 350 v continous dc load current ...........................................120 ma optocoupler led continuous forward current.....................................50 ma led reverse voltage (i r 10 m a)........................................... 3 v collector to emitter breakdown voltage .............................. 30 v phototransistor power dissipation................................. 150 mw package dimensions in inches (mm) a1 k2 c3 e4 5a/k 6a/k 7s 8s pin one i.d. .268 (6.81) .255 (6.48) 3 4 6 5 .390 (9.91) .379 (9.63) .045 (1.14) .030 (.76) 4 typ. .100 (2.54) typ. 10 typ. 3 ? .305 typ. (7.75) typ. .022 (.56) .018 (.46) .012 (.30) .008 (.20) .135 (3.43 ) .115 (2.92 ) 1 2 8 7 .150 (3.81) .130 (3.30) .040 (1.02) .030 (.76 ) ??bend leads: package dimensions in inches (mm) .100 (2.54) typ. .480 (12.19) .460 (11.68) .260 (6.60) .240 (6.10) .055 (1.40) .045 (1.14) typ. .050 (1.27) .040 (1.01) .150 (3.81) .130 (3.30) .340 (8.64) .320 (8.13) .065 (1.65) .045 (1.14) .019 (.48) .009 (.23) .065 (1.65) ref. .079 (2.01) ref. .15 (.38 ) .008 (.20 ) .400 (10.16) .380 (9.65) .040 (1.02) .030 (.76) pin 1 ident. .4 pins
5?03 LH1529 electrical characteristics (t a =25 ) parameter symbol min. typ. max. unit test condition ssr led forward current for switch turn-on i fon 0.7 2.0 ma i l =100 ma, t=10 ms led forward current for switch turn-off i foff 0.2 0.6 ma v l = 300 v led forward voltage v f 1.15 1.26 1.45 v i f =10 ma on-resistance r on 12 20 25 w i f =5 ma,i l = 50 ma off-resistance r off 5000 g w i f =0 ma, v l = 100 v current limit i limit 170 210 250 ma i f =5 ma, t=5 ms output off-state leakage current 0.02 200 1.0 na m a i f =0 ma, v l = 100 v i f =0 ma, v l = 350 v output capacitance pins 7 to 8 55 10 pf pf i f =0 ma, v l =1 v i f =0 ma, v l =50 v turn-on time t on 1.3 2.5 ms i f =5 ma, i l =50 ma turn-off time t off 0.6 2.5 ms i f =5 ma, i l =50 v optocoupler led forward voltage v f 0.9 1.2 1.5 v i f =10 ma dc current transfer ratio ctr 33 165 % i f =6.0 ma, v ce =0.5 v saturation voltage v cesat .07 0.5 v i f =16.0 ma, i c =2 ma dark current leakage i ceo 500 na i f =0 ma, v ce =5 v trickle current leakage i ceo 1 m ai f =5 m a, v ce =5 v figure 1. recommended operating conditions figure 2. led forward current vs. forward voltage 85 60 35 10 -15 -40 0 50 100 150 ambient temperature in c load current in ma 5-20 ma i fon =2 ma 3 ma 4 ma 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0 20 40 60 80 100 120 v f - input led forward voltage i f forward current in ma 25 c 85 c figure 3. typical ssr current vs. voltage figure 4. change in on=resistance vs. led current 4 2 0 -2 -4 -200 -100 0 100 200 ssr terminal voltage terminal current in ma 20 18 16 14 12 10 8 6 4 2 0 -0.5 0.0 0.5 1.0 1.5 i f - led current in ma ( ? r/r) ratio of on-resistance i l =50 ma normalized by on resistance @ 25 c
5?04 LH1529 figure 5. change in on-resistance vs. temp. figure 6. turn-on current vs. temperature figure 7. current limit vs. temperature figure 8. ssr turn-on time vs. resistive load 80 60 40 20 0 -20 -40 -40 -20 0 20 40 ambient temperature in c ( ? r/r) in % i l =50 ma normalized by r on @ 25 c 80 60 40 20 20 0.5 1.0 1.5 2.0 2.5 ambient temperature in c normalized turn on current normalized against i ft value @ 25 c 80 60 40 20 0 -20 -40 -40 -30 -20 -10 0 10 20 30 40 ambient temperature in c i lmt in % i f =5 ma t=5 ms vl=see elec.char 10 8 6 4 2 0 0.8 1.0 1.2 1.4 1.6 1.8 r load in k ton ssr turn on time in ms 2ma 4ma 6ma 8.5ma v cc =5v figure 9. collector current vs. collector voltage figure 10. collector current vs. collector voltage figure 11. i ceo leakage current vs. temperature figure 12. non-saturated current transfer ratio 5 4 3 2 1 0 0 10 20 30 40 v ce -collector to emitter voltage i c -collector current in ma i f =20 ma i f =10 ma i f =1 ma
80 70 60 50 40 30 20 20 .1 1 10 100 1000 ambient temperature in c iceo-leakage current in ma i f =0 ma i f =5 a 100 10 1 .1 .01 0.0 0.2 0.4 0.6 0.8 1.0 1.2 led-forward current in ma normalized ctr 85 c 25 c normalized against ctr value @ i f =10 ma, v ce =5v, t a = 25 c 100 10 1 .1 .01 0.0 0.2 0.4 0.6 0.8 1.0 1.2 normalized ctr 85 c 25 c normalized against ctr value @ i f =10 ma v ce =0.5 v, t a =25 c figure 13. switching test circuit for ssr channel v in rs v s 1k + _ 1 2 8 7 vo i l figure 14. switching waveform control input switch output 90% 10% t on t off t r 1 m s t r 1 m s i l i f
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