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description the hcpl-0370/3700 and hcpl-3760 are voltage/cur - rent threshold detection optocouplers. the hcpl-3760 is a low-current version of the hcpl-0370/3700. to obtain lower current operation, the hcpl-3760 uses a high-ef - ciency algaas led which provides higher light output at lower drive currents. the devices utilize threshold sens - ing input bufer ics which permit control of threshold levels over a wide range of input voltages with a single external resistor. the input bufer incorporates several features: hysteresis for extra noise immunity and switching immunity, a di - ode bridge for easy use with ac input signals, and inter - nal clamping diodes to protect the bufer and led from a wide range of over-voltage and over-current transients. because threshold sensing is done prior to driving the led, variations in optical coupling from the led to the detector will have no efect on the threshold levels. functional diagram hcpl-0370, hcpl-3700, hcpl-3760 isolated voltage/current detectors data sheet features ? standard (hcpl-0370/3700) and low input current (hcpl - 3760) versions ? ac or dc input ? programmable sense voltage ? hysteresis ? logic compatible output ? thresholds guaranteed over temperature ? thresholds independent of led optical parameters ? recognized under ul 1577 and csa approved for dielectric withstand proof test voltage of 3750 vac, 1 minute applications ? limit switch sensing ? low voltage detector ? ac mains and dc link voltage detection ? relay contact monitor ? relay coil voltage monitor ? current sensing ? microprocessor interfacing lead (pb) free rohs 6 fully compliant rohs 6 fully compliant options available; -xxxe denotes a lead-free product caution: it is advised that normal static precautions be taken in handling and assembly of this component to prevent damage and/or degradation which may be induced by esd. 1 2 3 4 8 7 6 5 hcpl-3700 functional diagram ac dc+ dc- ac v cc v o gnd truth table (positive logic) input h l output l h nc
2 the hcpl-0370/3700s input bufer ic has a nominal turn on threshold of 2.5 ma (i th +) and 3.7 volts (v th +). the bufer ic for the hcpl-3760 was redesigned to permit a lower input current. the nominal turn on threshold for the hcpl-3760 is 1.2 ma (i th +) and 3.7 volts (v th +). the high gain output stage features an open collector output providing both ttl compatible saturation voltages and cmos compatible break down voltages. by combining several unique functions in a single package, the user is provided with an ideal component for indus - trial control computer input boards and other applications where a pre deter mined input threshold level is desirable. to order, choose a part number from the part number column and combine with the desired option from the option column to form an order entry. example 1: hcpl-3760-500e to order product of gull wing surface mount package in tape and reel packaging with and rohs compliant. example 2: hcpl-3700 to order product of 300 mil dip package in tube packaging and non rohs compliant. option datasheets are available. contact your avago sales representative or authorized distributor for information. remarks: the notation #xxx is used for existing products, while (new) products launched since july 15, 2001 and rohs compliant will use Cxxxe. ordering information hcpl-0370/hcpl-3700/hcpl-3760 is ul recognized with 3750 vrms for 1 minute per ul1577 unless otherwise specifed. part number option package surface mount gull wing tape & reel ul 5000 vrms/1 minute iec/en/din en 60747-5-5 quantity rohs compliant non-rohs compliant hcpl- 0370 -000e no option so-8 x 100 per tube -500e -500 x x 1500 per reel -060e na x x 100 per tube -560e na x x x 1500 per reel hcpl- 3700 -000e no option 300 mil dip-8 50 per tube -300e #300 x x 50 per tube -500e #500 x x x 1000 per reel -020e -020 x 50 per tube -320e -320 x x x 50 per tube -520e -520 x x x x 1000 per reel -060e na x 50 per tube -360e na x x x 50 per tube -560e na x x x x 1000 per reel hcpl- 3760 -000e no option 300 mil dip-8 50 per tube -300e #300 x x 50 per tube -500e #500 x x x 1000 per reel -060e na x 50 per tube -360e na x x x 50 per tube -560e na x x x x 1000 per reel note: na = not available.
3 package outline drawings standard dip package (hcpl-3700/3760) 9.40 (0.370) 9.90 (0.390) 1.78 (0.070) max. 1.19 (0.047) max. a xxxx yyww date code 0.76 (0.030) 1.40 (0.056) 2.28 (0.090) 2.80 (0.110) 0.51 (0.020) min. 0.65 (0.025) max. 4.70 (0.185) max. 2.92 (0.115) min. dimensions in millimeters and (inches). note: floating lead protrusion is 0.25 mm (10 mils) max. 5 6 7 8 4 3 2 1 0.20 (0.008) 0.33 (0.013) 6.10 (0.240) 6.60 (0.260) 5 typ. 7.36 (0.290) 7.88 (0.310) 1 2 3 4 8 7 6 5 ac ac dc+ dc- gnd v cc nc v o pin one type number ul recognition ur 3.56 0.13 (0.140 0.005) schematic
4 package outline drawings, continued gull wing surface mount option 300 (hcpl-3700/3760) xxx yww 8 7 6 5 4 3 2 1 5.994 0.203 (0.236 0.008) 3.937 0.127 (0.155 0.005) 0.406 0.076 (0.016 0.003) 1.270 (0.050) bsc 5.080 0.127 (0.200 0.005) 3.175 0.127 (0.125 0.005) 1.524 (0.060) 45 x 0.432 (0.017) 0.228 0.025 (0.009 0.001) type number (last 3 digits) date code 0.305 (0.012) min. total package length (inclusive of mold flash) 5.207 0.254 (0.205 0.010) dimensions in millimeters (inches). lead coplanarity = 0.10 mm (0.004 inches) max. note: floating lead protrusion is 0.15 mm (6 mils) max. 0.203 0.102 (0.008 0.004) 7 pin one 0 ~ 7 * * 7.49 (0.295) 1.9 (0.075) 0.64 (0.025) land pattern recommendation 0.635 0.25 (0.025 0.010) 12 nom. 0.20 (0.008) 0.33 (0.013) 9.65 0.25 (0.380 0.010) 0.635 0.130 (0.025 0.005) 7.62 0.25 (0.300 0.010) 5 6 7 8 4 3 2 1 9.65 0.25 (0.380 0.010) 6.350 0.25 (0.250 0.010) 1.080 0.320 (0.043 0.013) 1.780 (0.070) max. 1.19 (0.047) max. 2.540 (0.100) bsc dimensions in millimeters (inches). tolerances (unless otherwise specified): lead coplanarity maximum: 0.102 (0.004) note: floating lead protrusion is 0.25 mm (10 mils) max. xx.xx = 0.01 xx.xxx = 0.005 a xxxx yyww date code type number ul recognition ur molded 1.016 (0.040) 1.27 (0.050) 10.9 (0.430) 2.0 (0.080) land pattern recommendation 3.56 0.13 (0.140 0.005) small outline so-8 package (hcpl-0370)
5 regulatory information the hcpl-0370/3700/3760 has been approved by the following organizations: solder refow thermal profle recommended pb-free ir profle note: non-halide fux should be used. note: non-halide fux should be used. 217 c ramp-down 6 c/sec. max. ramp-u p 3 c/sec. max . 150 - 200 c 260 +0/-5 c t 25 c to pea k 60 to 150 sec. 15 sec . time within 5 c of actual peak temperature t p t s preheat 60 to 180 sec. t l t l t smax t smin 25 t p time temperature notes: the time from 25 c to peak temperature = 8 minutes max. t smax = 200 c, t smin = 150 c iec/en/din en 60747-5-5 (with option 060) maximum working insulation voltage v iorm = 567 vpeak for hcpl-0370, and 630 vpeak for hcpl3700/3760. highest allowable overvoltage v iotm = 6000 vpeak for hcpl-0370/3700/3760. ul recognized under ul 1577, component recognition program, file e55361 (hcpl-0370 pending). csa approved under csa component acceptance notice #5, file ca 88324. 0 time (seconds) temperature (?c) 200 100 50 150 100 200 250 300 0 30 sec. 50 sec. 30 sec. 160?c 140?c 150?c peak temp. 245?c peak temp. 240?c peak temp. 230?c soldering time 200?c preheating time 150?c, 90 + 30 sec. 2.5?c 0.5?c/sec. 3?c + 1?c/e0.5?c tight typical loose room temperature preheating rate 3?c + 1?c/e0.5?c/sec. reflow heating rate 2.5?c 0.5?c/sec.
6 insulation and safety related specifcations parameter symbol 8-pin dip (300 mil) value so-8 value units conditions min.. external air gap (external clearance) l(io1) 7.1 4.9 mm measured from input terminals to output terminals, hortest distance through air min.. external tracking path (external creepage) l(io2) 7.4 4.8 mm measured from input terminals to output terminals, shortest distance path along body min.. internal plastic gap (internal clearance) 0.08 0.08 mm through insulation distance, conductor to conductor, usually the direct distance between the photoemitter and photodetector inside the optocoupler cavity tracking resistance (comparative tracking index) cti 200 200 v din iec 112/vde 0303 part 1 isolation group iiia material group (din vde 0110, 1/89, table 1) iec/en/din en 60747-5-5 insulation related characteristics [1] (with option 060) description symbol hcpl-0370 hcpl-3700/3760 units installation classifcation per din vde 0110/1.89, table 1 for rated mains voltage 150 v rms for rated mains voltage 300 v rms for rated mains voltage 600 v rms i-iv i-iv i-iii i-iv i-iv i-iii climatic classifcation 55/85/21 55/85/21 pollution degree (din vde 0110/1.89) 2 2 maximum working insulation voltage v iorm 567 630 v peak input to output test voltage, method b v iorm x 1.875 = v pr , 100% production test with tm = 1 sec partial discharge < 5 pc v pr 1063 1181 v peak input to output test voltage, method a v iorm x 1.6 = v pr , type and sample test, tm = 10 sec, partial discharge < 5 pc v pr 907 1008 v peak highest allowable overvoltage (transient overvoltage, tini = 60 sec) v iotm 6000 6000 v peak safety limiting values (maximum values allowed in the event of a failure) case temperature input current [2] output power [2] t s i s,input p s,output 150 150 600 175 230 600 c ma mw insulation resistance at t s , v io = 500 v r s 109 109 w notes: 1. insulation characteristics are guaranteed only within the safety maximum ratings, which must be ensured by protective circuits within the application. 2. safety-limiting parameters are dependent on case temperature. the input current, i s,input , derates linearly above 25c free-air case temperature at a rate of 1.2 ma/c and 1.53 ma/c for hcpl-0370 and hcpl-3700/3760 respectively; the output power, p s,output , derates linearly above 25c free-air case temperature at a rate of 4.8 mw/c and 4 mw/c for hcpl-0370 and hcpl-3700/3760 respectively.
7 recommended operating conditions parameter symbol min. max. units note supply voltage v cc 2 18 v operating temperature t a 0 70 c operating frequency f 0 4 khz 8 absolute maximum ratings (no derating required up to 70c) parameter symbol min. max. units note storage temperature t s -55 125 c operating temperature t a -40 85 c lead soldering cycle temperature 260 c 1 time 10 s input current average 50 2 surge i in 140 ma 2, 3 transient 500 input voltage (pins 2-3) v in -0.5 v input power dissipation hcpl-3700/3760 p in 230 mw 4 hcpl-0370 172 total package power dissipation hcpl-3700/3760 p t 305 mw 5 hcpl-0370 275 output power dissipation hcpl-3700/3760 p o 210 mw 6 hcpl-0370 103 output current average i o 30 ma 7 supply voltage (pins 8-5) v cc -0.5 20 v output voltage (pins 6-5) v o -0.5 20 v solder refow temperature profle see package outline drawings section
8 electrical specifcations over recommended temperature t a = 0c to 70c, unless otherwise specifed. parameter sym. device min. typ. [9] max. units conditions fig. note input threshold current i th+ hcpl-0370/3700 1.96 2.5 3.11 ma v in = v th+ ; v cc = 4.5 v; v o = 0.4 v; i o 4.2 ma 2, 3 14 hcpl-3760 0.87 1.2 1.56 i th- hcpl-0370/3700 1.00 1.3 1.62 v in = v th- ; v cc = 4.5 v; v o = 2.4 v; i oh 100 a hcpl-3760 0.43 0.6 0.80 input threshold voltage dc (pins 2, 3) v th+ 3.35 3.7 4.05 v v in = v 2 - v 3 ; pins 1 & 4 open v cc = 4.5 v; v o = 0.4 v; i o 4.2 ma v th- 2.01 2.6 2.86 v v in = v 2 - v 3 ; pins 1 & 4 open v cc = 4.5 v; v o = 2.4 v; i o 100 a ac (pins 1, 4) v th+ 4.23 4.9 5.50 v v in = |v 1 - v 4 |; pins 2 & 3 open v cc = 4.5 v; v o = 0.4 v; i o 4.2 ma 14, 15 v th- 2.87 3.7 4.20 v v in = |v 1 - v 4 |; pins 2 & 3 open v cc = 4.5 v; v o = 2.4 v; i o 100 a hysteresis i hys hcpl-0370/3700 1.2 ma i hys = i th+ C i th- 2 hcpl-3760 0.6 v hys 1.2 v v hys = v th+ C v th- input clamp voltage v ihc1 5.4 6.0 6.6 v v ihc1 = v 2 - v 3 ; v 3 = gnd; i in = 10 ma; pins 1 & 4 connected to pin 3 1 v ihc2 6.1 6.7 7.3 v v ihc2 = |v 1 - v 4 |; |i in | = 10 ma; pins 2 & 3 open v ihc3 12.0 13.4 v v ihc3 = v 2 - v 3 ; v 3 = gnd; i in = 15 ma; pins 1 & 4 open v ilc -0.76 v v ilc = v 2 - v 3 ; v 3 = gnd; i in = -10 ma input current i in hcpl-0370/3700 3.0 3.7 4.4 ma v in = v 2 C v 3 = 5.0 v pins 1 & 4 open 5 hcpl-3760 1.5 1.8 2.2 bridge diode forward voltage v d1,2 hcpl-0370/3700 0.59 v i in = 3 ma hcpl-3760 0.51 i in = 1.5 ma v d3,4 hcpl-0370/3700 0.74 i in = 3 ma hcpl-3760 0.71 i in = 1.5 ma logic low output voltage v ol 0.1 0.4 v v cc = 4.5 v; i ol = 4.2 ma 5 14 logic high output current i oh 100 a v oh = v cc = 18 v 14 logic low supply current i ccl hcpl-0370/3700 1.2 4 ma v 2 C v 3 = 5.0 v; v o = open; 6 hcpl-3760 0.7 3 v cc = 5.0 v logic high supply current i cch 0.002 4 a v cc = 18 v; v o = open 4 14 input capacitance c in 50 pf f = 1 mhz; v in = 0 v, pins 2 & 3, pins 1 & 4 open
9 parameter sym. device min. typ. max. units test conditions fig. note propagation delay hcpl-0370/3700 4.0 time to logic low t phl 15.0 s r l = 4.7 k w , c l = 30 pf 10 at output hcpl-3760 4.5 7, 10 propagation delay hcpl-0370/3700 10.0 time to logic high t plh 40.0 s r l = 4.7 k w , c l = 30 pf 11 at output hcpl-3760 8.0 hcpl-0370/3700 20 output rise time t r s r l = 4.7 k w , c l = 30 pf (10-90%) hcpl-3760 14 8 hcpl-0370/3700 0.3 output fall time t f s r l = 4.7 k w , c l = 30 pf (90-10%) hcpl-3760 0.4 common mode i in = 0 ma, r l = 4.7 k w , transient immunity |cm h | 4000 v/s v o min = 2.0 v, v cm = 1400 v at logic high output 9, 11 12, 13 common mode hcpl-0370/3700 i in = 3.11 ma r l = 4.7 k w , transient immunity |cm l | 600 v/s v o max = 0.8 v, at logic low output hcpl-3760 i in = 1.56 ma v cm = 140 v switching specifcations t a = 25c, v cc = 5.0 v, unless otherwise specifed. package characteristics over recommended temperature t a = 0c to 70c, unless otherwise specifed. parameter sym. min. typ. [9] max. units conditions fig. note input-output momentary v iso 3750 v rms rh 50%, t = 1 min; 16, withstand voltage* t a = 25c 17 option 020 5000 18 input-output resistance r i-o 10 12 w v i-o = 500 vdc 16 input-output capacitance c i-o 0.6 pf f = 1 mhz; v i-o = 0 vdc *the input-output momentary withstand voltage is a dielectric voltage rating that should not be interpreted as an input-output continuous volt - age rating. for the continuous voltage rating refer to the iec/en/din en 60747-5-5 insulation characteristics table (if applicable), your equipment level safety specifcation, or avago application note 1074, optocoupler input-output endurance voltage.
10 notes: 1. measured at a point 1.6 mm below seating plane. 2. current into/out of any single lead. 3. surge input current duration is 3 ms at 120 hz pulse repetition rate. transient input current duration is 10 s at 120 hz pulse repetition rate. note that maximum input power, p in , must be observed. 4. derate linearly above 70c free-air temperature at a rate of 4.1 mw/c (hcpl-3700/3760) and 3.1 mw/c (hcpl-0370). maximum input power dissipation of 230 mw (hcpl-3700/3760) and 172 mw (hcpl-0370) allows an input ic junction temperature of 125c at an ambient tempera - ture of t a = 70c. excessive p in and t j may result in ic chip degradation. 5. derate linearly above 70c free-air temperature at a rate of 5.4 mw/c (hcpl-3700/3760) and 5 mw/c (hcpl-0370). 6. derate linearly above 70c free-air temperature at a rate of 3.9 mw/c (hcpl-3700/3760) and 1.9 mw/c (hcpl-0370). maximum output power dissipation of 210 mw (hcpl-3700/3760) and 103 mw (hcpl-0370) allows an output ic junction temperature of 125c at an ambient temperature of t a = 70c. 7. derate linearly above 70c free-air temperature at a rate of 0.6 ma/c. 8. maximum operating frequency is defned when output waveform pin 6 obtains only 90% of v cc with r l = 4.7 k w , c l = 30 pf using a 5 v square wave input signal. 9. all typical values are at t a = 25c, v cc = 5.0 v unless otherwise stated. 10. the t phl propagation delay is measured from the 2.5 v level of the leading edge of a 5.0 v input pulse (1 s rise time) to the 1.5 v level on the leading edge of the output pulse (see figure 10). 11. the t plh propagation delay is measured from the 2.5 v level of the trailing edge of a 5.0 v input pulse (1 s fall time) to the 1.5 v level on the trailing edge of the output pulse (see figure 10). 12. common mode transient immunity in logic high level is the maximum tolerable (positive) dv cm /dt on the leading edge of the common mode pulse, v cm , to insure that the output will remain in a logic high state (i.e., v o > 2.0 v). common mode transient immunity in logic low level is the maximum tolerable (negative) dv cm /dt on the trailing edge of the common mode pulse signal, v cm , to insure that the output will remain in a logic low state (i.e., v o < 0.8 v). see figure 11. 13. in applications where dv cm /dt may exceed 50,000 v/s (such as static discharge), a series resistor, r cc , should be included to protect the de - tector ic from destructively high surge currents. the recommended value for r cc is 240 y per volt of allowable drop in v cc (between pin 8 and v cc ) with a minimum value of 240 y. 14. logic low output level at pin 6 occurs under the conditions of v in ? v th+ as well as the range of v in > v thC once v in has exceeded v th+ . logic high output level at pin 6 occurs under the conditions of v in v th- as well as the range of v in < v th+ once v in has decreased below v th- . 15. ac voltage is instantaneous voltage. 16. device considered a two terminal device: pins 1, 2, 3, 4 connected together, and pins 5, 6, 7, 8 connected together. 17. in accordance with ul 1577, each optocoupler is proof tested by applying an insulation test voltage 4500 v rms for 1 second (leakage detection current limit, i i-o 5 a). 18. in accordance with ul 1577, each optocoupler is proof tested by applying an insulation test voltage 6000 v rms for 1 second (leakage detection current limit, i i-o 5 a). this test is performed before the 100% production test for partial discharge (method b) shown in the iec/ en/din en 60747-5-5 insulation characteristics table. figure 1. typical input characteristics, i in vs. v in (ac voltage is instantaneous value). figure 2. typical transfer characteristics. input signal device th+ thC input connection i th hcpl-0370/3700 2.5 ma 1.3 ma pins 2, 3 or 1, 4 hcpl-3760 1.2 ma 0.6 ma v th(dc) all 3.7 v 2.6 v pins 2, 3 v th(ac) all 4.9 v 3.7 v pins 1, 4
11 figure 5. typical input current, i in , and low level output voltage, v ol , vs. temperature. figure 6. typical logic low supply current vs. supply voltage. figure 4. typical high level supply current, i cch vs. temperature. figure 3. typical dc threshold levels vs. temperature. v th ? voltage threshold ? v t a ? temperature ? c 2.4 -20 4.2 0 4 0 60 1.8 3.4 3.8 -40 80 2.2 2.0 20 hcpl-0370/3700 2.6 2.8 3.0 3.2 3.6 4.0 1.4 3.2 0.8 2.4 2.8 1.2 1.0 1.6 1.8 2.0 2.2 2.6 3.0 i th ? current threshold ? ma i th+ v th- i th- v th+ v th ? voltage threshold ? v t a ? temperature ? c 2.4 -25 hcpl-3700 fig 3b 4.2 0 5 0 75 1.8 3.4 3.8 -40 85 2.2 2.0 25 hcpl-3760 2.6 2.8 3.0 3.2 3.6 4.0 0.7 1.6 0.4 1.2 1.4 0.6 0.5 0.8 0.9 1.0 1.1 1.3 1.5 i th ? current threshold ? ma v th+ i th+ v th- i th- i cch ? high level supply current ? a t a ? temperature ? c -25 hcpl-3700 fig 4 10 0 0 5 0 75 10 -5 10 -1 -40 85 10 -4 25 10 -3 10 -2 v cc = 18 v v o = open i in = 0 ma i cch i cch i in ? input current ? ma t a ? temperature ? c 1.2 -25 hcpl-3700 fig 5b 2.1 0 5 0 75 0.9 1.7 1.9 -40 85 1.1 1.0 25 hcpl-3760 1.3 1.4 1.5 1.6 1.8 2.0 60 240 0 160 200 40 20 80 100 120 140 180 220 v ol ? low level output voltage ? mv v in = 5.0 v (pins 2, 3) v cc = 5.0 v i in v cc = 5.0 v i ol = 4.2 ma v ol i in ? input current ? ma t a ? temperature ? c 2.4 -20 4.2 0 4 0 60 1.8 3.4 3.8 -40 80 2.2 2.0 20 hcpl-0370/3700 2.6 2.8 3.0 3.2 3.6 4.0 60 240 0 160 200 40 20 80 100 120 140 180 220 v ol ? low level output voltage ? mv v in = 5.0 v (pins 2, 3) v cc = 5.0 v i in v cc = 5.0 v i ol = 4.2 ma v ol i ccl ? logic low supply current ? ma v cc ? supply voltage ? v 2.50 2.00 6.0 4.00 8.0 12.0 14.0 0 3.00 3.50 4.0 20.0 18.0 1.50 1.00 0.50 10.0 16.0 hcpl-0370/3700 i ccl ? logic low supply current ? ma v cc ? supply voltage ? v 1.50 6.0 hcpl-370 fig 6b 3.00 8.0 12.0 14.0 0 2.00 2.50 4.0 20.0 18.0 1.00 0.50 10.0 16.0 hcpl-3760
12 figure 7. typical propagation delay vs. temperature. figure 8. typical rise, fall times vs. temperature. figure 9. common mode transient immunity vs. common mode transient amplitude. t p ? propagation delay ? s t a ? temperature ? c 6 -20 24 0 4 0 60 0 16 20 -40 80 4 2 20 hcpl-0370/3700 8 10 12 14 18 22 r l = 4.7 k c l = 30 pf v cc = 5.0 v v in = t plh 5.0 v 1 ms pulse width f = 100 hz t r , t f = 1 s (10-90%) t phl t p ? propagation delay ? s t a ? temperature ? c 6 -25 hcpl-3700 fig 7b 24 0 5 0 75 0 16 20 -40 85 4 2 25 hcpl-3760 8 10 12 14 18 22 r l = 4.7 k c l = 30 pf v cc = 5.0 v v in = t plh 5.0 v 1 ms pulse width f = 100 hz t r , t f = 1 s (10-90%) t phl t r ? rise time ? s t a ? temperature ? c -20 60 0 4 0 60 0 40 50 -40 80 10 20 hcpl-0370/3700 20 30 r l = 4.7 k c l = 30 pf v cc = 5.0 v v in = t r 5.0 v 1 ms pulse width f = 100 hz t r , t f = 1 s (10-90%) 600 0 400 500 100 200 300 t f ? fall time ? ns t f t r ? rise time ? s t a ? temperature ? c -25 hcpl-3700 fig 8b 30 0 5 0 75 0 20 25 -40 85 5 25 hcpl-3760 10 15 r l = 4.7 k c l = 30 pf v cc = 5.0 v v in = t f 5.0 v 1 ms pulse width f = 100 hz t r , t f = 1 s (10-90%) t r t f ? fall time ? ns 700 100 500 600 200 300 400 cm ? common mode transient immunity ? v/ s v cm ? common mode transient amplitude ? v 400 5000 800 1600 0 3000 4000 0 2000 500 1200 1000 2000 v cc = 5.0 v i in = 0 ma v oh = 2.0 v r l = 4.7 k t a = 25 c cm l cm h v cc = 5.0 v i in = 3.11 ma (0370/3700) i in = 1.53 ma (3760) v ol = 0.8 v r l = 4.7 k t a = 25 c
13 figure 12. typical external threshold characteristics, v vs. r x . figure 10. switching test circuit. figure 11. test circuit for common mode transient immunity and typical waveforms.
for product information and a complete list of distributors, please go to our website: www.avagotech.com avago, avago technologies, and the a logo are trademarks of avago technologies in the united states and other countries. data subject to change. copyright ? 2005-2009 avago technologies. all rights reserved. obsoletes av01-0542en av02-2107en - september 2, 2009 electrical considerations the hcpl-0370/3700/3760 optocoup lers have internal temperature compen sated, predictable volt age and cur - rent threshold points which allow selection of an exter - nal resistor, r x , to determine larger external threshold voltage levels. for a desired external threshold voltage, v , a corre sponding typical value of r x can be ob tained from figure 12. specifc calculation of r x can be obtained from equation (1). specifcation of both v + and v - voltage threshold levels simul taneously can be obtained by the use of r x and r p as shown in figure 13 and determined by equations (2) and (3). r x can provide over-current transient protection by limiting input current during a transient condition. for monitoring con tacts of a relay or switch, the hcpl- 0370/3700/3760 in combina tion with r x and r p can be used to allow a specifc current to be conducted through the contacts for clean ing purposes (wetting current). the choice of which input voltage clamp level to choose depends upon the application of this device (see figure 1). it is recom mended that the low clamp condition be used when possible. the low clamp condition in conjunction with the low input current feature will ensure extremely low input power dissipation. in applications where dv cm /dt may be extremely large (such as static discharge), a series resis tor, r cc , should be con nected in series with v cc and pin 8 to pro tect the detector ic from destruc tively high surge currents. see note 13 for deter mination of r cc . in addi tion, it is recom - mended that a ceramic disc by pass capacitor of 0.01 f be placed between pins 8 and 5 to reduce the efect of power supply noise. v + - v th+ (-) (-) r x = (1) i th+ (-) for two specifcally selected external threshold voltage levels, v + and v - , the use of r x and r p will permit this selec - tion via equations (2), (3) provided the following condi - tions are met. if the denominator of equation (2) is posi - tive, then v + v th+ v + - v th+ i th+ and < v - v th- v - - v th- i th- conversely, if the denominator of equation (2) is negative, then v + v th+ v + - v th+ i th+ and > v - v th- v - - v th- i th- v th- (v + ) - v th+ (v - ) r x = (2) i th+ (v th- ) - i th- (v th+ ) v th- (v + ) - v th+ (v - ) r p = (3) i th+ (v - -v th- )+i th- (v th+ -v + ) figure 13. external threshold voltage level selection. for interfacing ac signals to ttl systems, output low pass fltering can be performed with a pullup resistor of 1.5 k w and 20 f capacitor. this application requires a schmitt trigger gate to avoid slow rise time chatter prob - lems. for ac input applica tions, a flter capacitor can be placed across the dc input terminals for either signal or transient fltering. either ac (pins 1, 4) or dc (pins 2, 3) input can be used to determine external threshold levels. for one specifcally selected external threshold voltage level v + or v - , r x can be determined without use of r p via

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