general description the max6461?ax6466 family of ultra-low-power voltage detectors and ? reset supervisory circuits monitors bat- tery, power-supply, and system voltages. each circuit includes a precision bandgap reference, a comparator, internally trimmed resistor networks that set specified trip thresholds, and an internal 5% threshold hysteresis circuit (see the functional diagram ). output is asserted when v cc falls below the internal v th- and remains asserted until v cc rises above v th + (v th + = v th - 1.05). these devices provide excellent circuit reliability and low costby eliminating external components and adjustments when monitoring nominal system voltages from +1.6v to +5.5v. the max6461/max6462/max6463 are voltage detectors with a propagation delay of 17?. the max6464/max6465/max6466 are ? supervisory circuits with a minimum reset timeout period of 150ms. all devices are available with thresholds from +1.6v to +5.5v in 100mv increments. the family is available with three output stage options: push-pull with active-low output, push-pull with active- high output, and open drain with active-low output. these devices are available in sc70 and sot23 packagesspecified over the -40? to +125? temperature range. applications precision battery monitoringload switching/power sequencing power-supply monitoring in digital/analog systems noise-immune ? reset circuits portable/battery-powered equipment cellular phones/cordless phones pdas portable medical devices features ? ultra-low 1.0? supply current ? preset thresholds from +1.6v to +5.5v in 100mvincrements ? internal 5% threshold hysteresis ? ?.5% threshold accuracy over temperature ? internal timeout period option (150ms min) ? immune to short voltage transients ? no external components ? available in three output options: push-pull(active low/active high) and open drain (active low) ? fully specified from -40? to +125? ? small sc70 and sot23 packages max6461?ax6466 ultra-low-power voltage detectors and ? supervisory circuits ________________________________________________________________ maxim integrated products 1 top view (out)/out 1 3v cc gnd max6461 max6466 sc70-3 2 gnd (out)/out gnd 15 v cc n.c. max6461 max6466 sot23-5 234 gnd 1 3v cc max6461 max6466 sot23-3 2 (out)/out ( ) are for the max6462/max6465 only pin configurations ordering information 19-2533; rev 2; 12/05 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. part temp range pin-package max6461 xr_ _-t -40? to +125? 3 sc70-3 max6461ur_ _-t -40? to +125? 3 sot23-3 max6461uk_ _-t -40? to +125? 5 sot23-5 max6462 xr_ _-t -40? to +125? 3 sc70-3 max6462ur_ _-t -40? to +125? 3 sot23-3 max6462uk_ _-t -40? to +125? 5 sot23-5 ordering information continued at end of data sheet.selector guide appears at end of data sheet. the max6461?ax6466 are available in factory-set thresholdsfrom 1.6v to 5.5v in approximately 100mv increments. choose the desired voltage threshold suffix from table 1 and insert it in the blank spaces in the part number. there are 30 standard ver- sions with a required order increment of 2500 pieces. sample stock generally is held on the standard versions only (table 2). nonstandard versions require a 10k-piece order increment. contact factory for availability. all devices available in tape-and- reel only. devices are available in both leaded and lead-free packaging. specify lead-free by replacing ?t?with ?t?when ordering. downloaded from: http:///
max6461?ax6466 ultra-low-power voltage detectors and ? supervisory circuits 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics(v cc = +1.2v to +6v, t a = -40? to +125?. typical values are at t a = +25?, unless otherwise noted.) (note1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. (all voltages referenced to gnd unless otherwise noted.)v cc , open-drain out..............................................-0.3v to +7v push-pull out/ out ....................................-0.3v to (v cc + 0.3v) input/output current (all pins) ............................................20ma output short circuit (v cc or gnd) continuous power dissipation (t a = +70?) 3-pin sc70 (derate 2.9mw/? above +70?) ...........228.6mw 3-pin sot23 (derate 4.0mw/? above +70?)............320mw 5-pin sot23 (derate 7.1mw/? above +70?)............571mw operating temperature range .........................-40? to +125? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? parameter symbol conditions min typ max units t a = 0? to +125? 1 6 operating voltage range v cc t a = -40? to 0? 1.2 6.0 v v cc = 3.6v, t a = -40? to +125?, no load, output not asserted 12 v cc = 5.0v, t a = -40? to +85?, no load, output not asserted 1.3 2.5 v cc supply current i cc v cc = 5.0v, t a = +85? to +125?, no load, output not asserted 3.5 ? v cc rising, t a = +25? (v th +) 0.985 v th + (v th +) 1.015 v th + v cc rising, t a = -40? to +125? (v th +) 0.975 (v th +) 1.025 v cc falling, t a = +25? (v th -) 0.985 v th - (v th -) 1.015 voltage threshold(note 2) v th - v cc falling, t a = -40? to +125? (v th -) 0.975 (v th -) 1.025 v voltage threshold hysteresis v hyst v hyst = [(v th +) - (v th -)] / (v th -)] 100% 3 4.5 6 % v cc falling at 10mv/? from (v th -) + 100mv to (v th -) - 100mv 17 propagation delay t p v cc rising at 10mv/? from (v th +) - 100mv to (v th +) + 100mv max6461/max6462/ max6463 only 100 ? startup time(max6461/max6462/max6463) 225 ? output timeout period(max6464/max6465/max6466) t rp 150 260 430 ms downloaded from: http:///
max6461?ax6466 ultra-low-power voltage detectors and ? supervisory circuits _______________________________________________________________________________________ 3 electrical characteristics (continued)(v cc = +1.2v to +6v, t a = -40? to +125?. typical values are at t a = +25?, unless otherwise noted.) (note1) parameter symbol conditions min typ max units v cc 1.2v, i sink = 1.0ma, out asserted 0.3 v cc 2.5v, i sink = 4.0ma, out asserted 0.3 out output low (open drain or push-pull) v ol v cc 4.5v, i sink = 9.0ma, out asserted 0.4 v v cc 1.8v, i source = 1.5ma, out not asserted 0.8 v cc v cc 2.5v, i source = 3.0ma, out not asserted 0.8 v cc out output high (push-pull) v oh v cc 4.5v, i source = 8.0ma, out not asserted 0.8 v cc v out output open-drain leakage current i lkg out not asserted, v out = +6v 100 na v cc 1.2v, i source = 200?, out asserted 0.8 v cc v cc 1.8v, i source = 1.5ma, out asserted 0.8 v cc v cc 2.5v, i source = 3.0ma, out asserted 0.8 v cc out output high (push-pull) v oh v cc 4.5v, i source = 8.0ma, out asserted 0.8 v cc v v cc 2.5v, i sink = 4.0ma, out not asserted 0.3 out output low (push-pull) v ol v cc 4.5v, i sink = 9.0ma, out not asserted 0.4 v note 1: 100% production testing done at +25?. limits over temperature are guaranteed by design. note 2: see table 1 for v th - and v th + values. t ypical operating characteristics (v cc = 5v, t a = +25?, unless otherwise noted.) supply current vs. temperature max6461 toc01 temperature ( c) supply current ( a) 110 95 80 65 50 35 20 5 -10 -25 1.20 1.25 1.30 1.35 1.40 1.451.15 -40 125 v cc = 5v, no load propagation delay (rising) vs. temperature max6461 toc02 temperature ( c) propagation delay ( s) 110 95 80 65 50 35 20 5 -10 -25 70 80 90 100 110 120 60 -40 125 v cc rising at 200mv/ s from ((v th +) - 100mv) to ((v th +) + 100mv) propagation delay (falling) vs. temperature max6461 toc03 temperature ( c) propagation delay ( s) 110 95 80 65 50 35 20 5 -10 -25 5 10 15 20 25 30 35 40 0 -40 125 v cc falling at 200mv/ s from ((v th -) + 100mv) to ((v th -) - 100mv) downloaded from: http:///
max6461?ax6466 ultra-low-power voltage detectors and ? supervisory circuits 4 _______________________________________________________________________________________ t ypical operating characteristics (continued) (v cc = 5v, t a = +25?, unless otherwise noted.) maximum v cc transient duration vs. v th- threshold overdrive max6461 toc04 v th- threshold overdrive ((v th- ) - v cc ) (v) transient duration ( s) 0.1 11 12 13 14 15 16 17 18 19 2010 0.01 1 output asserts above this line max6464_ _22 propagation delay v cc rising max6461 toc05a 20 s/div 100mv/div ac-coupled 1v/div v cc out active-highoutput max6462_ _16 propagation delay v cc falling max6461 toc05b 10 s/div 100mv/div ac-coupled 1v/div v cc out active-highoutput max6462_ _16 output voltage high vs. source current max6461 toc06a source current (ma) output voltage (v) 9 8 7 6 5 4 3 2 1 4.5 5.0 5.5 6.04.0 01 0 output voltage high vs. source current max6461 toc06b source current (ma) output voltage (v) 9 8 7 6 5 4 3 2 1 2.7 2.9 3.1 3.3 3.52.5 01 0 v cc = 3.3v v th = 2.9v output voltage low vs. sink current max6461 toc07 sink current (ma) output voltage (mv) 9 8 6 7 2 3 4 5 1 25 50 75 100 125 150 175 200 225 250 275 300 0 01 0 v cc = 2.7v v th = 2.9v normalized threshold vs. temperature max6461 toc08 temperature ( c) normalized threshold 110 95 80 65 50 35 20 5 -10 -25 0.99 1.00 1.01 1.020.98 -40 125 normalized output timeout period vs. temperature max6461 toc09 temperature ( c) normalized reset timeout period 110 95 80 65 50 35 20 5 -10 -25 0.99 1.00 1.01 1.020.98 -40 125 max6466 hysteresis vs. temperature max6461 toc10 temperature ( c) % of v th- 110 95 80 65 50 35 20 5 -10 -25 4.5 5.0 5.5 6.04.0 -40 125 max6461 downloaded from: http:///
detailed description the max6461/max6462/max6463 voltage detectors and the max6464/max6465/max6466 ? reset supervi- sory circuits monitor battery, power-supply, and system voltages from +1.6v to +5.5v. these devices consume only 1? of supply current with a 3.6v supply voltage. whenever v cc falls below the internal v th - threshold, the output is asserted and remains asserted until v cc rises above v th+ (v th+ = v th - 1.05). all devices have 2.5% threshold accuracy over temperature and offer protection to short voltage transients. these devices areideal for low-cost and space-critical applications because they do not require external components for proper operation. max6461?ax6466 ultra-low-power voltage detectors and ? supervisory circuits _______________________________________________________________________________________ 5 pin description pin max6461?ax6466 sot23-3 sc70-3 sot23-5 name function out detector output for the max6461/max6462/max6463: push-pull (active-low oractive-high) and open-drain (active-low) options. out is asserted low when the monitored input (v cc ) drops below the internal v th- threshold and remains low until the monitored input exceeds the internal v th+ threshold. out is asserted high when the monitored input (v cc ) drops below the internal v th- threshold and remains high until the monitored input exceeds the internal v th+ threshold. the open-drain output out requires an external pullup resistor. output for the max6464/max6465/max6466: push-pull (active-low or active-high) and open-drain (active-low) options. 124 out out is asserted low when the monitored input (v cc ) drops below the internal v th- threshold and remains low for at least 150ms after the monitored input exceeds the internal v th+ threshold. out is asserted high when the monitored input (v cc ) drops below the internal v th- threshold and remains high for at least 150ms after the monitored input exceeds the internal v th+ threshold. the open- drain output out requires an external pullup resistor. 21 2, 3 gnd ground. in the sot23-5 package, both pins must be grounded. 335v cc supply voltage and monitored voltage input 1n .c. no connection reset timeout output stage 1.23v v cc out r1r2 r3 max6461 max6466 functional diagram downloaded from: http:///
max6461?ax6466 applications information interfacing to different logic voltage components the max6463 and max6466? active-low, open-drain out- put versions can be used to interface with a different logic voltage than v cc , as shown in figure 1. this output struc- ture sinks current when out is asserted. connect a pullup resistor from out to any supply from 0 to 6v. select a resistor value large enough to allow a valid logiclow (see the electrical characteristics ) and small enough to register a logic high while supplying all input currentand leakage paths connected to the out pin. hysteresis the max6461?ax6466 feature internal hysteresis thatcreates two trip points: one for rising supply voltage and one for falling supply voltage. the hysteresis pre- vents the output from oscillating (chattering) when v cc is near the voltage threshold. transients immunity these devices are relatively immune to short-durationand falling v cc transients (glitches). the typical operating characteristics show the maximum transient duration vs. threshold overdrive graph, for which out is not asserted. the graph shows the maximum pulsewidth that a falling v cc transient typically might have before the devices are asserted. as the amplitude ofthe transient increases, the maximum allowable pulse width decreases. ensuring valid output down to 0v when v cc falls below 1v, the max6461/max6464 out- put sinking capability is reduced. therefore, high-impedance cmos logic inputs connected to out can drift to undetermined voltages. this presents no prob-lem in most applications, because most circuitry is inoperative when v cc is below 1v. in applications where out must be valid down to ground, add a pull- down resistor to ground so any stray leakage currentsflow to ground, holding out low. select a resistor large enough not to load out and small enough to pull out to ground. for most applications, 100k ? does not load out and pulls out to ground. ultra-low-power voltage detectors and ? supervisory circuits 6 _______________________________________________________________________________________ dc/dc converter out max6463max6466 p suspend v cc out in v cc 3.6v li+ figure 1. interfacing to different logic voltage components downloaded from: http:///
max6461?ax6466 ultra-low-power voltage detectors and ? supervisory circuits _______________________________________________________________________________________ 7 table 1a. max6461?ax6466 lower trip threshold (v th -) voltage options voltage threshold, v th- t a = +25? t a = -40? to +125? suffix v th- (min) v th- (typ) v th- (max) v th- (min) v th- (max) 16 1.576 1.600 1.624 1.560 1.640 17 1.675 1.700 1.726 1.658 1.743 18 1.773 1.800 1.827 1.755 1.845 19 1.872 1.900 1.929 1.853 1.948 20 1.970 2.000 2.030 1.950 2.050 21 2.069 2.100 2.132 2.048 2.153 22 2.167 2.200 2.233 2.145 2.255 23 2.266 2.300 2.335 2.243 2.358 24 2.364 2.400 2.436 2.340 2.460 25 2.463 2.500 2.538 2.438 2.563 26 2.561 2.600 2.639 2.535 2.665 27 2.660 2.700 2.741 2.633 2.768 28 2.758 2.800 2.842 2.730 2.870 29 2.857 2.900 2.944 2.828 2.973 30 2.955 3.000 3.045 2.925 3.075 31 3.054 3.100 3.147 3.023 3.178 32 3.152 3.200 3.248 3.120 3.280 33 3.251 3.300 3.350 3.218 3.383 34 3.349 3.400 3.451 3.315 3.485 35 3.448 3.500 3.553 3.413 3.588 36 3.546 3.600 3.654 3.510 3.690 37 3.645 3.700 3.756 3.608 3.793 38 3.743 3.800 3.857 3.705 3.895 39 3.842 3.900 3.959 3.803 3.998 40 3.940 4.000 4.060 3.900 4.100 41 4.039 4.100 4.162 3.998 4.203 42 4.137 4.200 4.263 4.095 4.305 43 4.236 4.300 4.365 4.193 4.408 44 4.334 4.400 4.466 4.290 4.510 45 4.433 4.500 4.568 4.388 4.613 46 4.531 4.600 4.669 4.485 4.715 47 4.630 4.700 4.771 4.583 4.818 48 4.728 4.800 4.872 4.680 4.920 49 4.827 4.900 4.974 4.778 5.023 50 4.925 5.000 5.075 4.875 5.125 51 5.024 5.100 5.177 4.973 5.228 52 5.122 5.200 5.278 5.070 5.330 53 5.221 5.300 5.380 5.168 5.433 54 5.319 5.400 5.481 5.265 5.535 55 5.418 5.500 5.583 5.363 5.638 downloaded from: http:///
max6461?ax6466 ultra-low-power voltage detectors and ? supervisory circuits 8 _______________________________________________________________________________________ table 1b. max6461?ax6466 upper trip threshold (v th +) voltage options voltage threshold, v th+ t a = +25? t a = -40? to +125? suffix v th+ (min) v th+ (typ) v th+ (max) v th+ (min) v th+ (max) 16 1.647 1.672 1.697 1.630 1.714 17 1.750 1.777 1.803 1.732 1.821 18 1.853 1.881 1.909 1.834 1.928 19 1.956 1.986 2.015 1.936 2.035 20 2.059 2.090 2.121 2.038 2.142 21 2.162 2.195 2.227 2.140 2.249 22 2.265 2.299 2.333 2.242 2.356 23 2.367 2.404 2.440 2.343 2.464 24 2.470 2.508 2.546 2.445 2.571 25 2.573 2.613 2.652 2.547 2.678 26 2.676 2.717 2.758 2.649 2.785 27 2.779 2.822 2.864 2.751 2.892 28 2.882 2.926 2.970 2.853 2.999 29 2.985 3.031 3.076 2.955 3.106 30 3.088 3.135 3.182 3.057 3.213 31 3.191 3.240 3.288 3.159 3.320 32 3.294 3.344 3.394 3.260 3.428 33 3.397 3.449 3.500 3.362 3.535 34 3.500 3.553 3.606 3.464 3.642 35 3.603 3.658 3.712 3.566 3.749 36 3.706 3.762 3.818 3.668 3.856 37 3.809 3.867 3.924 3.770 3.963 38 3.911 3.971 4.031 3.872 4.070 39 4.014 4.076 4.137 3.974 4.177 40 4.117 4.180 4.243 4.076 4.285 41 4.220 4.285 4.349 4.177 4.392 42 4.323 4.389 4.455 4.279 4.499 43 4.426 4.494 4.561 4.381 4.606 44 4.529 4.598 4.667 4.483 4.713 45 4.632 4.703 4.773 4.585 4.820 46 4.735 4.807 4.879 4.687 4.927 47 4.838 4.912 4.985 4.789 5.034 48 4.941 5.016 5.091 4.891 5.141 49 5.044 5.121 5.197 4.992 5.249 50 5.147 5.225 5.303 5.094 5.356 51 5.250 5.330 5.409 5.196 5.463 52 5.352 5.434 5.516 5.298 5.570 53 5.455 5.539 5.622 5.400 5.677 54 5.558 5.643 5.728 5.502 5.784 55 5.661 5.748 5.834 5.604 5.891 downloaded from: http:///
max6461?ax6466 ultra-low-power voltage detectors and ? supervisory circuits _______________________________________________________________________________________ 9 table 2. standard versions table part top mark (sc70) max6461 xr16-t amb max6461xr22-t amc max6461xr26-t amd max6461xr29-t akv max6461xr46-t ame max6462 xr16-t akw max6462xr22-t amf max6462xr26-t amg max6462xr29-t amh max6462xr46-t ami max6463 xr16-t amj max6463xr22-t amk max6463xr26-t aml max6463xr29-t amm max6463xr46-t amn part top mark (sc70) max6464 xr16-t amo max6464xr22-t amp max6464xr26-t amq max6464xr29-t amr max6464xr46-t ams max6465 xr16-t amt max6465xr22-t amu max6465xr26-t amv max6465xr29-t amw max6465xr46-t akz max6466 xr16-t amx max6466xr22-t amy max6466xr26-t amz max6466xr29-t ala max6466xr46-t alb selector guide part push-pull out push-pull out open-drain out typical propagation delay ( s) minimum timeout period (ms) max6461 ? 1 4 max6462 ? ? 4 max6463 ? 14 max6464 ? 150 max6465 ? 150 max6466 ? 150 downloaded from: http:///
max6461?ax6466 ultra-low-power voltage detectors and ? supervisory circuits maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2005 maxim integrated products printed usa is a registered trademark of maxim integrated products, inc. chip information transistor count: 581process: bicmos package information for the latest package outline information, go to www.maxim-ic.com/packages .) ordering information (continued) part temp range pin-package max6463 xr_ _-t -40? to +125? 3 sc70-3 max6463ur_ _-t -40? to +125? 3 sot23-3 max6463uk_ _-t -40? to +125? 5 sot23-5 max6464 xr_ _-t -40? to +125? 3 sc70-3 max6464ur_ _-t -40? to +125? 3 sot23-3 max6464uk_ _-t -40? to +125? 5 sot23-5 max6465 xr_ _-t -40? to +125? 3 sc70-3 max6465ur_ _-t -40? to +125? 3 sot23-3 max6465uk_ _-t -40? to +125? 5 sot23-5 max6466 xr_ _-t -40? to +125? 3 sc70-3 max6466ur_ _-t -40? to +125? 3 sot23-3 max6466uk_ _-t -40? to +125? 5 sot23-5 the max6461?ax6466 are available in factory-set thresholdsfrom 1.6v to 5.5v in approximately 100mv increments. choose the desired voltage threshold suffix from table 1 and insert it in the blank spaces in the part number. there are 30 standard ver- sions with a required order increment of 2500 pieces. sample stock generally is held on the standard versions only (table 2). nonstandard versions require a 10k-piece order increment. contact factory for availability. all devices available in tape-and- reel only. devices are available in both leaded and lead-free packaging. specify lead-free by replacing ?t?with ?t?when ordering. downloaded from: http:///
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