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general description the max6754?ax6764 low-power window detectors monitor undervoltage/overvoltage conditions on system power supplies. these devices assert when the moni- tored voltage is under the undervoltage and/or over the overvoltage thresholds. the max6754?ax6759/max6763/max6764 monitor a single voltage. the max6760/max6761/max6762 monitor dual-voltage systems. the max6754/max6755/ max6756 provide a single undervoltage/overvoltage output and the max6757?ax6764 provide indepen- dent undervoltage and overvoltage outputs. the out- puts are available in push-pull or open-drain configurations. the max6754?ax6762 offer factory-fixed voltage thresholds for monitoring system voltages from 0.9v to 5v with a selectable ?%, ?0%, or ?5% window volt- age. the max6763/max6764 allow for externally adjustable thresholds. the max6754?ax6762 are available in two delay timing options (20?, typ or 100ms, min). the max6760/max6761/max6762 also include a latched overvoltage output function and the max6754?ax6762 include a manual reset input. the family of products is available in small sot23 and tdfn packages and is specified over the extended temperature range of -40? to +125?. applications features ? single- or dual-supply voltage monitors ? factory-trimmed window threshold options for 5v, 3.3v, 3v, 2.5v, 1.8v, 1.5v, 1.2v, and 0.9v supplies ? externally adjustable window monitoring options for supplies down to 0.5v ? selectable window threshold options (?%, ?0%, ?5%) ? single (combined uv/ov) or dual (separate uv and ov) outputs ? 20? (typ) or 100ms (min) timeout period options (max6754?ax6762) ? manual reset input (max6754?ax6762) ? latched overvoltage output function (max6760/max6761/max6762) ? immune to short voltage transients ? low 10? supply current ? low-voltage operation (outputs valid for v cc down to 1v) ? -40? to +125? operating temperature range ? small sot23 and tdfn packages max6754?ax6764 low-power, single/dual-voltage window detectors ________________________________________________________________ maxim integrated products 1 ordering information max6757 nmi reset mr gnd v cc uv ov set v cc p t ypical application circuit 19-3075; rev 3; 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 max6754 uk_d_-t -40? to +125? 5 sot23-5 max6755 uk_d_-t -40? to +125? 5 sot23-5 max6756 uk_d_-t -40? to +125? 5 sot23-5 max6757 ut_d_-t -40? to +125? 6 sot23-6 max6758 ut_d_-t -40? to +125? 6 sot23-6 ordering information continued at end of data sheet. pin configurations appear at end of data sheet. telecommunications networking computers/servers data storage power metering dc-dc converter modules automotive * insert the threshold level suffixes for v cc and v cc2 (tables 1 and 2) after uk, ut, or ta. for the max6754?ax6759, insert only the v cc threshold suffix after the uk or ut. insert the reset timeout delay (table 3) after d to complete the part number. for example, the max6760taltd3-t provides a v cc threshold of 5v, a v cc2 threshold of 3.3v, and a 100ms minimum reset time- out period. sample stock is generally held on standard versions only (see the standard versions table). standard versions have an order increment requirement of 2500 pieces. nonstandard versions have an order increment requirement of 10,000 pieces. contact factory for availability. devices are available in both leaded and lead-free packaging. specify lead-free by replacing ?t?with ?t?when ordering.
max6754?ax6764 low-power, single/dual-voltage window detectors 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = 1.0v to 6.0v, v cc2 = 0 to 6.0v (max6760?ax6762), t a = -40? to +125?, unless otherwise noted. typical values are at t a = +25 c.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. (voltages with respect to gnd.) v cc , v cc2 , ............................................................-0.3v to +6.5v set, ovlatch, mr , uvin, ovin ..............-0.3v to (v cc + 0.3v) uv , reset , ov ( open drain) .................................-0.3v to +6.5v reset, ov , uv, uv , reset (push-pull).....-0.3v to (v cc + 0.3v) input/output current (all pins) ............................................20ma continuous power dissipation (t a = +70?) 5-pin sot23-5 (derate 7.1mw/c above t a = +70?)....571mw 6-pin sot23-6 (derate 8.7mw/c above t a = +70?)....696mw 8-pin tdfn (derate 24.4mw/? above t a = +70?).....1951mw 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 power requirements (note 2) 1.0 6.0 operating voltage range v cc max6760taaa/max6761taaa/ max6762taaa/max6763/max6764ut-t 1.4 6.0 v v cc = 3.6v, max6754?ax6759, no load 13 30 v cc = 3.6v, max6763/max6764, no load 10 23 v cc supply current i cc v cc = 3.6v, v cc v cc2 , max6760/max6761/max6762, no load 13 30 ? v cc2 supply current v cc2 = 1.8v, v cc v cc2 , max6760/max6761/max6762 1 1.5 ? adjustable bias current i cc2 v cc2 (max6760?ax6762ta_ad_) (note 3) -20 +20 na v cc threshold v set = v sb 5.750 5.875 6.000 set = v cc 5.500 5.625 5.750 l, 5v set = gnd 5.250 5.375 5.500 v set = v sb 3.795 3.878 3.960 set = v cc 3.630 3.713 3.795 t, 3.3v set = gnd 3.465 3.548 3.630 v set = v sb 3.450 3.525 3.600 set = v cc 3.300 3.375 3.450 r, 3.0v set = gnd 3.150 3.225 3.300 v set = v sb 2.875 2.938 3.000 set = v cc 2.750 2.813 2.875 z, 2.5v set = gnd 2.625 2.688 2.750 v set = v sb 2.070 2.115 2.160 set = v cc 1.980 2.025 2.070 v cc overvoltage threshold ov th t a = -40? to +125?, rising v cc w, 1.8v set = gnd 1.890 1.935 1.980 v
max6754?ax6764 low-power, single/dual-voltage window detectors _______________________________________________________________________________________ 3 electrical characteristics (continued) (v cc = 1.0v to 6.0v, v cc2 = 0 to 6.0v (max6760?ax6762), t a = -40? to +125?, unless otherwise noted. typical values are at t a = +25 c.) (note 1) parameter symbol conditions min typ max units v set = v sb 4.000 4.125 4.250 set = v cc 4.250 4.375 4.500 l, 5v set = gnd 4.500 4.625 4.750 v set = v sb 2.640 2.723 2.805 set = v cc 2.805 2.888 2.970 t, 3.3v set = gnd 2.970 3.053 3.135 v set = v sb 2.400 2.475 2.550 set = v cc 2.550 2.625 2.700 r, 3.0v set = gnd 2.700 2.775 2.850 v set = v sb 2.000 2.063 2.125 set = v cc 2.125 2.188 2.250 z, 2.5v set = gnd 2.250 2.313 2.375 v set = v sb 1.440 1.485 1.530 set = v cc 1.530 1.575 1.620 v cc undervoltage threshold uv th t a = -40? to +125?, falling v cc w, 1.8v set = gnd 1.620 1.665 1.710 v v set = v sb 3.795 3.878 3.960 set = v cc 3.630 3.713 3.795 t, 3.3v set = gnd 3.465 3.548 3.630 v set = v sb 3.450 3.525 3.600 set = v cc 3.300 3.375 3.450 r, 3.0v set = gnd 3.150 3.225 3.300 v set = v sb 2.875 2.938 3.000 set = v cc 2.750 2.813 2.875 z, 2.5v set = gnd 2.625 2.688 2.750 v set = v sb 2.070 2.115 2.160 set = v cc 1.980 2.025 2.070 w, 1.8v set = gnd 1.890 1.935 1.980 v set = v sb (note 2) 1.725 1.763 1.800 set = v cc (note 2) 1.650 1.688 1.725 i, 1.5v set = gnd (note 2) 1.575 1.613 1.650 v set = v sb (note 2) 1.380 1.410 1.440 set = v cc (note 2) 1.320 1.350 1.380 g, 1.2v set = gnd (note 2) 1.260 1.290 1.320 v set = v sb (note 2) 1.035 1.058 1.080 set = v cc (note 2) 0.990 1.013 1.035 e, 0.9v set = gnd (note 2) 0.945 0.968 0.990 v set = v sb 0.489 0.500 0.511 set = v cc 0.468 0.479 0.489 v cc2 overvoltage threshold ov th2 t a = -40? to +125?, rising v cc2 adj set = gnd 0.447 0.457 0.468 v
max6754?ax6764 low-power, single/dual-voltage window detectors 4 _______________________________________________________________________________________ electrical characteristics (continued) (v cc = 1.0v to 6.0v, v cc2 = 0 to 6.0v (max6760?ax6762), t a = -40? to +125?, unless otherwise noted. typical values are at t a = +25 c.) (note 1) parameter symbol conditions min typ max units v set = v sb 2.640 2.723 2.805 set = v cc 2.805 2.888 2.970 t, 3.3v set = gnd 2.970 3.053 3.135 v set = v sb 2.400 2.475 2.550 set = v cc 2.550 2.625 2.700 r, 3.0v set = gnd 2.700 2.775 2.850 v set = v sb 2.000 2.063 2.125 set = v cc 2.125 2.188 2.250 z, 2.5v set = gnd 2.250 2.313 2.375 v set = v sb 1.440 1.485 1.530 set = v cc 1.530 1.575 1.620 w, 1.8v set = gnd 1.620 1.665 1.710 v set = v sb (note 2) 1.200 1.238 1.275 set = v cc (note 2) 1.275 1.313 1.350 i, 1.5v set = gnd (note 2) 1.350 1.388 1.425 v set = v sb (note 2) 0.960 0.990 1.020 set = v cc (note 2) 1.020 1.050 1.080 g, 1.2v set = gnd (note 2) 1.080 1.110 1.140 v set = v sb (note 2) 0.720 0.743 0.765 set = v cc (note 2) 0.765 0.788 0.810 e, 0.9v set = gnd (note 2) 0.810 0.833 0.855 v set = v sb 0.340 0.351 0.362 set = v cc 0.362 0.372 0.383 v cc2 undervoltage threshold uv th2 t a = -40? to +125?, falling v cc2 adj set = gnd 0.383 0.394 0.404 v threshold hysteresis v hyst v cc , v cc2 0.7 % undervoltage/overvoltage inputs (uvin, ovin) (max6763/max6764) uvin, ovin threshold voltage v th-in 0.485 0.5 0.515 v uvin, ovin input bias current i in (note 3) -20 +20 na uvin, ovin threshold hysteresis v hyst 0.7 %
max6754?ax6764 low-power, single/dual-voltage window detectors _______________________________________________________________________________________ 5 electrical characteristics (continued) (v cc = 1.0v to 6.0v, v cc2 = 0 to 6.0v (max6760?ax6762), t a = -40? to +125?, unless otherwise noted. typical values are at t a = +25 c.) (note 1) parameter symbol conditions min typ max units timing characteristics d0 20 ? reset and uv timeout period t rp figure 7 d3 100 185 320 ms v cc to reset delay t d-reset v cc /v cc2 falling at 10mv/? from uv th + 100mv to uv th - 100mv 20 ? v cc to uv delay t d-uv v cc /v cc2 rising at 10mv/? from ov th - 100mv to ov th + 100mv 20 ? v cc to ov delay t d-ov v cc /v cc2 rising at 10mv/? from ov th - 100mv to ov th + 100mv (max6757?ax6762 only) 20 ? uvin to uv delay (max6763/max6764) 20 ? ovin to ov delay (max6763/max6764) 20 ? startup delay time t start d0 options only, ov output (note 4) 2 ms threshold window select input (set) input-voltage low 0 0.1 v v cc = 1.4v 0.65 0.75 v cc = 3.0v 0.81 2.19 input bias voltage (note 5) v sb v cc = 6.0v 1.10 4.90 v input-voltage high v cc - 0.1 v cc v input current i set -1 +1 ? manual reset ( mr ) input-voltage low 0.23 x v cc v input-voltage high 0.6 x v cc v pullup resistance to v cc 26 k ? minimum pulse width 4s transient immunity 300 ns t d-mr mr falling, figure 7 300 d0 40 ns propagation delay t mr_p mr rising, figure 7 d3 100 185 320 ms overvoltage output latch control input (ovlatch) input-voltage low 0.3 x v cc v input-voltage high 0.7 x v cc v
max6754?ax6764 low-power, single/dual-voltage window detectors 6 _______________________________________________________________________________________ electrical characteristics (continued) (v cc = 1.0v to 6.0v, v cc2 = 0 to 6.0v (max6760?ax6762), t a = -40? to +125?, unless otherwise noted. typical values are at t a = +25 c.) (note 1) parameter symbol conditions min typ max units input bias current i ovlatch -1 +1 ? reset, reset , uv , uv, ov any v cc 1.0v, i sink = 100?, output asserted 0.3 any v cc 1.2v, i sink = 200?, output asserted 0.3 any v cc 1.71v, i sink = 1.0ma, output asserted 0.3 any v cc 2.85v, i sink = 2.0ma, output asserted 0.3 reset , uv output low (open drain or push-pull) v ol any v cc 4.75v, i sink = 4.0ma, output asserted 0.3 v any v cc 1.71v, i source = 0.8ma, output deasserted 0.8 x v cc any v cc 2.85v, i source = 2.0ma, output deasserted 0.8 x v cc reset , uv output high (push-pull) v oh any v cc 4.75v, i source = 4.0ma, output deasserted 0.8 x v cc v any v cc 1.71v, i sink = 1.0ma, output deasserted 0.3 any v cc 2.85v, i sink = 2.0ma, output deasserted 0.3 reset, uv output low (push-pull) v ol any v cc 4.75v, i sink = 4.0ma, output deasserted 0.3 v any v cc 1.0v, i source = 50?, output asserted 0.8 x v cc any v cc 1.2v, i source = 100?, output asserted 0.8 x v cc any v cc 1.71v, i source = 0.8ma, output asserted 0.8 x v cc any v cc 2.85v, i source = 2.0ma, output asserted 0.8 x v cc reset, uv output high (push-pull) v oh any v cc 4.75v, i source = 4.0ma, output asserted 0.8 x v cc v
max6754?ax6764 low-power, single/dual-voltage window detectors _______________________________________________________________________________________ 7 electrical characteristics (continued) (v cc = 1.0v to 6.0v, v cc2 = 0 to 6.0v (max6760?ax6762), t a = -40? to +125?, unless otherwise noted. typical values are at t a = +25 c.) (note 1) parameter symbol conditions min typ max units any v cc 1.98v, i sink = 1.4ma, output asserted 0.3 any v cc 2.75v, i sink = 2.0ma, output asserted 0.3 any v cc 3.63v, i sink = 3.0ma, output asserted 0.3 ov output low (open-drain or push-pull) v ol any v cc 5.5v, i sink = 4.0ma, output asserted 0.3 v any v cc 1.0v, i source = 50?, output deasserted 0.8 x v cc any v cc 1.2v, i source = 100?, output deasserted 0.8 x v cc any v cc 1.98v, i source = 1.4ma, output deasserted 0.8 x v cc any v cc 2.75v, i source = 2.0ma, output deasserted 0.8 x v cc any v cc 3.63v, i source = 3.0ma, output deasserted 0.8 x v cc ov output high (push-pull) v oh any v cc 5.5v, i source = 4.5ma, output deasserted 0.8 x v cc v reset , uv , ov output open- drain leakage current i lkg output not asserted 1 a note 1: devices are production tested at +25?. overtemperature limits are guaranteed by design. note 2: voltage monitoring requires that v cc must be greater than or equal to 1.4v, but outputs remain asserted in the correct state for v cc down to 1.0v. note 3: guaranteed by design. note 4: for d0 window detector options and ov outputs, startup delay time is the time required for the internal reference/circuitry to reach specified accuracy after the monitor is powered up from gnd. note 5: the input bias voltage is based off of v cc . the minimum value is given by the equation (0.1 x v cc + 0.51)v and the maxi- mum value is given by (0.9 x v cc - 0.51)v.
max6754?ax6764 low-power, single/dual-voltage window detectors 8 _______________________________________________________________________________________ t ypical operating characteristics (v cc = 5v, v cc2 = 3.3v, t a = +25?, unless otherwise noted.) overvoltage threshold vs. temperature max6754 toc01 temperature ( c) normalized overvoltage threshold (v) 110 95 80 65 50 35 20 5 -10 -25 0.98 0.99 1.00 1.01 1.02 1.03 0.97 -40 125 overvoltage threshold rising overvoltage threshold falling normalized to rising threshold at t a = +25 c undervoltage threshold vs. temperature max6754 toc02 temperature ( c) normalized undervoltage threshold (v) 110 95 80 65 50 35 20 5 -10 -25 0.98 0.99 1.00 1.01 1.02 1.03 0.97 -40 125 undervoltage threshold rising undervoltage threshold falling normalized to falling threshold at t a = +25 c transient immunity vs. threshold overdrive max6754 toc03 overdrive (mv) transient immunity ( s) 100 10 100 1000 1 1000 10 output asserts above this line d3 timeout period vs. temperature max6754 toc04 timeout period (ms) 182 184 186 188 190 192 194 180 temperature ( c) 110 95 80 65 50 35 20 5 -10 -25 -40 125 supply current vs. supply voltage max6754 toc05 v cc (v) i cc ( a) 5 4 3 2 8 10 12 14 16 18 20 6 16 t a = +125 c t a = +85 c t a = +25 c t a = -40 c output-voltage low vs. sink current max6754 toc06 i sink (ma) v ol (v) 15 10 5 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0 020 v cc = 5.0v v cc = 3.3v v cc = 2.5v v cc = 1.8v output-voltage high vs. source current max6754 toc07 i source (ma) v oh - v cc (v) 15 10 5 -1.6 -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 -1.8 020 v cc = 5.0v v cc = 3.3v v cc = 2.5v v cc = 1.8v
max6754?ax6764 low-power, single/dual-voltage window detectors _______________________________________________________________________________________ 9 pin description pin max6754/ max6755/ max6756 max6757/ max6758/ max6759 max6760/ max6761/ max6762 max6763/ max6764 name function 111 power voltage input. v cc powers the device. v cc is the monitored voltage. 1 v cc power input. v cc powers the device. 2 222 gnd ground 338 mr active-low manual reset input. drive mr low to assert undervoltage and reset outputs. the asserted output remains asserted for the specified propagation delay period after mr goes high. mr is internally pulled up to v cc through a 26k ? resistor. 4 reset/ reset reset output. the reset output asserts when v cc is below the selected uv th threshold or above the selected ov th threshold. reset output deasserts after the specified timeout period after v cc rises above the uv th threshold or drops below the ov th threshold. max6754: active-low push-pull output ( reset ). max6755: active-high push-pull output (reset). max6756: active-low open-drain output ( reset ). 564 set threshold window select input. set configures the undervoltage and overvoltage window range for the internal detectors. connect set to gnd for ?% window, or to v cc for ?0% window. bias set to v cc /2 for a ?5% window. ? 6 uv/ uv undervoltage output. uv/ uv asserts when the monitored supply/supplies are below the uv th thresholds or mr is low. uv/ uv deasserts after the specified timeout period when the monitored supply/supplies rise above the uv th thresholds or for the specified propagation delay after mr goes high. max6757/max6760: active-low push-pull output ( uv ). max6758/max6761: active-high push-pull output (uv). max6759/max6762: active-low open-drain output ( uv ). 3 v cc2 v cc2 voltage input. input for the second window voltage monitor, and device output power supply when v cc2 > v cc . 555 ov active-low overvoltage output. ov asserts low when the monitored supply/supplies are above their overvoltage threshold (ov th ). ov goes high impedance immediately when the monitored supply/supplies drop below ov th . there is no timeout delay period for the ov output. for max6763/max6764, ov is low when ovin is above the internal 0.5v threshold. ov is high when ovin is below the internal 0.5v threshold. max6757?ax6762: active-low open-drain output. max6763: active-low push-pull output. max6764: active-low open-drain output.
max6754?ax6764 low-power, single/dual-voltage window detectors 10 ______________________________________________________________________________________ pin description (continued) pin max6754/ max6755/ max6756 max6757/ max6758/ max6759 max6760/ max6761/ max6762 max6763/ max6764 name function 7 ovlatch overvoltage output latch control input. drive ovlatch high to latch the overvoltage output for any v cc or v cc2 overvoltage condition. drive ovlatch low to clear the latch after overvoltage conditions have been removed. the latch is transparent when ovlatch is connected to gnd. ovlatch is a high-impedance input. use external pullup or pulldown. 3 uvin undervoltage input. uv is low when uvin is below the internal 0.5v threshold. uv is high when uvin is above the internal 0.5v threshold. 4 uv undervoltage output. uv is low when uvin is below the internal 0.5v threshold. uv is high when uvin is above the internal 0.5v threshold. there is no timeout delay period for the uv output. ? ovin overvoltage input. ov is low when ovin is above the internal 0.5v threshold. ov is high when ovin is below the internal 0.5v threshold. ep ?p exposed pad. ep is internally connected to gnd. leave ep unconnected or connect to gnd. functional diagrams timeout period option adjust monitor voltage uv threshold -5%, -10%, -15% ov threshold +5%, +10%, +15% internal reference gnd (reset)/ reset mr v cc ov monitor uv monitor max6754/max6755/max6756 ov th uv th set ( ) max6755 only. figure 1. max6754/max6755/max6756 functional diagram
max6754?ax6764 low-power, single/dual-voltage window detectors ______________________________________________________________________________________ 11 timeout period option adjust monitor voltage uv threshold -5%, -10%, -15% ov threshold +5%, +10%, +15% internal reference gnd (uv)/ uv mr v cc ov monitor uv monitor max6757/max6758/max6759 ov th uv th set ( ) max6758 only. ov v cc figure 2. max6757/max6758/max6759 functional diagram functional diagrams (continued)
max6754?ax6764 low-power, single/dual-voltage window detectors 12 ______________________________________________________________________________________ ov monitor uv monitor ov th uv th ov monitor uv monitor ov th uv th uv threshold -5%, -10%, -15% ov threshold +5%, +10%, +15% internal reference adjust monitor voltage adjust monitor voltage timeout period option ov circuit mr v cc v cc2 set gnd (uv)/ uv ov ovlatch max6760/max6761/max6762 ( ) max6761 only. figure 3. max6760/max6761/max6762 functional diagram functional diagrams (continued)
max6754?ax6764 low-power, single/dual-voltage window detectors ______________________________________________________________________________________ 13 detailed description the max6754?ax6764 are low-power window volt- age detectors capable of monitoring undervoltage and overvoltage conditions on system power supplies. whenever a monitored voltage falls below its undervolt- age threshold or exceeds its overvoltage threshold, these devices assert their outputs to notify the system (see the functional diagrams ). the max6754/max6755/max6756 are single-voltage window detectors with internally fixed nominal voltage, externally adjustable set window, single reset under/overvoltage output, and a manual reset input. the max6757/max6758/max6759 are single-voltage window detectors with internally set nominal voltage, externally adjustable set window, separate under/over- voltage outputs, and manual reset input. the max6760/max6761/max6762 are dual-voltage window detectors with internally/externally set nominal voltages, externally adjustable set window, separate under/overvoltage outputs, manual reset input, and overvoltage latch functions. the max6763/max6764 are single adjustable window detectors with separate under/overvoltage outputs. the max6754?ax6762 offer factory-fixed voltage thresholds for monitoring system voltages from 0.9v to 5v. the max6754?ax6762 include a set function to select the window voltage to ?%, ?0%, or ?5%. the max6763/max6764 allow for externally adjustable upper and lower voltage thresholds to be set externally (down to 0.5v). the max6754?ax6762 are available with two timing options (20? propagation delay or 100ms minimum reset timeout). supply voltages v cc is the power-supply input and the monitored voltage of the max6754?ax6762. these devices feature a fac- tory-trimmed v cc and v cc2 divider that sets the nominal input range (see tables 1 and 2). v cc for the max6763/ max6764 is the power supply of the device and not the monitored voltage. for noisy systems, bypass v cc and v cc2 each with a 0.1? capacitor to gnd. setting the adjustable nominal voltage threshold the max6760/max6761/max6762 (versions with suffix- es la, ta, ra, za, wa, and aa) offer adjustable nominal voltage threshold to monitor v cc2 . use an external volt- age-divider to set the voltage at v cc2 to 0.4255v. configure set to select a monitor window of ?%, ?0%, or ?5% (see figure 5). the max6760/max6761/ max6762 suffix aa monitor only v cc2 and do not moni- tor v cc . internal reference 0.5v gnd ov monitor uv monitor ov th uv th uv ov uvin v cc ovin max6763/max6764 figure 4. max6763/max6764 functional diagram functional diagrams (continued) ov (uv) uv 0.4255v +5% +10% +15% v cc2 0.4255v -5% -10% -15% max6760/max6761/max6762 (suffixes la, ta, ra, za, wa, aa) v+ r1 r2 ( ) max6761 only. figure 5. setting the threshold voltage of v cc2
max6754?ax6764 low-power, single/dual-voltage window detectors 14 ______________________________________________________________________________________ choose r2 to have a resistance of up to 500k ? . calculate r1 by: r1 = ((v + - 0.4255v) x r2) / 0.4255v the max6763/max6764 provide inputs to a window detector allowing the programming of the threshold voltage to within v cc (see figure 6). choose r1, r2, and r3 such that: (v+ / (r1 + r2 + r3)) 1? set the max6754?ax6762 allow the setting of the window voltage range of the voltage detector. connect set to gnd to set a 5% window. connect set to v cc for a ?0% window. bias set to v cc / 2 for a ?5% window. manual reset ( mr ) the max6754?ax6762 include an active-low manual reset input. drive mr low to assert a reset output (max6754/max6755/max6756) or an undervoltage output (max6757/max6758/max6759). the output remains asserted for the specified propagation delay time (see figure 7) after mr goes high. mr is internally pulled to v cc with a 26k ? resistor. overvoltage latch control input (ovlatch) the max6760/max6761/max6762 provide an overvolt- age latch control input (ovlatch). drive ovlatch high to latch the overvoltage output for any v cc or v cc2 overvoltage condition. drive ovlatch low to clear the latch after overvoltage conditions have been removed. the latch is transparent when ovlatch is connected to gnd. ovlatch is a high impedance input. use external pullup or pulldown. reset, undervoltage, and overvoltage outputs (reset, reset , uv , uv, ov) reset, reset , uv , uv, and ov outputs assert when the monitored supply is below the selected uv th threshold or above the selected ov th threshold. the reset output deasserts after the specified timeout peri- od when the monitored supply rises above the uv th threshold or drops below the ov th threshold. the push-pull versions are referenced to v cc . the max6760/max6761/max6762 monitor both v cc and v cc2 . an under/overvoltage condition on either voltage supply asserts the corresponding output. reset and uv are guaranteed to be in the correct logic state when v cc or v cc2 > 1v. internal reference 0.5v gnd ov monitor uv monitor ov th uv th uv ov uvin v cc ovin max6763/max6764 v+ r1 r2 r3 overvoltage asserts when undervoltage asserts when v+ x r3 r1 + r2 + r3 > 0.5v < 0.5v v+ x (r2 + r3) r1 + r2 + r3 figure 6. setting the under/overvoltage window mr reset, uv t d-mr t mr_p figure 7a. manual reset/ reset timing diagram t d-uv t rp v cc reset, uv (reset is the complement of reset) figure 7b. v cc /reset, uv timing diagram
max6754?ax6764 low-power, single/dual-voltage window detectors ______________________________________________________________________________________ 15 applications information microprocessor monitoring figure 8 shows a microprocessor monitoring circuit. an overvoltage condition on either the core or i/o supply turns the scr on, blowing the fuse to disconnect the circuit from the power source. an optional capacitor (c1) on the gate of the scr provides additional tran- sient immunity against nuisance trips. max6760 gnd set v cc2 v cc uv ov mr ovlatch push button reset nmi i/o dc-dc converter core dc-dc converter p i/o core fuse unregulated power source scr 100k ? 100k ? 100k ? *c1 1 f *optional. figure 8. microprocessor monitoring selector guide push-pull reset push-pull reset open-drain reset push-pull uv push-pull uv open-drain uv push-pull ov open-drain ov max6754 x max6755 ? max6756 x max6757 x ? max6758 ? ? max6759 x ? max6760 x ? max6761 ? ? max6762 x ? max6763 x x max6764 x ?
max6754?ax6764 low-power, single/dual-voltage window detectors 16 ______________________________________________________________________________________ ordering information (continued) part* temp range pin-package max6759 ut_d_-t -40? to +125? 6 sot23-6 max6760 ta_ _d_-t -40? to +125? 8 tdfn-8 max6761 ta_ _d_-t -40? to +125? 8 tdfn-8 max6762 ta_ _d_-t -40c to +125c 8 tdfn-8 max6763 ut-t -40? to +125? 6 sot23-6 max6764 ut-t -40? to +125? 6 sot23-6 table 1. window threshold voltage suffix guide single fixed v cc (max6754?ax6759) part no. suffix v cc nominal system voltage (v) l 5.0 t 3.3 r 3.0 z 2.5 w 1.8 table 2. window threshold voltage suffix guide dual fixed/adjustable (max6760/max6761/max6762) part no. suffix v cc nominal system voltage (v) v cc2 nominal system voltage (v) lt 5 3.3 lr 5 3.0 la 5 adj* tz 3.3 2.5 tw 3.3 1.8 ti 3.3 1.5 tg 3.3 1.2 te 3.3 0.9 ta 3.3 adj* rz 3.0 2.5 rw 3.0 1.8 ri 3.0 1.5 rg 3.0 1.2 re 3.0 0.9 ra 3.0 adj* zw 2.5 1.8 zi 2.5 1.5 zg 2.5 1.2 ze 2.5 0.9 za 2.5 adj* wi 1.8 1.5 wg 1.8 1.2 we 1.8 0.9 wa 1.8 adj* aa adj* * see the setting the adjustable nominal voltage threshold section. table 3. timeout period suffix guide active timeout period timeout period suffix min (ms) typ (ms) max (ms) d0 0.02 d3 100 185 320 * insert the threshold level suffixes for v cc and v cc2 (tables 1 and 2) after uk, ut, or ta. for the max6754?ax6759, insert only the v cc threshold suffix after the uk or ut. insert the reset timeout delay (table 3) after d to complete the part number. for example, the max6760taltd3-t provides a v cc threshold of 5v, a v cc2 threshold of 3.3v, and a 100ms minimum reset time- out period. sample stock is generally held on standard versions only (see the standard versions table). standard versions have an order increment requirement of 2500 pieces. nonstandard versions have an order increment requirement of 10,000 pieces. contact factory for availability. devices are available in both leaded and lead-free packaging. specify lead-free by replacing ?t?with ?t?when ordering.
max6754?ax6764 low-power, single/dual-voltage window detectors ______________________________________________________________________________________ 17 standard versions table part top mark max6754 ukld0 aeoc max6754ukld3 aejn max6754uktd0 aeod max6754uktd3 aejo MAX6754UKZD0 aejq max6754ukzd3 aeof max6754ukwd0 aeog max6754ukwd3 aejr max6755 ukld0 aeoh max6755ukld3 aejs max6755uktd0 aeoi max6755uktd3 aejt max6755ukzd0 aekv max6755ukzd3 aeok max6755ukwd0 aeol max6755ukwd3 aejw max6756 ukld0 aejx max6756ukld3 aeom max6756uktd0 aejy max6756uktd3 aeon max6756ukzd0 aeop max6756ukzd3 aeka max6756ukwd0 aekb max6756ukwd3 aeoq max6757 uttd0 abst max6757uttd3 abrb max6757utld0 abso max6757utld3 abrc max6757utzd0 abre max6757utzd3 absw max6757utwd0 absx max6757utwd3 abrf part top mark max6758 utld0 absy max6758utld3 abrg max6758uttd0 absz max6758uttd3 abrh max6758utzd0 abrj max6758utzd3 abtb max6758utwd0 abtc max6758utwd3 abrk max6759 utld0 abrl max6759utld3 abtd max6759uttd0 abrm max6759uttd3 abte max6759utzd0 abtg max6759utzd3 abro max6759utwd0 abrp max6759utwd3 abth max6760 taltd3 aio max6760talad3 ahi max6760tatzd3 air max6760tatwd3 ahj max6760tatad3 ait max6760tarad3 aiv max6760tazwd3 aix max6760tazad3 aiz max6760tawed3 ajb max6760tawad3 ahl
max6754?ax6764 low-power, single/dual-voltage window detectors 18 ______________________________________________________________________________________ standard versions table (continued) part top mark max6761 taltd3 ajd max6761talad3 ahn max6761tatzd3 ajg max6761tatwd3 aho max6761tatad3 aji max6761tarad3 ajk max6761tazwd3 ajm max6761tazad3 ajo max6761tawed3 ajq max6761tawad3 ahq part top mark max6762 taltd3 ajt max6762talad3 ahr max6762tatzd3 ajw max6762tatwd3 ajy max6762tatad3 aka max6762tarad3 akb max6762tazwd3 aht max6762tazad3 ake max6762tawed3 akf max6762tawad3 akh max6763 ut abrq max6764 ut abrr
max6754?ax6764 low-power, single/dual-voltage window detectors ______________________________________________________________________________________ 19 chip information transistor count: 726 process: bicmos gnd reset (reset) mr 15 set v cc max6754 max6755 max6756 sot23 ( ) max6755 only. top view 2 34 gnd uv (uv) 16 set 5ov v cc max6757 max6758 max6759 sot23 ( ) max6758 only. 2 34 mr 1 2 3 4 8 7 6 5 mr ovlatch uv (uv) ov set v cc2 gnd v cc max6760 max6761 max6762 tdfn ( ) max6761 only. gnd uv 16 ovin 5ov v cc max6763 max6764 sot23 2 34 uvin pin configurations
max6754?ax6764 low-power, single/dual-voltage window detectors 20 ______________________________________________________________________________________ 6, 8, &10l, dfn thin.eps h 1 2 21-0137 package outline, 6,8,10 & 14l, tdfn, exposed pad, 3x3x0.80 mm common dimensions symbol min. max. a0.700 .80 d2.903 .10 e2.903 .10 a1 0.00 0.05 l0.200 .40 pkg. code n d2 e2 e jedec spec b [(n/2)-1] x e package variations 0.25 min. k a2 0.20 ref. 2.300.10 1.500.10 6 t633-1 0.95 bsc mo229 / weea 1.90 ref 0.400.05 1.95 ref 0.300.05 0.65 bsc 2.300.10 8 t833-1 2.00 ref 0.250.05 0.50 bsc 2.300.10 10 t1033-1 2.40 ref 0.200.05 - - - - 0.40 bsc 1.700.10 2.300.10 14 t1433-1 1.500.10 1.500.10 mo229 / weec mo229 / weed-3 0.40 bsc - - - - 0.200.05 2.40 ref t1433-2 14 2.300.10 1.700.10 t633-2 6 1.500.10 2.300.10 0.95 bsc mo229 / weea 0.400.05 1.90 ref t833-2 8 1.500.10 2.300.10 0.65 bsc m o229 / weec 0.300.05 1.95 ref t833-3 8 1.500.10 2.300.10 0.65 bsc m o229 / weec 0.300.05 1.95 ref -drawing not to scale- h 2 2 21-0137 package outline, 6,8,10 & 14l, tdfn, exposed pad, 3x3x0.80 mm 2.300.10 mo229 / weed-3 2.00 ref 0.250.05 0.50 bsc 1.500.10 10 t1033-2 package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .)
max6754?ax6764 low-power, single/dual-voltage window detectors ______________________________________________________________________________________ 21 sot-23 5l .eps e 1 1 21-0057 package outline, sot-23, 5l package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .)
max6754?ax6764 low-power, single/dual-voltage window detectors maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 22 ____________________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. 6lsot.eps package outline, sot 6l body 21-0058 1 1 g package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .)

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