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general description the max6701?ax6708 microprocessor (p) supervisory circuits reduce the complexity and components required to monitor power-supply functions in ? systems. these devices significantly improve system reliability and accu- racy compared to separate ics or discrete components. the max6701?ax6708 family provides four functions: a reset output during power-up, power-down, and brownout conditions; an independent watchdog output that goes low if the watchdog input has not been toggled within 1.6s; a 0.62v threshold detector for power-fail warning; and an active-low manual reset input. the max6701?ax6708 family offers several pinout options to accommodate a variety of multivoltage micro- processor supervision applications. the max6701(a)/max6702(a)/max6703(a) monitor three supply voltages (one fixed threshold and two adjustable) to drive a single reset output and include a manual reset input and a watchdog timer with an inde- pendent output. the max6704 monitors a single-supply voltage to drive complementary reset outputs and includes an independent adjustable power-fail-in/power- fail-out comparator, a manual reset input, and a reset- based watchdog timer. the max6705(a)/max6706(a)/ max6707(a) monitor a single-supply voltage to drive a single reset output and include an independent adjustable power-fail-in/power-fail-out comparator, a manual reset input, and a watchdog timer with an inde- pendent output. the max6708 is the same as the max6704 but without the watchdog timer function. see the detailed description for differences between non-a and a versions. applications computers controllers intelligent instruments automotive systems critical ? power monitoring white goods networking telecommunications features small 8-pin sot23 package precision monitoring of +5.0v, +3.3v, +3.0v, +2.5v supply voltages 140ms reset timeout delay power-fail input with independent output; monitor inputs down to 0.62v (max6704?ax6708) dual adjustable reset input for triple-voltage monitoring (max6701(a)/max6702(a)/max6703(a)) 1.6s watchdog timeout period (max6701(a)?ax6707(a)) independent watchdog output (max6701(a)/max6702(a)/max6703(a)/ max6705(a)/ max6706(a)/max6707(a)) manual reset input four reset output stage options active low push-pull (max6701(a), max6705(a)) active low open drain (max6703(a), max6707(a)) active high push-pull (max6702(a), max6706(a)) dual active low/high push-pull (max6704, max6708) guaranteed reset valid to v cc = 1v immune to short falling v cc transients low cost, few external components max6701?8/max6701a?3a/05a?7a low-voltage, sot23 ? supervisors with power- fail in/out, manual reset, and watchdog timer ________________________________________________________________ maxim integrated products 1 wdi rst_in2 rst_in1 ( ) are for max6702(a) only. 1 2 8 7 wdo reset (reset) v cc gnd mr sot23 top view 3 4 6 5 max6701(a) max6702(a) max6703(a) pin configurations ordering information 19-1952; 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 max6701 _ka-t -40 c to +125 c 8 sot23-8 max6701a_ka-t -40 c to +125 c 8 sot23-8 insert the desired suffix letter (from the threshold suffix guide table) into the blank to complete the part number. all devices must be ordered in increments of 2500 pieces. sample stock is typically held on standard versions only. contact factory for availability. devices are available in both leaded and lead-free packaging. specify lead-free by replacing ?t?with ?t?when ordering. ordering information continued at end of data sheet. typical operating circuit and selector guide appear at end of data sheet. pin configurations continued at end of data sheet.
max6701?8/max6701a?3a/05a?7a low-voltage, sot23 ? supervisors with power- fail in/out, manual reset, and watchdog timer 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = +4.25v to +5.5v for l/m versions, v cc = +2.55v to +3.6v for the t/s/r versions, v cc = +2.1v to +2.75v for the z/y versions. t a = -40 c to +125 c, unless otherwise specified. 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. v cc ........................................................................-0.3v to +6.0v open-drain reset , wdo , pfo ...........................-0.3v to +6.0v push-pull reset, reset , wdo , pfo ........-0.3v to (v cc + 0.3v) mr , wdi, pfi, rst_in1, rst_in2 ..............-0.3v to (v cc + 0.3v) input current (v cc ) .............................................................20ma output current ( reset , reset, pfo , wdo ) .....................20ma continuous power dissipation (t a = +70 c) 8-pin sot23 (derate 8.9mw/ c above +70 c)............714mw operating temperature range .........................-40 c to +125 c junction temperature ......................................................+150 c storage temperature range .............................-65 c to +150 c lead temperature (soldering, 10s) .................................+300 c parameter symbol conditions min typ max units t a = 0 c to +125 c 1.0 5.5 operating voltage range v cc t a = -40 c to +125 c 1.2 5.5 v v cc < 5.5v, no load 12 25 v cc < 3.6v, no load 9 20 supply current mr unconnected i cc v cc < 3.6v, no load (max6708 only) 6 20 a t a = -40 c to +85 c 4.50 4.63 4.75 max670_l/max670_al t a = -40 c to +125 c 4.47 4.78 t a = -40 c to +85 c 4.25 4.38 4.50 m ax 670_m /m ax 670_am t a = -40 c to +125 c 4.22 4.53 t a = -40 c to +85 c 3.00 3.08 3.15 max670_t/max670_at t a = -40 c to +125 c 2.97 3.17 t a = -40 c to +85 c 2.85 2.93 3.00 max670_s/max670_as t a = -40 c to +125 c 2.83 3.02 t a = -40 c to +85 c 2.55 2.63 2.70 max670_r/max670_ar t a = -40 c to +125 c 2.53 2.72 t a = -40 c to +85 c 2.25 2.32 2.38 max670_z/max670_az t a = -40 c to +125 c 2.24 2.40 t a = -40 c to +85 c 2.12 2.19 2.25 v cc reset threshold (v cc falling) v th max670_y/max670_ay t a = -40 c to +125 c 2.11 2.27 v reset threshold temperature coefficient ? v th 60 ppm/ c v cc to reset output delay v cc falling at 10mv/s 12 s t a = -40 c to +85 c 140 200 280 reset timeout period t rp t a = -40 c to +125 c 120 300 ms v cc falling to wdo delay m ax 6701( a) /m ax 6702( a) /m ax 6703( a) /m ax 6705( a) / m ax 6706( a) /m ax 6707( a) 5s t a = -40 c to +85 c 602 618 634 pfi, rst_in1, rst_in2 threshold v c c = 1.8v to 5.5v t a = -40 c to +125 c 593 642 mv pfi hysteresis 6mv
max6701?8/max6701a?3a/05a?7a low-voltage, sot23 ? supervisors with power- fail in/out, manual reset, and watchdog timer _______________________________________________________________________________________ 3 parameter symbol conditions min typ max units t a = -40 c to +85 c -50 +50 pfi, rst_in1, rst_in2 leakage current (note 2) t a = -40 c to +125 c -200 +200 na pfi to pfo delay t pf 1s v il 0.3 x v cc mr input voltage v ih 0.7 x v cc v mr minimum input pulse 1s mr glitch rejection 100 ns mr to reset delay t md 200 ns v cc rising to wdo delay max6701(a)/max6702(a)/max6703(a)/ max6705(a)/max6706(a)/max6707(a) 100 ns mr pullup resistance 25 50 75 k ? t a = -40 c to +85 c 1.12 1.6 2.4 watchdog timeout period t wd t a = -40 c to +125 c 0.96 2.52 s wdi pulse width t wdi (note 2) 50 ns v il 0.3 x v cc wdi input voltage v ih 0.7 x v cc v wdi input current i wdi wdi = 0v or v cc -1 +1 a v cc 1.0v, i sink = 50a, output asserted (t a = 0 c to +125 c) 0.3 v cc 1.2v, i sink = 100a, output asserted 0.3 v c c 2.55v , i s in k = 1.2m a, outp ut asser ted 0.3 reset , wdo output low (push-pull or open drain) v ol v c c 4.25v , i s in k = 3.2m a, outp ut asser ted 0.4 v v c c 1.80v , i s in k = 200a, outp ut asser ted 0.3 v c c 2.55v , i s in k = 1.2m a, outp ut asser ted 0.3 pfo output low (push-pull or open drain) v ol v c c 4.25v , i s in k = 3.2m a, outp ut asser ted 0.4 v v c c 2.7v , i s ou rc e = 500a, outp ut not asser ted 0.8 x v cc reset , wdo , pfo output high (push-pull only) v oh v c c 4.75v , i s ou rc e = 800a, outp ut not asser ted 0.8 x v cc v reset , wdo , pfo output open-drain leakage current i lkg v cc > v th , output not asserted 1.0 a v cc 1.0v, i source = 1a, reset asserted (t a = 0 c to +125 c) 0.8 x v cc v cc 1.2v, i source = 50a, reset asserted 0.8 x v cc v cc 2.55v, i source = 500a, reset asserted 0.8 x v cc reset output high (push-pull only) v oh v cc 4.25v, i source = 800a, reset asserted 0.8 x v cc v v cc 2.7v, i sink = 1.2ma, reset not asserted 0.3 reset output low (push-pull only) v ol v cc 4.75v, i sink = 3.2ma, reset not asserted 0.4 v electrical characteristics (continued) (v cc = +4.25v to +5.5v for l/m versions, v cc = +2.55v to +3.6v for the t/s/r versions, v cc = +2.1v to +2.75v for the z/y versions. t a = -40 c to +125 c, unless otherwise specified. typical values are at t a = +25 c.) (note 1) note 1: over-temperature limits are guaranteed by design and not production tested. devices are tested at t a = +25 c. note 2: guaranteed by design. not production tested.
max6701?8/max6701a?3a/05a?7a low-voltage, sot23 ? supervisors with power- fail in/out, manual reset, and watchdog timer 4 _______________________________________________________________________________________ typical operating characteristics (t a = +25 c, unless otherwise noted.) 0 4 12 8 16 20 -40 10 -15 35 60 85 supply current vs. temperature max6701 toc01 temperature ( c) supply current ( a) v cc = 5v v cc = 3.3v max6705(a) max6708 210 205 200 195 190 -40 10 -15 356085 reset timeout period vs. temperature max6701 toc02 temperature ( c) reset timeout period (ms) 20 15 10 5 0 -40 10 -15 35 60 85 v cc to reset output delay vs. temperature max6701 toc03 temperature ( c) v cc to reset output delay ( s) 1.70 1.65 1.60 1.55 1.50 -40 10 -15 356085 watchdog timeout period vs. temperature max6701 toc04 temperature ( c) watchdog timeout period (s) 0.95 0.98 0.97 0.96 0.99 1.00 1.01 1.02 1.03 1.04 1.05 -40 10 -15 356085 normalized reset threshold vs. temperature max6701 toc05 temperature ( c) normalized reset thresold 0 40 80 120 160 maximum v cc transient duration vs. reset threshold overdrive max6701 toc06 reset threshold overdrive (mv) maximum transient duration ( s) 0 10 20 30 40 50 60 max670_y reset occurs above line 0 25 50 75 100 0 800 1600 2400 400 1200 2000 2800 3200 output-voltage low vs. sink current max6701 toc07 sink current ( a) v ol (mv) v cc 4.25v 0 50 150 100 250 300 200 350 0 800 1200 400 1600 2000 2400 2800 3200 v cc - v oh vs. source current max6701 toc08 source current ( a) v cc - v oh (mv) v cc 4.25v
max6701?8/max6701a?3a/05a?7a low-voltage, sot23 ? supervisors with power- fail in/out, manual reset, and watchdog timer _______________________________________________________________________________________ 5 pin description pin max6701(a) max6702(a) max6703(a) max6704 max6705(a) max6706(a) max6707(a) max6708 name function 11 11 mr active-low, manual reset input, internal 50k ? pullup to v cc . pull low to force a reset. reset remains active as long as mr is low and the reset timeout period after mr goes high. leave unconnected or connect to v cc if unused. wdo deasserts when mr is low ( m ax 6701( a) /m ax 6702( a) /m ax 6703( a) / m ax 6705( a) / m ax 6706( a) /m ax 6707( a) onl y) . 22 22v cc s up p l y v ol tag e for m ax 6701 m ax 6708 and inp ut for p r i m ar y reset thr eshol d m oni tor . p ush- p ul l outp uts ar e p ow er ed b y v c c . 3 3 3 3 gnd ground 4 4 4 pfi power-fail voltage monitor input. high-impedance input for internal power-fail comparator. connect this pin to an external resistive-divider network to set the reset threshold voltage; 0.62v (typ) threshold. connect to gnd or v cc when not used. 555 pfo power-fail monitor output. open drain or push-pull active low. pfo goes low when pfi is less than 0.62v. 66 6 wdi watchd og inp ut. if wd i r em ai ns hi g h or l ow for l ong er than the w atchd og ti m eout p er i od , the i nter nal w atchd og ti m er r uns out and wdo i s asser ted . wdo i s asser ted l ow after each w atchd og over fl ow and r em ai ns l ow unti l the w atchd og ti m er i s cl ear ed ( the r eset outp ut i s not affected ) . the i nter nal w atchd og ti m er cl ear s w henever a v c c /rs t_in 1/rs t_in 2 r eset i s asser ted , the m anual r eset i s asser ted , or wd i sees a r i si ng or fal l i ng ed g e. the w atchd og ti m er r em ai ns cl ear ed unti l the r eset outp ut i s d easser ted . on the m ax 6704, res et p ul se asser ts for the r eset ti m eout p er i od after each w atchd og ti m eout over fl ow . the w atchd og ti m er cannot b e d i sab l ed . 6 n.c. no connection. not internally connected. 77 77 reset acti ve- low reset outp ut ( op en d r ai n or p ush- p ul l ) . res et chang es fr om hi g h to l ow w hen the v c c i np ut d r op s b el ow the sel ected r eset thr eshol d ( or rs t_in 1/ rs t_in 2 for the m ax 6701( a) /m ax 6702( a) /m ax 6703( a) , mr i s p ul l ed l ow , or the w atchd og tr i g g er s a r eset ( m ax 6704 onl y) . res et r em ai ns l ow for the r eset ti m eout p er i od after the r eset cond i ti ons ar e ter m i nated .
detailed description figures 1, 2, and 3 are functional diagrams for the max6705(a)/ max6706(a)/max6707(a), max6704/ max6708, and max6701(a)/ max6702(a)/max6703(a), respectively. reset output a microprocessor s (p s) reset input starts the p in a known state. the max6701 max6708 assert reset dur- ing power-up and prevent code execution errors during power-down or brownout conditions. on power-up, once v cc reaches 1v, reset is a guar- anteed logic low of 0.4v or less. as v cc rises, reset stays low. after v cc , rst_in1, or rst_in2 rise above the reset threshold, an internal timer holds reset low for about 200ms. reset pulses low whenever v cc dips below the reset threshold, including brownout condi- tions. if a brownout occurs in the middle of a previously initiated reset pulse, the pulse continues for at least another 140ms. on power-down, once v cc falls below the reset threshold, reset stays low and is guaranteed to be 0.4v or less, until v cc drops below 1v. the max6702(a)/max6704/max6706(a)/max6708 active-high reset output is the complement of the reset output, and is guaranteed to be valid with v cc down to 1v. max6701?8/max6701a?3a/05a?7a low-voltage, sot23 ? supervisors with power- fail in/out, manual reset, and watchdog timer 6 _______________________________________________________________________________________ pin description (continued) pin max6701(a) max6702(a) max6703(a) max6704 max6705(a) max6706(a) max6707(a) max6708 name function 8 8 wdo active-low watchdog output (open drain or push-pull). wdo is asserted whenever the watchdog times out and v cc or the reset inputs are below their respective thresholds. wdo deasserts after a valid wdi transition without a reset timeout period. in the a versions, wdo deasserts without a timeout delay when v cc , rst_in1, and rst_in2 rises above its threshold. pull mr low to assert wdo (max6701/max6702/ max6703/max6705/max6706/max6707 only). pull mr low to deassert wdo (max6701(a)/max6702(a)/max6703(a)/ max6705(a)/max6706(a)max6707(a) only). 7* 8 7* 8 reset active-high reset output (push-pull). reset changes from low to high when the v cc input drops below the selected reset threshold (or rst_in1/rst_in2 for max6701(a)/max6702(a)/ max6703(a), mr is pulled low, or the watchdog triggers a reset (max6704 only). reset remains high for the reset timeout period after the reset conditions are terminated. 4 rst_in1 input for user-adjustable v cc2 monitor. high-impedance input for second internal reset comparator. connect this pin to an external resistive-divider network to set the reset threshold voltage; 0.62v (typ) threshold. connect to v cc when not used. reset is asserted when either v cc , rst_in1, or rst_in2 are below threshold. 5 rst_in2 input for user-adjustable v cc3 monitor. high-impedance input for third internal reset comparator. connect this pin to an external resistive-divider network to set the reset threshold voltage; 0.62v (typ) threshold. connect to v cc when not used. reset is asserted when either v cc , rst_in1, or rst_in2 are below threshold. * reset active-high for the max6702(a)/max6706(a).
max6701?8/max6701a?3a/05a?7a low-voltage, sot23 ? supervisors with power- fail in/out, manual reset, and watchdog timer _______________________________________________________________________________________ 7 watchdog timer reset generator 8 wdi (max6704 only) 7 6 reset reset 5 pfo 3 0.62v v ref v cc 50k ? 1 mr 2 v cc 4 pfi max6704 max6708 gnd reset generator watchdog timer reset (reset) wdo wdi 0.62v 0.62v v ref mr v cc rst_in1 rst_in2 v cc 50k ? max6701(a) max6702(a) max6703(a) ( ) are for max6702(a) only. figure 2. max6704/max6708 functional diagram figure 3. max6701(a)/max6702(a)/max6703(a) functional diagram watchdog timer reset generator v cc 50k ? 8 wdo 7 reset (reset) 5 pfo gnd 3 0.62v ( ) are for max6706(a) only. 6 wdi 1 mr 2 v v ref cc 4 pfi max6705(a) max6706(a) max6707(a) figure 1. max6705(a)/max6706(a)/max6707(a) functional diagram t rp t rp v cc 0v reset wdo v cc 0v wdi v cc 0v mr mr externally driven low v cc 0v v cc v th v th t md note: the max6706 reset output is the inverse of the reset shown. figure 4. max6705/max6706/max6707 reset , mr , wdo , and wdi timing
max6701?8/max6701a?3a/05a?7a low-voltage, sot23 ? supervisors with power- fail in/out, manual reset, and watchdog timer 8 _______________________________________________________________________________________ standard- vs. a-version comparison the max6701/max6702/max6703/max6705/max6706/ max6707s wdo latches low when one of the following events occurs: ? the watchdog timer times out (1.6s, typ). ? v cc , rst_in1, or rst_in2 is below its reset threshold. ? mr is pulled low. ? wdo only deasserts with a valid wdi transition. themax6701(a)/max6702(a)/max6703(a)/max6705(a)/ max6706(a)/max6707(a)s wdo asserts when either v cc , rst_in1, or rst_in2 is below its reset threshold. wdo deasserts without a timeout delay when the undervoltage situation has expired. wdo is latched low when the watchdog timer elapses without seeing a wdi transition. wdo deasserts with a valid wdi transition or by pulling mr low. see figures 4 and 5 for standard-version timing. see figures 6 and 7 for a-version timing. watchdog timer the max6701 max6707 watchdog circuit monitors the p s activity. if the p does not toggle the wdi within 1.6s, wdo goes low. when reset is asserted, the watchdog timer stays cleared and does not count. as soon as reset is released, the timer starts counting. wdo deasserts after a valid transition is detected at wdi. pulses as short as 50ns can be detected. typically, wdo is connected to the nmi input of a p. when v cc , rst_in1, or rst_in2 drop below the reset threshold, wdo goes low whether or not the watchdog timer has timed out. normally this would trigger an nmi, but reset goes low simultaneously, and thus overrides the nmi. the max6704 watchdog circuit does not have an inde- pendent watchdog output ( wdo ). if the p does not toggle the watchdog input within 1.6s, the max6704 asserts a reset output pulse for the reset timeout period. manual reset the manual reset input ( mr ) allows reset to be trig- gered by a pushbutton switch. the switch is effectively debounced by the reset pulse width. mr is cmos logic compatible, so it can be driven by an external logic line. mr can be used to force a watchdog timeout to generate a reset pulse in the max6701(a)/max6702(a)/ max6703(a)/max6705(a)/max6706(a)/max6707(a) by connecting wdo to mr . power-fail comparator the uncommitted power-fail comparator can be used for various purposes because its noninverting input and output are externally available. the inverting input is internally connected to a 0.62v reference. to build an early warning circuit for power failure, connect the pfi pin to a voltage-divider (see the typical operating circuit ). choose the voltage-divider ratio so that the voltage at pfi falls below 0.62v just before the regulator drops out. use pfo to interrupt the p so it can prepare for an orderly power-down. the low-input current at this pin allows for large resistor values in the divider. t wd t wd +5v 0v wdi +5v 0v wdo +5v 0v reset +5v 0v (reset) t rp reset externally triggered by mr +5v 0v mr ( ) are for max6702/max6706 only. t wdi t rp t rp +5v 0v reset wdo +5v 0v mr t mr +5v 0v v cc v th v th t md figure 5. max6701/max6702/max6703/max6705/max6706/ max6707 watchdog figure 6. max6701(a)/max6702(a)/max6703(a)/max6705(a)/ max6706(a)/max6707(a) reset, mr, and wdo timing with wdi three-stated
reset input the max6701(a)/max6702(a)/max6703(a) include two adjustable reset inputs for monitoring up to a total of three system voltages (including v cc ). the thresholds for the monitored rst_in supplies are externally set with resistor-divider networks (figure 8). the reset out- put is asserted if any of the monitored supplies (v cc , rst_in1, or rst_in2) go below its specified threshold and remains asserted for the reset timeout period after all supplies are above their thresholds. applications information ensuring a valid reset output down to v cc = 0 when v cc falls below 1v, the max6701 max6708 reset output no longer sinks current it becomes an open circuit. high-impedance cmos logic inputs can drift to undetermined voltages if left undriven. if a pull- down resistor is added to the reset pin as shown in figure 9, any stray charge or leakage currents are drained to ground, holding reset low. a resistor value (r1) is not critical; 100k ? is large enough not to load reset and small enough to pull reset to ground. this application works for push-pull output only (not for open-drain resets). monitoring other system voltages other systems can be monitored by connecting a volt- age-divider to pfi and adjusting the ratio appropriately. in noisy systems, a capacitor between pfi and gnd reduces the power-fail circuit s sensitivity to high-fre- quency noise on the line being monitored. reset can be asserted on other voltages in addition to the v cc supply line. connect pfo to mr to initiate a reset out- put pulse when pfi drops below 0.62v. figure 10 shows the max6704 max6708 configured to assert a reset output when the secondary supply falls below the reset threshold. generating a reset from watchdog overflow connect wdo to mr to force a watchdog timeout to gen- erate a reset pulse for only the reset timeout period on the max6701(a)/max6702(a)/max6703(a)/max6705(a)/ max6706(a)/max6707(a). when the max6704 watch- dog times out, reset outputs are automatically asserted (no external connections required). for the max6701/ max6702/max6703/max6705/max6706/max6707 non-a versions, do not connect wdo to mr ; this creates a locked condition. max6701?8/max6701a?3a/05a?7a low-voltage, sot23 ? supervisors with power- fail in/out, manual reset, and watchdog timer _______________________________________________________________________________________ 9 t wd t wd t wd +5v 0v wdi +5v 0v wdo +5v 0v reset +5v 0v (reset) t rp +5v 0v mr ( ) are for max6702(a)/max6706(a) only. t wdi figure 7. max6701(a)/max6702(a)/max6703(a)/max6705(a)/ max6706(a)/max6707(a) watchdog timing r1 r2 0.62v pfi, rst_in1, or rst_in2 v external 0.62 r1 = r2 x ( v ext-th - 1 ) r2 v ext-th = ( 1 + r1 ) x 0.62v where v ext-th is the external voltage trip level. max6701(a) max6708 figure 8. calculating adjustable voltage thresholds
max6701?8/max6701a?3a/05a?7a low-voltage, sot23 ? supervisors with power- fail in/out, manual reset, and watchdog timer 10 ______________________________________________________________________________________ threshold suffix guide suffix reset threshold (v) l 4.63 m 4.38 t 3.08 s 2.93 r 2.63 z 2.32 y 2.19 bold indicates standard version. r1 (100k ? ) reset max6701(a) max6704 max6705(a) max6708 figure 9. reset valid to ground circuit v cc pfi mr pfo reset 0.9v 3.3v max6704 max6708 i/o supply core supply p reset (reset) () are for max6704/max6706(a)/max6708 only. figure 10. monitoring other system voltages part reset pp low reset pp high reset od-low wdi wdo pfi, pfo rst_in1, rst_in2 max6701 ? ?? pp ? max6701a* ? ?? pp ? max6702 ? ?? pp ? max6702a* ? ?? pp ? max6703 ??? od ? max6703a* ??? od ? max6704 ?? ? ? pp max6705 ? ?? pp ? pp max6705a* ? ?? pp ? pp max6706 ? ?? pp ? pp max6706a* ? ?? pp ? pp max6707 ??? od ? od max6707a* ??? od ? od max6708 ?? ? pp selector guide pp = push-pull, od = open drain. * wdo deasserts when mr is pulled low. see the standard- vs. a-version comparison section for the differences on wdo .
max6701?8/max6701a?3a/05a?7a low-voltage, sot23 ? supervisors with power- fail in/out, manual reset, and watchdog timer ______________________________________________________________________________________ 11 v cc pfi mr pfo wdo reset unregulated dc max6705(a) max6706(a) max6707(a) pushbutton switch interrupt p regulator v cc reset nmi dc-dc wdi i/o typical operating circuit ( ) are for max6706(a) only. wdi pfo pfi 1 2 8 7 reset reset v cc gnd mr sot23 3 4 6 5 max6704 wdi pfo pfi 1 2 8 7 wdo reset (reset) v cc gnd mr sot23 3 4 6 5 max6705(a) max6706(a) max6707(a) n.c. pfo pfi 1 2 8 7 reset reset v cc gnd mr sot23 3 4 6 5 max6708 top view pin configurations (continued) chip information transistor count: 716 process: bicmos ordering information (continued) part temp range pin-package max6702 _ ka-t -40 c to +125 c 8 sot23-8 max6702a_ ka-t -40 c to +125 c 8 sot23-8 max6703 _ ka-t -40 c to +125 c 8 sot23-8 max6703a_ ka-t -40 c to +125 c 8 sot23-8 max6704 _ka-t -40 c to +125 c 8 sot23-8 max6705 _ka-t -40 c to +125 c 8 sot23-8 max6705a_ka-t -40 c to +125 c 8 sot23-8 max6706 _ka-t -40 c to +125 c 8 sot23-8 max6706a_ka-t -40 c to +125 c 8 sot23-8 max6707 _ka-t -40 c to +125 c 8 sot23-8 max6707a_ka-t -40 c to +125 c 8 sot23-8 max6708 _ka-t -40 c to +125 c 8 sot23-8 insert the desired suffix letter (from the threshold suffix guide table) into the blank to complete the part number. all devices must be ordered in increments of 2500 pieces. sample stock is typically held on standard versions only. contact factory for availability. devices are available in both leaded and lead-free packaging. specify lead-free by replacing ?t?with ?t?when ordering.
max6701?8/max6701a?3a/05a?7a low-voltage, sot23 ? supervisors with power- fail in/out, manual reset, and watchdog timer 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. 12 ____________________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. sot23, 8l .eps rev. document control no. approval proprietary information title: 3.00 2.60 e c e1 e between 0.08mm and 0.15mm from lead tip. 8. meets jedec mo178 variation ba. 8? 0.60 1.75 0.30 l2 0? e1 e l 1.50 e1 0.65 bsc. 1.95 ref. 0.25 bsc. gauge plane seating plane c c l pin 1 i.d. dot (see note 6) l c l c a2 e1 d detail "a" 5. coplanarity 4 mils. max. note: 7. solder thickness measured at flat section of lead 6. pin 1 i.d. dot is 0.3 mm ? min. located above pin 1. 4. package outline inclusive of solder plating. 3. package outline exclusive of mold flash & metal burr. heel of the lead parallel to seating plane c. 2. foot length measured from lead tip to upper radius of 1. all dimensions are in millimeters. l2 l a1 a 0.38 1.30 0.15 1.45 max 0.22 b 0.90 a2 0.00 a1 0.90 a min symbol 3.00 0.22 2.80 d 0.08 c see detail "a" l c b e e 1 21-0078 1 package outline, sot-23, 8l body 0 0 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 .)

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