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general description the MAX6730A?ax6735a single-/dual-/triple-voltage microprocessor (?) supervisors feature a watchdog timer and manual reset capability. the MAX6730A max6735a offer factory-set reset thresholds for moni- toring voltages from +0.9v to +5v and an adjustable reset input for monitoring voltages down to +0.63v. the combination of these features significantly improves system reliability and accuracy when compared to sep- arate ics or discrete components. the active-low reset output asserts and remains asserted for the reset timeout period after all the monitored volt- ages exceed their respective thresholds. multiple factory- set reset threshold combinations reduce the number of external components required. the MAX6730A/ max6731a monitor a single fixed voltage, the max6732a/ max6733a monitor two fixed voltages, and the max6734a/max6735a monitor two fixed voltages and one adjustable voltage. all devices are offered with six mini- mum reset timeout periods ranging from 1.1ms to 1120ms. the MAX6730A?ax6735a feature a watchdog timer with an independent watchdog output. the watchdog timer prevents system lockup during code execution errors. a watchdog startup delay of 54s after reset asserts allows system initialization during power-up. the watchdog operates in normal mode with a 1.68s delay after initialization. the MAX6730A/max6732a/ max6734a provide an active-low, open-drain watch- dog output. the max6731a/max6733a/max6735a provide an active-low, push-pull watchdog output. other features include a manual reset input (MAX6730A/ max6731a/max6734a/max6735a) and push-pull reset output (max6731a/max6733a/max6735a) or open- drain reset output (MAX6730A/max6732a/max6734a). the MAX6730A?ax6733a are offered in a tiny 6-pin sot23 package. the max6734a/max6735a are offered in an 8-pin, space-saving sot23 package. all devices are fully specified over the extended -40? to +125? temperature range. applications multivoltage systems telecom/networking equipment computers/servers portable/battery-operated equipment industrial equipment printer/fax set-top boxes features ? v cc 1 (primary supply) reset threshold voltages from +1.575v to +4.63v ? v cc 2 (secondary supply) reset threshold voltages from +0.79v to +3.08v ? adjustable rstin threshold for monitoring voltages down to +0.63v (max6734a/max6735a only) ? six reset timeout options ? watchdog timer with independent watchdog output 35s (min) initial watchdog startup period 1.12s (min) normal watchdog timeout period ? manual reset input (MAX6730A/max6731a/ max6734a/max6735a) ? guaranteed reset valid down to v cc 1 or v cc 2 = +0.8v ? push-pull reset or open-drain reset output ? immune to short v cc transients ? low supply current: 14a (typ) at +3.6v ? small 6-pin and 8-pin sot23 packages MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output ________________________________________________________________ maxim integrated products 1 ordering information 19-0605; rev 0; 8/06 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. all devices specified over the -40c to +125? operating tem- perature range. part* pin-package pkg code MAX6730A ut_d_ -t 6 sot23-6 u6-1 max6731a ut_d_ -t 6 sot23-6 u6-1 max6732a ut_ _d_ -t 6 sot23-6 u6-1 max6733a ut_ _d_ -t 6 sot23-6 u6-1 max6734a ka_ _d_ -t 8 sot23-8 k8s-3 max6735a ka_ _d_ -t 8 sot23-8 k8s-3 typical operating circuit and pin configurations appear at end of data sheet. * note: insert the threshold level suffixes for v cc 1 and v cc 2 (table 1) after ?t?or ?a.?for the MAX6730A/max6731a, insert only the v cc 1 threshold suffix after the ?t.?insert the reset timeout delay (table 2) after ??to complete the part num- ber. for example, the max6732autltd3-t provides a v cc 1 threshold of +4.625v, a v cc 2 threshold of +3.075v, and a 210ms reset timeout 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 require- ment of 10,000 pieces. contact factory for availability. devices are available in both leaded and lead-free packaging. specify lead-free by replacing ??with ?t?when ordering.
MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc 1 = v cc 2 = +0.8v to +5.5v, t a = -40? to +125?, unless otherwise noted. typical values are at t a = +25?.) (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. parameter sym b o l conditions min typ max units supply voltage v cc 1, v cc 2 0.8 5.5 v v cc 1 < +5.5v, all i/o connections open, outputs not asserted 15 39 i cc 1 v cc 1 < +3.6v, all i/o connections open, outputs not asserted 10 28 v cc 2 < +3.6v, all i/o connections open, outputs not asserted 411 supply current i cc 2 v cc 2 < +2.75v, all i/o connections open, outputs not asserted 39 ? l (falling) 4.500 4.625 4.750 m (falling) 4.250 4.375 4.500 t (falling) 3.000 3.075 3.150 s (falling) 2.850 2.925 3.000 r (falling) 2.550 2.625 2.700 z (falling) 2.250 2.313 2.375 y (falling) 2.125 2.188 2.250 w (falling) 1.620 1.665 1.710 v cc 1 reset threshold v th 1 v (falling) 1.530 1.575 1.620 v v cc 1, v cc 2, rstin, mr , wdi to gnd .....................-0.3v to +6v rst , wdo to gnd (open drain)...............................-0.3v to +6v rst , wdo to gnd (push-pull) .................-0.3v to (v cc 1 + 0.3v) input current/output current (all pins) ...............................20ma continuous power dissipation (t a = +70?) 6-pin sot23-6 (derate 8.7mw/? above +70?) ........696mw 8-pin sot23-8 (derate 8.9mw/? above +70?) ........714mw operating temperature range .........................-40? to +125? storage temperature range .............................-65? to +150? junction temperature ......................................................+150? lead temperature (soldering, 10s) .................................+300?
MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output _______________________________________________________________________________________ 3 electrical characteristics (continued) (v cc 1 = v cc 2 = +0.8v to +5.5v, t a = -40? to +125?, unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter sym b o l conditions min typ max units t (falling) 3.000 3.075 3.150 s (falling) 2.850 2.925 3.000 r (falling) 2.550 2.625 2.700 z (falling) 2.250 2.313 2.375 y (falling) 2.125 2.188 2.250 w (falling) 1.620 1.665 1.710 v (falling) 1.530 1.575 1.620 i (falling) 1.350 1.388 1.425 h (falling) 1.275 1.313 1.350 g (falling) 1.080 1.110 1.140 f (falling) 1.020 1.050 1.080 e (falling) 0.810 0.833 0.855 v cc 2 reset threshold v th 2 d (falling) 0.765 0.788 0.810 v reset threshold tempco 20 ppm/ o c reset threshold hysteresis v hyst referenced to v th typical 0.5 % v cc _ to rst output delay t rd v cc 1 = (v th 1 + 100mv) to (v th 1 - 100mv) or v cc 2 = (v th 2 + 75mv) to (v th 2 - 75mv) 45 ? d1 1.1 1.65 2.2 d2 8.8 13.2 17.6 d3 140 210 280 d5 280 420 560 d6 560 840 1120 reset timeout period t rp d4 1120 1680 2240 ms adjustable reset comparator input (max6734a/max6735a) rstin input threshold v rstin 611 626.5 642 mv rstin input current i rstin -100 +100 na rstin hysteresis 3mv rstin to reset output delay t rstind v rstin to (v rstin - 30mv) 22 ? manual reset input (MAX6730A/max6731a/max6734a/max6735a) v il 0.3 v cc 1 mr input threshold v ih 0.7 v cc 1 v mr minimum pulse width 1 s mr glitch rejection 100 ns mr to reset output delay t mr 200 ns mr pullup resistance 25 50 80 k ?
MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output 4 _______________________________________________________________________________________ electrical characteristics (continued) (v cc 1 = v cc 2 = +0.8v to +5.5v, t a = -40? to +125?, unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter sym b o l conditions min typ max units watchdog input t wd-l first watchdog period after reset timeout period 35 54 72 watchdog timeout period t wd-s normal mode 1.12 1.68 2.24 s wdi pulse width t wdi (note 2) 50 ns v il 0.3 v cc 1 wdi input voltage v ih 0.7 v cc 1 v wdi input current i wdi wdi = 0v or v cc 1-1+1a reset/watchdog output v cc 1 or v cc 2 +0.8v, i sink = 1?, output asserted 0.3 v cc 1 or v cc 2 +1.0v, i sink = 50?, output asserted 0.3 v cc 1 or v cc 2 +1.2v, i sink = 100?, output asserted 0.3 v cc 1 or v cc 2 +2.7v, i sink = 1.2ma, output asserted 0.3 rst / wdo output low voltage (push-pull or open drain) v ol v cc 1 or v cc 2 +4.5v, i sink = 3.2ma, output asserted 0.4 v v cc 1 +1.8v, i source = 200?, output not asserted 0.8 v cc 1 v cc 1 +2.7v, i source = 500?, output not asserted 0.8 v cc 1 rst / wdo output high voltage (push-pull only) v oh v cc 1 +4.5v, i source = 800?, output not asserted 0.8 v cc 1 v rst / wdo output open-drain leakage current output not asserted 0.5 ? note 1: devices tested at t a = +25?. overtemperature limits are guaranteed by design and not production tested. note 2: parameter guaranteed by design.
MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output _______________________________________________________________________________________ 5 0 4 2 10 8 6 16 14 12 20 18 -40 20 -10 50 -25 35 580 65 95 110 125 supply current vs. temperature (v cc 1 = +5v, v cc 2 = +3.3v) MAX6730A-35a toc01 temperature ( c) supply current ( a) total i cc 1 i cc 2 0 4 2 10 8 6 16 14 12 20 18 -40 20 -10 50 -25 35 580 65 95 110 125 supply current vs. temperature (v cc 1 = +3.3v, v cc 2 = +2.5v) MAX6730A-35a toc02 temperature ( c) supply current ( a) total i cc 1 i cc 2 0 4 2 10 8 6 16 14 12 20 18 -40 20 -10 50 -25 35 580 65 95 110 125 supply current vs. temperature (v cc 1 = +2.5v, v cc 2 = +1.8v) MAX6730A-35a toc03 temperature ( c) supply current ( a) total i cc 1 i cc 2 0 4 2 10 8 6 16 14 12 20 18 -40 20 -10 50 -25 35 580 65 95 110 125 supply current vs. temperature (v cc 1 = +1.8v, v cc 2 = +1.2v) MAX6730A-35a toc04 temperature ( c) supply current ( a) total i cc 1 i cc 2 0.998 1.000 0.999 1.003 1.002 1.001 1.006 1.005 1.004 1.008 1.007 -40 20 -10 50 -25 35 580 65 95 110 125 normalized threshold voltage vs. temperature MAX6730A-35a toc05 temperature ( c) normalized threshold voltage t ypical operating characteristics (v cc 1 = +5v, v cc 2 = +3.3v, t a = +25?, unless otherwise noted.)
MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output 6 _______________________________________________________________________________________ t ypical operating characteristics (continued) (v cc 1 = +5v, v cc 2 = +3.3v, t a = +25?, unless otherwise noted.) 12 14 20 18 16 24 22 -40 20 -10 50 -25 35 580 65 95 110 125 rstin to reset output delay vs. temperature MAX6730A-35a toc10 temperature ( c) rstin reset output delay ( s) maximum v cc_ transient duration vs. reset threshold overdrive MAX6730A-35a toc07 reset threshold overdrive (mv) maximum v cc_ transient duration ( s) 10 100 100 1000 10,000 10 11 000 rst asserts above this line mr to reset output delay MAX6730A-35a toc08 40ns/div mr 2v/div rst 2v/div 10 12 11 15 14 13 18 17 16 20 19 -40 20 -10 50 -25 35 580 65 95 110 125 v cc_ to reset output delay vs. temperature MAX6730A-35a toc09 temperature ( c) v cc_ to reset output delay ( s) 75mv overdrive 0.980 0.988 0.984 1.000 0.996 0.992 1.012 1.008 1.004 1.020 1.016 -40 20 -10 50 -25 35 580 65 95 110 125 normalized timeout period vs. temperature MAX6730A-35a toc06 temperature ( c) normalized timeout period
MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output _______________________________________________________________________________________ 7 pin description pin MAX6730A max6731a max6732a max6733a max6734a max6735a name function 111 rst active-low reset output. the MAX6730A/max6732a/max6734a provide an open-drain output. the max6731a/max6733a/max6735a provide a push-pull output. rst asserts low when any of the following conditions occur: v cc 1 or v cc 2 drops below its preset threshold, rstin drops below its reset threshold, or mr is driven low. open-drain versions require an external pullup resistor. 222 gnd ground 334 wdo active-low watchdog output. the MAX6730A/max6732a/max6734a provide an open-drain wdo output. the max6731a/max6733a/max6735a provide a push-pull wdo output. wdo asserts low when no low-to-high or high-to-low transition occurs on wdi within the watchdog timeout period (t wd ) or if an undervoltage-lockout condition exists for v cc 1, v cc 2, or rstin. wdo deasserts without a timeout period when v cc 1, v cc 2, and rstin exceed their reset thresholds, or when the manual reset input is deasserted. open-drain versions require an external pullup resistor. 45 mr active-low manual reset input. drive mr low to force a reset. rst remains asserted as long as mr is low and for the reset timeout period after mr releases high. mr has a 50k ? pullup resistor to v cc 1; leave mr open or connect to v cc 1 if unused. 553 wdi watchdog input. if wdi remains high or low for longer than the watchdog timeout period, the internal watchdog timer expires and the watchdog output asserts low. the internal watchdog timer clears whenever rst asserts or a rising or falling edge on wdi is detected. the watchdog has an initial watchdog timeout period (35s min) after each reset event and a short timeout period (1.12s min) after the first valid wdi transition. floating wdi does not disable the watchdog timer function. 668 v cc 1 primary supply-voltage input. v cc 1 provides power to the device when it is greater than v cc 2. v cc 1 is the input to the primary reset threshold monitor. ? 6 v cc 2 secondary supply-voltage input. v cc 2 provides power to the device when it is greater than v cc 1. v cc 2 is the input to the secondary reset threshold monitor. 7 rstin undervoltage reset comparator input. rstin provides a high-impedance comparator input for the adjustable reset monitor. rst asserts low if the voltage at rstin drops below the 626mv internal reference voltage. connect a resistive voltage-divider to rstin to monitor voltages higher than 626mv. connect rstin to v cc 1 or v cc 2 if unused.
MAX6730A?ax6735a detailed description supply voltages the MAX6730A?ax6735a microprocessor (?) super- visors maintain system integrity by alerting the ? to fault conditions. the MAX6730A?ax6735a monitor one to three supply voltages in ?-based systems and assert an active-low reset output when any monitored supply voltage drops below its preset threshold. the output state remains valid for v cc 1 or v cc 2 greater than +0.8v. threshold levels the two-letter code in the reset voltage threshold suffix guide (table 1) indicates the threshold level combinations for v cc 1 and v cc 2. reset output the MAX6730A?ax6735a feature an active-low reset output ( rst ). rst asserts when the voltage at either v cc 1 or v cc 2 falls below the voltage threshold level, v rstin drops below its threshold, or mr is driven low (figure 1). rst remains low for the reset timeout period (table 2) after v cc 1, v cc 2, and rstin increase above their respective thresholds and after mr releases high. whenever v cc 1, v cc 2, or rstin go below the reset threshold before the end of the reset timeout period, the internal timer restarts. the MAX6730A/max6732a/ max6734a provide an open-drain rst output, and the max6731a/max6733a/max6735a provide a push-pull rst output. single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output 8 _______________________________________________________________________________________ table 1. reset voltage threshold suffix guide** part number suffix v cc 1 nominal voltage threshold(v) v cc 2 nominal voltage threshold (v) lt 4.625 3.075 ms 4.375 2.925 mr 4.375 2.625 tz 3.075 2.313 sy 2.925 2.188 ry 2.625 2.188 tw 3.075 1.665 sv 2.925 1.575 rv 2.625 1.575 ti 3.075 1.388 sh 2.925 1.313 rh 2.625 1.313 tg 3.075 1.110 sf 2.925 1.050 rf 2.625 1.050 te 3.075 0.833 sd 2.925 0.788 rd 2.625 0.788 zw 2.313 1.665 yv 2.188 1.575 zi 2.313 1.388 yh 2.188 1.313 zg 2.313 1.110 yf 2.188 1.050 ze 2.313 0.833 yd 2.188 0.788 wi 1.665 1.388 vh 1.575 1.313 wg 1.665 1.110 vf 1.575 1.050 we 1.665 0.833 vd 1.575 0.788 ** standard versions are shown in bold and are available in a d3 timeout option only. standard versions require 2500-piece order increments and are typically held in sample stock. there is a 10,000-piece order increment on nonstandard versions. other threshold voltages may be available; contact factory for availability. table 2. reset timeout period suffix guide active timeout period timeout period suffix min (ms) max (ms) d1 1.1 2.2 d2 8.8 17.6 d3 140 280 d5 280 560 d6 560 1120 d4 1120 2240
manual reset input many ?-based products require manual reset capabil- ity, allowing the operator, a test technician, or external logic circuitry to initiate a reset. a logic-low on mr asserts the reset output, clears the watchdog timer, and deasserts the watchdog output. reset remains asserted while mr is low and for the reset timeout peri- od (t rp ) after mr returns high. an internal 50k ? pullup resistor allows mr to be left open if unused. drive mr with cmos-logic levels or with open-drain/collector out- puts. connect a normally open momentary switch from mr to gnd to create a manual reset function; external debounce circuitry is not required. connect a 0.1? capacitor from mr to gnd to provide additional noise immunity when driving mr over long cables or if the device is used in a noisy environment. adjustable input voltage (rstin) the max6734a/max6735a provide an additional high- impedance comparator input with a 626mv threshold to monitor a third supply voltage. to monitor a voltage higher than 626mv, connect a resistive divider to the circuit as shown in figure 2 to establish an externally controlled threshold voltage, v ext_th . v = 626mv ext_th + () rr r 12 2 MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output _______________________________________________________________________________________ 9 t rp t rp v th v cc (min) v cc 1, v cc 2 rstin rst wdo mr figure 1. rst , wdo , and mr timing diagram max6734a max6735a v ext_th gnd rstin r1 r2 figure 2. monitoring a third voltage
MAX6730A?ax6735a the rstin comparator derives power from v cc 1, and the input voltage must remain less than or equal to v cc 1. low leakage current at rstin allows the use of large-valued resistors, resulting in reduced power con- sumption of the system. watchdog the watchdog feature monitors ? activity through the watchdog input (wdi). a rising or falling edge on wdi within the watchdog timeout period (t wd ) indi- cates normal ? operation. wdo asserts low if wdi remains high or low for longer than the watchdog timeout period. floating wdi does not disable the watchdog timer. the MAX6730A?ax6735a include a dual-mode watchdog timer to monitor ? activity. the flexible time- out architecture provides a long-period initial watchdog mode, allowing complicated systems to complete lengthy boots, and a short-period normal watchdog mode, allowing the supervisor to provide quick alerts when processor activity fails. after each reset event (v cc power-up, brownout, or manual reset), there is a long initial watchdog period of 35s (min). the long watchdog period mode provides an extended time for the system to power up and fully initialize all ? and system components before assuming responsibility for routine watchdog updates. the usual watchdog timeout period (1.12s min) begins after the initial watchdog timeout period (t wd-l ) expires or after the first transition on wdi (figure 3). during nor- mal operating mode, the supervisor asserts the wdo output if the ? does not update the wdi with a valid transition (high to low or low to high) within the standard timeout period (t wd-s ) (1.12s min). connect mr to wdo to force a system reset in the event that no rising or falling edge is detected at wdi within the watchdog timeout period. wdo asserts low when no edge is detected by wdi, the rst output asserts low, the watchdog counter immediately clears, and wdo returns high. the watchdog counter restarts, using the long watchdog period, when the reset timeout period ends (figure 4). ensuring a valid reset output down to v cc = 0v the MAX6730A?ax6735a guarantee proper opera- tion down to v cc = +0.8v. in applications that require valid reset levels down to v cc = 0v, use a 100k ? pull- down resistor from rst to gnd. the resistor value used is not critical, but it must be large enough not to load the reset output when v cc is above the reset threshold. for most applications, 100k ? is adequate. note that this configuration does not work for the open- drain outputs of MAX6730A/max6732a/max6734a. single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output 10 ______________________________________________________________________________________ t rp v th v cc (min) v cc 1, v cc 2 rstin rst wdo wdi t wd-s t wd-s applications information interfacing to ?s with bidirectional reset pins microprocessors with bidirectional reset pins can inter- face directly with the open-drain rst output options. however, conditions might occur in which the push-pull output versions experience logic contention with the bidirectional reset pin of the ?. connect a 10k ? resis- tor between rst and the ?? reset i/o port to prevent logic contention (figure 5). falling v cc transients the MAX6730A?ax6735a ? supervisors are relative- ly immune to short-duration falling v cc _ transients (glitches). small glitches on v cc _ are ignored by the MAX6730A?ax6735a, preventing undesirable reset pulses to the ?. the typical operating characteristics show maximum v cc_ transient duration vs. reset MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output ______________________________________________________________________________________ 11 t rp >t wd-s t mr MAX6730A?ax6735a threshold overdrive graph, for which reset pulses are not generated. the graph was produced using falling v cc _ pulses, starting above v th and ending below the reset threshold by the magnitude indicated (reset threshold overdrive). the graph shows the maximum pulse width that a falling v cc transient typically might have without causing a reset pulse to be issued. as the amplitude of the transient increases (i.e., goes further below the reset threshold), the maximum allowable pulse width decreases. a 0.1? bypass capacitor mounted close to v cc _ provides additional transient immunity. watchdog software considerations setting and resetting the watchdog input at different points in the program rather than ?ulsing?the watch- dog input high-low-high or low-high-low helps the watchdog timer closely monitor software execution. this technique avoids a ?tuck?loop, in which the watchdog timer continues to be reset within the loop, preventing the watchdog from timing out. figure 6 shows an example flow diagram in which the i/o dri- ving the watchdog input is set high at the beginning of the program, set low at the beginning of every subrou- tine or loop, and then set high again when the program returns to the beginning. if the program ?angs?in any subroutine, the i/o continually asserts low (or high), and the watchdog timer expires, issuing a reset or interrupt. single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output 12 ______________________________________________________________________________________ start set wdi high program code return subroutine completed hang in subroutine subroutine or program loop set wdi low figure 6. watchdog flow diagram MAX6730A max6735a v ref reset timeout period reset output driver watchdog timer ref v cc 1 v ref / 2 gnd v cc 1 mr v cc 1 v cc 1 v cc 1 v cc 2 mr pullup v cc 1 v cc 2 rstin rst wdo wdi functional diagram
MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output ______________________________________________________________________________________ 13 standard versions part top mark MAX6730A utld3-t +acix MAX6730Autsd3-t +acja MAX6730Autrd3-t +aciy MAX6730Autzd3-t +acjf MAX6730Autvd3-t +acjc max6731a utld3-t +acjg max6731auttd3-t +acjj max6731autsd3-t +acji max6731autrd3-t +acjh max6731autzd3-t +acjl max6731autvd3-t +acjk max6732a utltd3-t +achu max6732autsyd3-t +achz max6732autsvd3-t +achy max6732autrvd3-t +achv max6732autshd3-t +achx max6732auttgd3-t +acia max6732autsdd3-t +achw max6732autzwd3-t +acih max6732autyhd3-t +acif max6732autzgd3-t +acig max6732autydd3-t +acie max6732autvhd3-t +acic max6732autwgd3-t +acid max6732autvdd3-t +acib max6733a utltd3-t +acii max6733autsyd3-t +acin max6733autsvd3-t +acim max6733autrvd3-t +acij max6733autshd3-t +acil max6733auttgd3-t +acio max6733autsdd3-t +acik max6733autzwd3-t +aciw max6733autyhd3-t +aciu part top mark max6733autzgd3-t +aciv max6733autydd3-t +acit max6733autvhd3-t +acir max6733autwgd3-t +acis max6733autvdd3-t +aciq max6734a kaltd3-t +aens max6734akasyd3-t +aenz max6734akasvd3-t +aeny max6734akarvd3-t +aenu max6734akashd3-t +aenx max6734akatgd3-t +aeoa max6734akasdd3-t +aenv max6734akazwd3-t +aeoi max6734akayhd3-t +aeog max6734akazgd3-t +aeoh max6734akaydd3-t +aeof max6734akavhd3-t +aeod max6734akawgd3-t +aeoe max6734akavdd3-t +aeoc max6735a kaltd3-t +aeoj max6735akasyd3-t +aeoo max6735akasvd3-t +aeon max6735akarvd3-t +aeok max6735akashd3-t +aeom max6735akatgd3-t +aeop max6735akasdd3-t +aeol max6735akazwd3-t +aeox max6735akazid3-t +aeow max6735akayhd3-t +aeou max6735akazgd3-t +aeov max6735akaydd3-t +aeot max6735akavhd3-t +aeor max6735akawgd3-t +aeos max6735akavdd3-t +aeoq note: sample stock is generally held on standard versions only. 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 of nonstan dard versions.
MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output 14 ______________________________________________________________________________________ ___________________chip information transistor count: 1073 process: bicmos gnd mr wdo 16 v cc 1 5 wdi rst MAX6730A max6731a sot23-6 top view 2 34 gnd v cc 2 wdo 16 v cc 1 5 wdi rst max6732a max6733a sot23-6 sot23-8 2 34 v cc 2 mr wdo 1 2 8 7 v cc 1 rstin gnd wdi rst 3 4 6 5 max6734a max6735a pin configurations max6734a max6735a +0.9v v core +3.3v +1.8v mr gnd rstin rst wdi wdo pushbutton switch reset p nmi i/o v cc (i/o) v dd (memory) v cc 1 v cc 2 gnd t ypical operating circuit selector guide part number voltage monitors rst output manual reset watchdog input watchdog output MAX6730A 1 open drain ? open drain max6731a 1 push-pull ? push-pull max6732a 2 open drain open drain max6733a 2 push-pull push-pull max6734a 3 open drain ? open drain max6735a 3 push-pull ? push-pull
MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output ______________________________________________________________________________________ 15 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 .) 6lsot.eps package outline, sot 6l body 21-0058 1 1 g
MAX6730A?ax6735a single-/dual-/triple-voltage ? supervisory circuits with independent watchdog output 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. 16 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2006 maxim integrated products is a registered trademark of maxim integrated products, inc. heaney 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 .) 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

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