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general description the max6854/max6855/max6856/max6858/max6860 max6869 ultra-low-current (170na, typ) microprocessor (?) supervisory circuits combine voltage monitoring, watchdog timer, and manual reset input functions in a 5- pin sot23 package. these devices assert a reset signal whenever the monitored voltage drops below the factory- trimmed reset threshold voltage, manual reset is assert- ed, or the watchdog timer expires. the reset output remains asserted for a minimum timeout period after v cc rises above the reset threshold and manual reset is deasserted. factory-trimmed reset threshold voltages are offered from +1.575v to +4.625v in approximately 100mv increments (see threshold suffix guide ). each device is offered with six minimum reset timeout options, ranging from 10ms to 1200ms. the max6854/max6855/max6856/max6858/max6860 max6869 are offered in a variety of configurations (see the selector guide ). the max6854/max6855/max6856/ max6861?ax6869 provide a manual reset input, mr . the max6864?ax6869 offer a watchdog timer that monitors activity at the wdi input to prevent code execu- tion errors. the max6864?ax6869 offer watchdog timeout options of 3.3s or 209s (typ). the max6861/ max6862/max6863 feature a pin-selectable reset delay period of 10ms or 150ms (min). push-pull active-low, push-pull active-high, and open-drain active-low reset outputs are available. applications portable/battery-powered equipment pdas/cell phones mp3 players/pagers glucose monitors/patient monitors features ? ultra-low 170na (typ) supply current ? reset thresholds from +1.575v to +4.625v in approximately 100mv increments ? six minimum reset timeout period options from 10ms to 1200ms ? manual reset option ? watchdog timer option ? pin-selectable 10ms/150ms (min) reset timeout period (max6861/max6862/max6863) ? immune to short v cc transients ? guaranteed reset valid to v cc = +1.1v ? three reset output options: push-pull reset push-pull reset open-drain reset ? no external components ? small 5-pin sot23 package ? pin compatible to the tps3836/tps3837/tps3838 (max6861/max6862/max6863) max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer ________________________________________________________________ maxim integrated products 1 ordering information part ? temp range pin-package max6854 uk_ _d_-t -40? to +85? 5 sot23-5 max6855 uk_ _d_-t -40? to +85? 5 sot23-5 19-3139; rev 2; 9/04 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. ordering information continued at end of data sheet. ? insert reset threshold suffix (see table 2, threshold suffix guide) after uk. insert the number corresponding to the desired reset timeout period (see table 4, reset timeout period) after d. note: sample stock is generally held on standard versions only (see table 5, standard versions table). standard versions have an order increment of 2500 pieces. nonstandard versions have an order increment of 10,000 pieces. contact factory for availability of nonstandard versions. pin configurations appear at end of data sheet. selector guide appears at end of data sheet. t ypical operating circuit max6864 max6867 p v cc v cc gnd gnd manual reset reset i/o v cc 0.1 f reset mr wdi
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = 1.2v to 5.5v, t a = -40? to +85?, unless otherwise specified. typical values are at v cc = 2.5v, 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. v cc , open-drain reset to gnd ..........................-0.3v to +6.0v mr , push-pull reset , reset, wdi, ct, i.c............................................-0.3v to (v cc + 0.3v) input current, output current (all pins)............................?0ma continuous power dissipation (t a = +70?) 5-pin sot23 (derate 7.1mw/? above +70?)............571mw operating temperature range ...........................-40? to +85? junction temperature .....................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? parameter symbol conditions min typ max units t a 0? 1.1 5.5 supply voltage v cc t a = -40? to +85? 1.2 5.5 v v cc = 5.0v 210 400 v cc = 3.3v 190 380 v cc > v th , no load, reset output deasserted (note 2) v cc = 1.8v 170 370 na supply current i cc v cc < v th , no load, reset output asserted 715a v cc reset threshold v th v cc falling (see table 2) v th - 2.5% v th v th + 2.5% v reset threshold hysteresis v hyst reset asserted to reset deasserted 0.5 %v th d1 10 15 25 d2 40 60 80 d3 150 225 300 d4 1200 1800 2400 d5 300 450 600 reset timeout period t rp v cc = v th + 150mv (figures 2 and 3) d6 600 900 1200 ms v cc to reset delay t rd v cc falling from (v th + 100mv) to (v th - 100mv) at 10mv/? 40 ? v cc 1.1v, i sink = 50?, reset asserted, t a 0? 0.3 v cc 1.2v, i sink = 100?, reset asserted 0.3 v ol v cc 2.12v, i sink = 1.2ma, reset asserted 0.3 v cc 1.71v, i source = 200?, reset deasserted, push-pull reset only 0.8 x v cc reset output voltage v oh v cc 2.38v, i source = 500?, reset deasserted, push-pull reset only 0.8 x v cc v open-drain reset leakage current i lkg reset deasserted 25 na
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer _______________________________________________________________________________________ 3 electrical characteristics (continued) (v cc = 1.2v to 5.5v, t a = -40? to +85?, unless otherwise specified. typical values are at v cc = 2.5v, t a = +25?.) (note 1) parameter symbol conditions min typ max units v cc 1.1v, i source = 10?, reset asserted, t a 0? 0.8 x v cc v cc 1.2v, i source = 10?, reset asserted 0.8 x v cc v cc 1.53v, i source = 200?, reset asserted 0.8 x v cc v oh v cc 2.12v, i source = 500?, reset asserted 0.8 x v cc v cc 1.71v, i sink = 500?, reset deasserted 0.3 reset output voltage v ol v cc 2.38v, i sink = 1.2ma, reset deasserted 0.3 v ct input current ct = gnd or v cc 20 na v ih 0.8 x v cc ct input voltage v il 0.2 x v cc v manual reset input v ih 0.7 x v cc mr input voltage v il 0.3 x v cc v mr minimum pulse width t mpw 1s mr glitch rejection 200 ns mr to reset delay t mrd 250 ns mr pullup resistance 51020k ? watchdog timer (max6864?ax6869) v ih 0.7 x v cc wdi input voltage v il 0.3 x v cc v wdi input current wdi = gnd or v cc 20 na wdi pulse width t wdi (note 3) 150 ns s 1.5 3.3 7.75 watchdog timeout period t wd l95 209 487 s note 1: devices are tested at t a = +25?. specifications for t a = -40? to +85? are guaranteed by design. note 2: for the max6864?ax6869, the watchdog period is 1s with t rise and t fall < 50ns. note 3: guaranteed by design.
normalized watchdog timeout period vs. temperature max6854 toc04 temperature ( c) normalized t wd 60 35 10 -15 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.4 -40 85 10 100 1000 maximum v cc transient duration vs. reset threshold overdrive max684 toc05 reset threshold overdrive (mv) transient duration ( s) 1000 0.1 10 1 100 reset occurs above this line v cc falling from v th +100mv normalized reset threshold voltage vs. temperature max6854 toc06 temperature ( c) normalized v th 60 35 10 -15 0.995 1.000 1.005 1.010 0.990 -40 85 v cc to reset delay vs. temperature max6854 toc07 temperature ( c) t rd ( s) 60 35 10 -15 30 40 50 60 70 20 -40 85 v cc = v th + 100mv to v th - 100mv max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer 4 _______________________________________________________________________________________ t ypical operating characteristics (v cc = +2.5v, t a = +25?, unless otherwise noted.) supply current vs. supply voltage max6854 toc01 v cc (v) 0.1 1.0 10.0 i cc ( a) 5.0 4.5 3.5 4.0 2.0 2.5 3.0 1.5 1.0 5.5 v th = 2.23v t a = +85 c t a = +25 c t a = -40 c supply current vs. temperature max6854 toc02 temperature ( c) i cc ( a) 60 35 10 -15 0.12 0.14 0.16 0.18 0.20 0.22 0.10 -40 85 reset is not asserted v th = 1.575v v cc = 5.5v v cc = 2.5v v cc = 3.3v v cc = 1.8v normalized reset timeout period vs. temperature max6854 toc03 temperature ( c) normalized t rp 60 35 10 -15 0.99 1.00 1.01 1.02 0.98 -40 85
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer _______________________________________________________________________________________ 5 output low voltage vs. sink current max6854 toc08 i sink ( a) v ol (v) 4000 3000 2000 1000 0.05 0.10 0.15 0.20 0.25 0.30 0 0 5000 v cc = 1.8v v cc = 3.3v v cc = 2.5v output high voltage vs. source current max6854 toc09 i source ( a) output high voltage (v cc - v oh ) (v) 800 600 400 200 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0 0 1000 v cc = 1.8v v cc = 3.3v v cc = 2.5v supply current vs. watchdog switching frequency max6854 toc10 watchdog switching frequency (hz) supply current ( a) 1m 100k 10k 1k 100 1 10 100 0.1 10 10m v cc = 2.5v v cc to reset delay max6854 toc11 10 s/div 200mv/div 1.7v 1.5v v cc reset 0 1v/div v th = 1.575v t rd manual reset delay max6854 toc12 200ns/div 1v/div mr reset 1v/div t mrd t ypical operating characteristics (continued) (v cc = +2.5v, t a = +25?, unless otherwise noted.)
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer 6 _______________________________________________________________________________________ max6854/max6855/max6856 pin description pin max6854/ max6856 max6855 name function 1 reset active-low open-drain or push-pull reset output. reset transitions from high to low when v cc drops below the selected reset threshold or mr is pulled low. reset remains low for the reset timeout period after v cc exceeds the device reset threshold and mr deasserts. push-pull reset outputs are referenced to v cc . open-drain reset outputs require an external pullup resistor. 2, 4 2, 4 gnd ground. connect all gnd inputs to the same potential. 33 mr active-low manual reset input. drive mr low to initiate a reset. the reset output remains asserted while mr is held low and for the reset timeout period after mr transitions high. leave mr unconnected or connect to v cc if unused. mr is internally pulled up to v cc through 10k ? . 55v cc supply voltage. input for v cc reset monitor. for noisy systems, bypass v cc with a 0.1? capacitor to gnd. ? reset active-high push-pull reset output. reset transitions from low to high when v cc drops below the selected reset threshold or mr is pulled low. reset remains high for the reset timeout period after v cc exceeds the device reset threshold and mr deasserts. reset is referenced to v cc . max6858/max6860 pin description pin max6858/ max6860 name function 1, 2 i.c. internally connected. for increased noise immunity, connect i.c. to gnd. 3 gnd ground 4 reset active-low open-drain or push-pull reset output. reset transitions from high to low when v cc drops below the selected reset threshold. reset remains low for the reset timeout period after v cc exceeds the device reset threshold. push-pull reset outputs are referenced to v cc . open- drain reset outputs require an external pullup resistor. 5v cc supply voltage. input for v cc reset monitor. for noisy systems, bypass v cc with a 0.1? capacitor to gnd.
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer _______________________________________________________________________________________ 7 max6861/max6862/max6863 pin description pin max6861/ max6863 max6862 name function 11ct reset timeout select input. connect ct low to select the d1 reset timeout output period (see tables 1 and 4). connect ct high (normally v cc ) to select the d3 reset timeout period. 22 gnd ground 33 mr active-low manual reset input. drive mr low to initiate a reset. the reset output remains asserted while mr is held low and for the reset timeout period after mr transitions high. leave mr unconnected or connect to v cc if unused. mr is internally pulled up to v cc through 10k ? . 4 reset active-low open-drain or push-pull reset output. reset transitions from high to low when v cc drops below the selected reset threshold or mr is pulled low. reset remains low for the reset timeout period after v cc exceeds the device reset threshold and mr deasserts. push-pull reset outputs are referenced to v cc . open-drain reset outputs require an external pullup resistor. 55v cc supply voltage. input for v cc reset monitor. for noisy systems, bypass v cc with a 0.1? capacitor to gnd. ? reset active-high push-pull reset output. reset transitions from low to high when v cc drops below the selected reset threshold or mr is pulled low. reset remains high for the reset timeout period after v cc exceeds the device reset threshold and mr deasserts. reset is referenced to v cc .
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer 8 _______________________________________________________________________________________ max6864/max6865/max6866 pin description pin max6864/ max6866 max6865 name function 1 reset active-low open-drain or push-pull reset output. reset transitions from high to low when v cc drops below the selected reset threshold, mr is pulled low, or the watchdog timer expires. reset remains low for the reset timeout period after v cc exceeds the device reset threshold, mr deasserts, or after the watchog timer expires. push-pull reset outputs are referenced to v cc . open-drain reset outputs require an external pullup resistor. 22 gnd ground 33 mr active-low manual reset input. drive mr low to initiate a reset. the reset output remains asserted while mr is held low and for the reset timeout period after mr transitions high. leave mr unconnected or connect to v cc if unused. mr is internally pulled up to v cc through 10k ? . 44 wdi watchdog input. if wdi remains high or low for longer than the watchdog timeout period, the internal watchdog timer expires, and a reset is triggered for the reset timeout period. the internal watchdog timer clears whenever reset is asserted, the manual reset is asserted, or wdi sees a rising or falling edge. 55v cc supply voltage. input for v cc reset monitor. for noisy systems, bypass v cc with a 0.1? capacitor to gnd. ? reset active-high push-pull reset output. reset transitions from low to high when v cc drops below the selected reset threshold, mr is pulled low, or the watchdog timer expires. reset remains high for the reset timeout period after v cc exceeds the device reset threshold, mr deasserts, or after the watchdog timer expires. reset is referenced to v cc .
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer _______________________________________________________________________________________ 9 max6867/max6868/max6869 pin description pin max6867/ max6869 max6868 name function 11 wdi watchdog input. if wdi remains high or low for longer than the watchdog timeout period, the internal watchdog timer expires, and a reset is triggered for the reset timeout period. the internal watchdog timer clears whenever reset is asserted, the manual reset is asserted, or wdi sees a rising or falling edge. 22 gnd ground 33 mr active-low manual reset input. drive mr low to initiate a reset. the reset output remains asserted while mr is held low and for the reset timeout period after mr transitions high. leave mr unconnected or connect to v cc if unused. mr is internally pulled up to v cc through 10k ? . 4 reset active-low open-drain or push-pull reset output. reset transitions from high to low when v cc drops below the selected reset threshold, mr is pulled low, or the watchdog timer expires. reset remains low for the reset timeout period after v cc exceeds the device reset threshold, mr deasserts, or after the watchdog timer expires. push-pull reset outputs are referenced to v cc . open-drain reset outputs require an external pullup resistor. 55v cc supply voltage. input for v cc reset monitor. for noisy systems, bypass v cc with a 0.1? capacitor to gnd. ? reset active-high push-pull reset output. reset transitions from low to high when v cc drops below the selected reset threshold, mr is pulled low, or the watchdog timer expires. reset remains high for the reset timeout period after v cc exceeds the device reset threshold, mr deasserts, or after the watchdog timer expires. reset is referenced to v cc .
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer 10 ______________________________________________________________________________________ max6854 max6855 max6856 max6858 max6860 max6869 v cc v cc wdi (max6864?ax6869) reset (max6854/max6856/max6858/ max6860/max6861 max6863/max6864/max6866/ max6867/max6869) mr (max6854/max6855/max6856/ max6861?ax6869) reset timeout generator reset (max6855/max6862/max6865/ max6868) ct (max6861/max6862/max6863) 1.25v 10k ? watchdog timer gnd watchdog transition detector figure 1. functional diagram v cc reset* *reset is the inverse of reset. mr v th t rp t mrd t rp t rd t mpw figure 2. reset timing relationship
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer ______________________________________________________________________________________ 11 detailed description reset /reset output a ?? reset input starts the ? in a known state. the max6854/max6855/max6856/max6858/max6860 max6869 ? supervisory circuits assert a reset to prevent code-execution errors during power-up, power-down, and brownout conditions. the max6854/max6855/max6856/ max6858/max6860?ax6869 reset output is guaranteed to be valid for v cc down to 1.1v. whenever v cc falls below the reset threshold, the reset output asserts low for reset and high for reset. once v cc exceeds the reset threshold, an internal timer keeps the reset output asserted for the specified reset timeout period, then after this interval the reset output deasserts (see figure 2). 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. the max6854/ max6855/max6856/max6861?ax6869 feature an mr input. a logic low on mr asserts a reset. reset remains asserted while mr is low and for the timeout period, t rp , after mr returns high. the devices provide an internal 10k ? pullup from mr to v cc . leave mr unconnected or connect to v cc if unused. mr can be driven with cmos logic levels or with open-drain/col- lector outputs. connect a normally open momentary switch from mr to gnd to implement a manual reset function; external debounce circuitry is not required. if mr is driven by long cables or the device is used in a noisy environment, connect a 0.1? capacitor from mr to gnd to provide additional noise immunity. watchdog input the max6864?ax6869? watchdog timer circuitry monitors the ?? activity. if the ? does not toggle (low-to-high or high-to-low) the watchdog input (wdi) within the watchdog timeout period (t wdi ), reset asserts for the reset timeout period (t rp ). the internal timer is cleared when reset asserts, when manual reset is asserted, or by a rising or falling edge on wdi. the watchdog input detects pulses as short as 150ns. while reset is asserted the watchdog timer does not count. as soon as reset deasserts, the watchdog timer resumes counting ( figure 3). applications information selecting the reset timeout period the reset timeout period for the max6854/max6855/ max6856/max6858/max6860/max6864?ax6869 is fixed (see table 4). the max6861/max6862/max6863 feature a reset timeout select input, ct. connect ct according to table 1 to select between the available 10ms and 150ms (min) reset timeout periods. the time- out period can be changed while a reset timeout period is in progress, but will not update until the reset timeout period has expired. v cc wdi t wd t wdi t rp reset* v cc ov ov *reset is the inverse of reset. figure 3. detailed watchdog input timing relationship table 1. max6861/max6862/max6863 reset timeout period selection ct connection min typ max units low 10 15 25 high 150 225 300 ms
max6854/max6855/max6856/max6858/max6860?ax6869 transient immunity in addition to issuing a reset to the ? during power-up, power-down, and brownout conditions, the max6854/ max6855/max6856/max6858/max6860?ax6869 are relatively immune to short-duration supply transients, or glitches. the maximum v cc transient duration vs. reset threshold overdrive graph in the typical operating characteristics shows this relationship. the area below the curve of the graph is the region in which these devices typically do not generate a reset pulse. this graph was generated using a falling pulse applied to v cc , starting 100mv above the actual reset threshold, v th , and ending below this threshold (reset- threshold overdrive). as the magnitude of the transient increases, the maximum allowable pulse width decreases. typically, a 100mv v cc transient duration of 40? or less does not cause a reset. interfacing to other voltages for logic compatibility the open-drain reset output can be used to interface to a ? with other logic levels. as shown in figure 4, the open-drain output can be connected to voltages from 0 to 5.5v. generally, the pullup resistor connected to reset con- nects to the supply voltage that is being monitored at the ic? v cc input. however, some systems use the open-drain output to level-shift from the monitored sup- ply to reset circuitry powered by another supply voltage. keep in mind that as the supervisor? v cc decreases, so does the ic? ability to sink current at reset . ensuring a valid reset down to v cc = 0v (push-pull reset ) when v cc falls below 1.1v, reset ? current-sinking capability declines drastically. the high-impedance cmos logic inputs connected to reset can drift to undetermined voltages. this presents no problems in most applications, since most ?s and other circuitry do not operate with v cc below 1.1v. in those applications where reset must be valid down to 0, add a pulldown resistor between reset and gnd for the max6854/max6858/max6861/max6864/ max6867 push-pull outputs. the resistor sinks any stray leakage currents, holding reset low ( figure 5). choose a pulldown resistor that accommodates leakages, such that reset is not significantly loaded and is capable of pulling to gnd. the external pulldown cannot be used with the open-drain reset outputs. watchdog software considerations one way to help the watchdog timer monitor software execution more closely is to set and reset the watchdog nanopower ? supervisory circuits with manual reset and watchdog timer 12 ______________________________________________________________________________________ max6856 max6860 max6863 max6866 max6869 gnd n reset reset 1.8v v cc v cc gnd 3.3v p 100k ? figure 4. interfacing with other voltage levels v cc v cc 2m ? max6854 max6858 max6861 max6864 max6867 gnd reset figure 5. ensuring reset valid to v cc = ground
input at different points in the program, rather than pulsing the watchdog input high-low-high or low-high- low. this technique avoids a stuck loop, in which the watchdog timer would continue to be reset inside the loop, keeping the watchdog from timing out. figure 6 shows an example of a flow diagram where the i/o driving the watchdog input is set high at the beginning of the program, set low at the beginning of every subroutine or loop, then set high again when the program returns to the beginning. if the program should hang in any subroutine, the problem would quickly be corrected, since the i/o is continually set low and the watchdog timer is allowed to time out, causing a reset or interrupt to be issued. max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer ______________________________________________________________________________________ 13 start set wdi high program code subroutine or program loop set wdi low return v cc threshold falling suffix min typ max units 46 4.509 4.625 4.741 45 4.388 4.500 4.613 44 4.266 4.375 4.484 43 4.193 4.300 4.408 42 4.095 4.200 4.305 41 3.998 4.100 4.203 40 3.900 4.000 4.100 39 3.802 3.900 3.998 38 3.705 3.800 3.895 37 3.608 3.700 3.793 36 3.510 3.600 3.690 35 3.413 3.500 3.588 34 3.315 3.400 3.485 33 3.218 3.300 3.383 32 3.120 3.200 3.280 31 2.998 3.075 3.152 30 2.925 3.000 3.075 29 2.852 2.925 2.998 28 2.730 2.800 2.870 27 2.633 2.700 2.768 26 2.559 2.625 2.691 25 2.438 2.500 2.563 24 2.340 2.400 2.460 23 2.255 2.313 2.371 225 2.180 2.235 2.290 22 2.133 2.188 2.243 21 2.048 2.100 2.153 20 1.950 2.000 2.050 19 1.853 1.900 1.948 18 1.755 1.800 1.845 17 1.623 1.665 1.707 16 1.536 1.575 1.614 v figure 6. watchdog flow diagram table 2. threshold suffix guide watchdog timeout period suffix min typ max units s 1.5 3.3 7.75 l95 209 487 s table 3. watchdog timeout
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer 14 ______________________________________________________________________________________ reset timeout periods timeout option min typ max units d1 10 15 25 d2 40 60 80 d3 150 225 300 d4 1200 1800 2400 d5 300 450 600 d6 600 900 1200 ms table 4. reset timeout periods part top mark max6854uk16d3 aefs max6854uk23d3 aefy max6854uk26d3 aefz max6854uk29d3 aega max6854uk31d3 aegb max6856uk16d3 aegr max6856uk23d3 aegs max6856uk26d3 aegt max6856uk29d3 aegu max6856uk31d3 aegv max6861uk17 aeko max6861uk225 aeks max6861uk26 aekp max6861uk29 aekq max6862uk17 aeos max6862uk225 aeot max6862uk26 aeou max6862uk29 aeov max6863uk17 aeow max6863uk225 aeox max6863uk26 aeoy max6863uk29 aeoz max6864uk16d3s aegc max6864uk23d3s aegd max6864uk26d3s aege max6864uk29d3s aegf max6864uk31d3s aegg max6866uk16d3s aegw max6866uk23d3s aegx max6866uk26d3s aegy max6866uk29d3s aeft max6866uk31d3s aegz table 5. standard versions ordering information (continued) part ? temp range pin-package max6856 uk_ _d_-t -40? to +85? 5 sot23-5 max6858 uk_ _d_-t* -40? to +85? 5 sot23-5 max6860 uk_ _d_-t -40? to +85? 5 sot23-5 max6861 uk_ _-t -40? to +85? 5 sot23-5 max6862 uk_ _-t -40? to +85? 5 sot23-5 max6863 uk_ _-t -40? to +85? 5 sot23-5 max6864 uk_ _d_ _-t -40? to +85? 5 sot23-5 max6865 uk_ _d_ _-t -40? to +85? 5 sot23-5 max6866 uk_ _d_ _-t -40? to +85? 5 sot23-5 max6867 uk_ _d_ _-t -40? to +85? 5 sot23-5 max6868 uk_ _d_ _-t -40? to +85? 5 sot23-5 max6869 uk_ _d_ _-t -40? to +85? 5 sot23-5 ? insert reset threshold suffix (see table 2, threshold suffix guide) after uk. insert the number corresponding to the desired reset timeout period (see table 4, reset timeout period) after d. insert the letter corresponding to the desired watchdog timeout period (s or l, see table 3) into the blank following the reset timeout period suffix for the max6864?ax6869. note: sample stock is generally held on standard versions only (see table 5, standard versions table). standard versions have an order increment of 2500 pieces. nonstandard versions have an order increment of 10,000 pieces. contact factory for availability of nonstandard versions. * future product?ontact factory for availability.
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer ______________________________________________________________________________________ 15 pin configurations top view i.c. reset gnd 15 v cc i.c. max6858 max6860 sot23 2 34 gnd gnd mr 15 v cc reset (reset) max6854 max6855 max6856 sot23 ( ) max6855 only 2 34 gnd wdi mr 15 v cc reset (reset) max6864 max6865 max6866 sot23 ( ) max6865 only 2 34 gnd reset (reset) mr 15 v cc wdi max6867 max6868 max6869 sot23 ( ) max6868 only 2 34 gnd reset (reset) mr 15 v cc ct max6861 max6862 max6863 sot23 ( ) max6862 only 2 34
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with manual reset and watchdog timer 16 ______________________________________________________________________________________ selector guide reset output part push-pull active low push-pull active high open-drain active low mr wdi ct max6854 max6855 max6856 ? max6858 max6860 max6861 max6862 max6863 ? max6864 ? max6865 ? max6866 ?? max6867 ? max6868 ? max6869 ?? chip information transistor count: 2848 process: bicmos
max6854/max6855/max6856/max6858/max6860?ax6869 nanopower ? supervisory circuits with 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. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ____________________ 17 2004 maxim integrated products printed usa is a registered trademark of maxim integrated products. 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 .) sot-23 5l .eps e 1 1 21-0057 package outline, sot-23, 5l

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