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max690a/max692a/max802l/max802m/MAX805L microprocessor supervisory circuits ________________________________________________________________ maxim integrated products 1 1 2 3 4 8 7 6 5 v batt reset (reset) wdi pfo pfi gnd v cc v out dip/so top view max690a max692a max802l max802m MAX805L ( ) are for MAX805L only. _________________pin configurations v cc nmi i/o line gnd bus v cc cmos ram gnd unregulated dc regulated +5v reset pfo wdi v out gnd v batt v cc pfi r 1 r 2 o.1 f 3.6v lithium battery max690a max802l p reset __________typical operating circuit 19-4333; rev 4; 12/05 __________________general description the max690a/max692a/max802l/max802m/MAX805L reduce the complexity and number of components required for power-supply monitoring and battery-control functions in microprocessor (?) systems. they signifi- cantly improve system reliability and accuracy compared to separate ics or discrete components. these parts provide four functions: 1) a reset output during power-up, power-down, and brownout conditions. 2) battery-backup switching for cmos ram, cmos ?, or other low-power logic. 3) a reset pulse if the optional watchdog timer has not been toggled within 1.6sec. 4) a 1.25v threshold detector for power-fail warning or low-battery detection, or to monitor a power supply other than +5v. the parts differ in their reset-voltage threshold levels and reset outputs. the max690a/max802l/MAX805L generate a reset pulse when the supply voltage drops below 4.65v, and the max692a/max802m generate a reset below 4.40v. the max802l/max802m guaran- tee power-fail accuracies to ?%. the MAX805L is the same as the max690a except that reset is provided instead of reset . all parts are available in 8-pin dip and so packages. the max690a/max802l are pin compatible with the max690 and max694. the max692a/max802m are pin compatible with the max692. _______________________applications battery-powered computers and controllers intelligent instruments automotive systems critical ? power monitoring ___________________________features ? precision supply-voltage monitor: 4.65v for max690a/max802l/MAX805L 4.40v for max692a/max802m ? reset time delay ?200ms ? watchdog timer ?1.6sec timeout ? battery-backup power switching ? 200a quiescent supply current ? 50na quiescent supply current in battery- backup mode ? voltage monitor for power-fail or low-battery warning ? power-fail accuracy guaranteed to 2% (max802l/m) ? guaranteed r r e e s s e e t t assertion to v cc = 1v ? 8-pin so and dip packages ______________ordering information part temp. range pin-package max690a cpa 8 plastic dip max690acsa 0? to +70? 8 so max690ac/d 0? to +70? dice* max690aepa -40? to +85? 8 plastic dip max690aesa -40? to +85? 8 so max690amja -55? to +125? 8 cerdip** ordering information continued on last page. * dice are specified at t a = +25? ** contact factory for availability and processing to mil-std-883. devices in pdip and so packages are available in both leaded and lead-free packaging. specify lead free by adding the + symbol at the end of the part number when ordering. lead free not available for cerdip package. 0? to +70? 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.
max690a/max692a/max802l/max802m/MAX805L microprocessor supervisory circuits 2 _______________________________________________________________________________________ terminal voltage (with respect to gnd) v cc ............................................... -0.3v to 6.0v v batt .............................................. -0.3v to 6.0v all other inputs (note 1) ................ -0.3v to (v cc + 0.3v) input current v cc ...................................................... 200ma v batt ..................................................... 50ma gnd ...................................................... 20ma output current v out ................... short-circuit protected for up to 10sec all other outputs ........................................ 20ma rate of rise, v cc , v batt ................................ 100v/? continuous power dissipation plastic dip (derate 9.09mw/? above +70?) ........ 727mw so (derate 5.88mw/? above +70?) ................ 471mw cerdip (derate 8.00mw/? above +70?) ........... 640mw operating temperature ranges: max69_ac_ _, max80_ _ c_ _ .................. 0c to +70c max69_ae_ _, max80_ _ e_ _ ................ -40c to +85c max69_amja, MAX805Lmja ................ -55c to +125? storage temperature range .................. -65c to +160? lead temperature (soldering, 10sec) .................. +300? electrical characteristics (v cc = 4.75v to 5.5v for max690a/max802l/MAX805L, v cc = 4.5v to 5.5v for max692a/max802m, v batt = 2.8v, t a = t min to t max , unless otherwise noted.) stresses beyond those listed under "absolute maximum ratings " may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. parameter symbol conditions min typ max units operating voltage range, v cc , v batt (note 2) max69_ac, max802_c 1.0 5.5 v MAX805Lc max69_ae/m, max80_ _e 1.2 5.5 supply current (excluding i out ) i supply max69_ac, max802_c 200 350 ? max69_ae/m, max802_e, MAX805Le/m 200 500 i supply in battery-backup mode (excluding i out ) v cc = 0v, v batt = 2.8v 0.05 1.0 5.0 5.5v > v cc > v batt +0.2v -0.1 0.02 ? -1.0 0.02 v out output i out = 5ma v cc - 0.05 v cc - 0.025 v absolute maximum ratings note 1: the input voltage limits on pfi and wdi may be exceeded if the current into these pins is limited to less than 10ma. v batt standby current (note 3) v cc - 0.5 v cc - 0.25 v out in battery-backup mode i out = 250?, v cc < v batt - 0.2v v batt - 0.1 v batt - 0.02 v i out = 50ma battery switch threshold, v cc to v batt v cc < v rt 20 mv -20 ? t a = +25? t a = +25? t a = t min to t max power-up power-down battery switchover hysteresis 40 mv reset threshold v rt max690a, max802l, MAX805L v max692a, max802m 4.25 4.40 4.50 max802l, t a = +25?, v cc falling 4.55 4.70 max802m, t a = +25?, v cc falling 4.30 4.45 reset threshold hysteresis 40 mv reset pulse width t rs 140 200 280 ms reset output voltage i source = 800? v cc - 1.5 v i sink = 3.2ma 0.4 0.3 0.3 t a = t min to t max max69_ac, max802_c, v cc = 1.0v i sink = 50? max69_ae/m, max802_e, v cc = 1.2v, i sink = 100? 1.1 5.5 4.50 4.65 4.75
v max690a/max692a/max802l/max802m/MAX805L microprocessor supervisory circuits _______________________________________________________________________________________ 3 parameter symbol conditions min typ max units reset output voltage MAX805Lc, i source = 4?, v cc = 1.1v 0.8 MAX805Le/m, i source = 4?, v cc = 1.2v 0.9 MAX805L, i source = 800? v cc - 1.5 MAX805L, i sink = 3.2ma 0.4 watchdog timeout t wd 1.00 1.60 2.25 sec pfo output voltage i source = 800? v cc - 1.5 v i sink = 3.2ma 0.4 note 2: either v cc or v batt can go to 0v, if the other is greater than 2.0v. note 3: "-" = battery-charging current, "+" = battery-discharging current. note 4: wdi is guaranteed to be in an intermediate, non-logic level state if wdi is floating and v cc is in the operating voltage range. wdi is internally biased to 35% of v cc with an input impedance of 50k ? . electrical characteristics (continued) (v cc = 4.75v to 5.5v for max690a/max802l/MAX805L, v cc = 4.5v to 5.5v for max692a/max802m, v batt = 2.8v, t a = t min to t max , unless otherwise noted.) wdi = 0v -150 -50 v wdi input current wdi = v cc 50 150 3.5 ? wdi input threshold (note 4) v cc = 5v 0.8 v wdi pulse width t wp v il = 0.4v, v ih = (0.8) (v cc ) 50 ns logic low logic high max69_a, MAX805L, v cc = 5v 1.20 1.25 1.30 pfi input threshold max802_c/e, v cc = 5v 1.225 1.250 1.275 pfi input current -25 0.01 25 na
max690a/max692a/max802l/max802m/MAX805L microprocessor supervisory circuits 4 _______________________________________________________________________________________ __________________________________________typical operating characteristics MAX805L reset output voltage vs. supply voltage 500ms/div 0v v cc +5v 1v/div reset 0v +5v 1v/div 10k 330 pf v cc reset gnd v batt MAX805L reset response time 2 s/div 0v v cc +4v 0v +4v +5v gnd reset v cc 330pf 10k 4.75 0 output voltage vs. load current 4.80 5.00 i out (ma) v out (v) 40 4.90 4.85 10 30 50 4.95 20 v cc = +5v v batt = +2.8v t a = +25? slope = 5 ? 2.70 0 output voltage vs. load current 2.72 2.80 i out (ma) v out (v) 0.8 2.76 2.74 0.2 0.6 1.0 2.78 0.4 v cc = 0v v batt = +2.8v t a = +25? slope = 80 ? max690a reset output voltage vs. supply voltage 500ms/div v cc 0v reset 0v +5v 1v/div +5v 1v/div v cc gnd reset v cc 2k reset 330pf t a = +25? v batt = ov max690a reset response time 2 s/div v cc +5v reset +5v +4v 1v/div 0v t a = +25? v cc gnd reset v cc 10k reset 30pf power-fail comparator response time 400ns/div pfi +1.30v pfo +5v +0v +1.2v +5v pfo 30pf 1k +1.25v pfi v cc = +5v t a = +25? power-fail comparator response time 400ns/div pfi +1.20v pfo 0v +3v +1.3v v cc = +5v t a = +25? +5v pfo 30pf 1k +1.25v pfi
max690a/max692a/max802l/max802m/MAX805L microprocessor supervisory circuits _______________________________________________________________________________________ 5 ______________________________________________________________pin description name function MAX805L 1 1 v out 2 2 v cc +5v supply input 3 3 gnd ground 4 4 pfi 5 5 pfo 6 6 wdi 7 reset 8 8 v batt power-fail comparator input. when pfi is less than 1.25v, pfo goes low. connect pfi to gnd or v cc when not used. power-fail output. when pfi is less than 1.25v, pfo goes low; otherwise pfo stays high. watchdog input. if wdi remains high or low for 1.6sec, the internal watchdog timer runs out and reset is triggered. if wdi is left floating or connected to a high-impedance three-state buffer, the watchdog feature is disabled. the internal watchdog timer clears whenever reset is asserted, wdi is three-stated, or wdi sees a rising or falling edge. pin max690a/max692a max802l/max802m reset output. whenever reset is triggered, it pulses low for 200ms. it stays low when v cc is below the reset threshold (4.65v in the max690a/max802l and 4.4v in the max692a/max802m) and remains low for 200ms after v cc rises above the reset threshold. a watchdog timeout also triggers reset . supply output for cmos ram. when v cc is above the reset threshold, v out connects to v cc through a p-channel mosfet switch. when v cc is below the reset threshold, the higher of v cc or v batt will be connected to v out . backup-battery input. when v cc falls below the reset threshold, v batt will be switched to v out if v batt is 20mv greater than v cc . when v cc rises to 20mv above v batt , v out will be reconnected to v cc . the 40mv hysteresis prevents repeated switching if v cc falls slowly. 7 reset active-high reset output is the inverse of reset . when reset is asserted, the reset output voltage = v cc or v batt , whichever is higher.
max690a/max692a/max802l/max802m/MAX805L _______________detailed description reset output a microprocessor? (??) reset input starts the ? in a known state. when the ? is in an unknown state, it should be held in reset. the max690a/max692a/max802l/ max802m assert reset during power-up and prevent code execution errors during power-down or brownout condi- tions. on power-up, once v cc reaches 1v, reset is guaran- teed to be a logic low. as v cc rises, reset remains low. when v cc exceeds the reset threshold, an internal timer keeps reset low for a time equal to the reset pulse width; after this interval, reset goes high (figure 2). if a brownout condition occurs (if v cc dips below the reset threshold), reset is triggered. each time reset is triggered, it stays low for the reset pulse width interval. any time v cc goes below the reset threshold, the internal timer restarts the pulse. if a brownout con- dition interrupts a previously initiated reset pulse, the reset pulse continues for another 200ms. on power- down, once v cc goes below the threshold, reset is guaranteed to be logic low until v cc droops below 1v. reset is also triggered by a watchdog timeout. if a high or low is continuously applied to the wdi pin for 1.6sec, reset pulses low. as long as reset is assert- ed, the watchdog timer remains clear. when reset comes high, the watchdog resumes timing and must be serviced within 1.6sec. if wdi is tied high or low, a reset pulse is triggered every 1.8sec (t wd plus t rs ). the MAX805L active-high reset output is the inverse of the max690a/max692a/max802l/max802m reset output, and is guaranteed to be valid with v cc down to 1.1v. some ?s, such as intel? 80c51, require an active-high reset pulse. watchdog input the watchdog circuit monitors the ?? activity. if the ? does not toggle the watchdog input (wdi) within 1.6sec, a reset pulse is triggered. the internal 1.6sec timer is cleared by either a reset pulse or by open cir- cuiting the wdi input. as long as reset is asserted or the wdi input is open circuited, the timer remains cleared and does not count. as soon as reset is released or wdi is driven high or low, the timer starts counting. it can detect pulses as short as 50ns. power-fail comparator the pfi input is compared to an internal 1.25v refer- ence. if pfi is less than 1.25v, pfo goes low. the power-fail comparator is intended for use as an under- voltage detector to signal a failing power supply; it need not be dedicated to this function though, as it is microprocessor supervisory circuits 6 _______________________________________________________________________________________ 1.25v 0.8v watchdog timer pfo reset (reset) v out reset generator battery-switchover circuitry 1.25v 3.5v v batt v cc pfi wdi max690a max692a max802l max802m MAX805L ( ) are for MAX805L only. gnd figure 1. block diagram t rs +5v 0v v cc 0v +5v 0v reset +5v 0v (reset) 3.0v 3.0v v out +5v 0v pfo v batt = pfi = 3.0v i out = 0ma ( ) are for MAX805L only. figure 2. timing diagram
max690a/max692a/max802l/max802m/MAX805L microprocessor supervisory circuits _______________________________________________________________________________________ 7 sw1/sw2 sw3/sw4 condition v cc > reset threshold open closed closed open open closed v cc < reset threshold and v cc > v batt v cc < reset threshold and v cc < v batt reset threshold = 4.65v in max690a/max802l/MAX805L. reset threshold = 4.4v in max692a/max802m v out d3 substrate d1 d2 sw2 sw1 sw4 sw3 v batt v cc max690a max692a max802l max802m MAX805L figure 3. backup-battery switchover block diagram v batt v cc v out reset (reset) gnd to static ram to p 0.1f max690a max802l MAX805L +5v + ( ) are for MAX805L only. figure 4. using a supercap as a backup power source with a max690a/max802l/MAX805L and a +5v ?% supply completely separate from the rest of the circuitry. the external voltage divider drives pfi to sense the unregu- lated dc input to the +5v regulator (see typical operating circuit ). the voltage-divider ratio can be chosen such that the voltage at pfi falls below 1.25v just before the +5v regulator drops out. pfo then trig- gers an interrupt which signals the ? to prepare for power-down. to conserve backup-battery power, the power-fail detector comparator is turned off and pfo is forced low when v batt connects to v out . backup-battery switchover in the event of a brownout or power failure, it may be necessary to preserve the contents of ram. with a backup battery installed at v batt , th e devices automati- cally switch ram to backup power when v cc fails. as long as v cc exceeds the reset threshold, v out connects to v cc through a 5 ? pmos power switch. once v cc falls below the reset threshold, v cc or v batt (whichever is high- er) switches to v out . unlike the max690/max692, the max690a/max692a/max802l/max802m/MAX805L don? always connect v batt to v out when v batt is greater than v cc . v batt connects to v out (through an 80 ? switch) only when v cc is below the reset threshold and v batt is greater than v cc . when v cc exceeds the reset threshold, it is connected to the max690a/max692a/max802l/max802m/MAX805L substrate, regardless of the voltage applied to v batt (figure 3). during this time, the diode (d1) between v batt and the substrate will conduct current from v batt to v cc if v batt is 0.6v or greater than v cc . table 1. input and output status in battery-backup mode signal status v cc disconnected from v out v out v batt pfi power-fail comparator is disabled. pfo logic low reset logic low reset logic high (MAX805L only) wdi watchdog timer is disabled connected to v batt through an internal 80 ? pmos switch connected to v out . current drawn from the battery is less than 1?, as long as v cc < v batt - 1v.
max690a/max692a/max802l/max802m/MAX805L when v batt connects to v out , backup mode is activat- ed and the internal circuitry is powered from the battery (table 1). when v cc is just below v batt , the current drawn from v batt is typically 30?. when v cc drops to more than 1v below v batt , the internal switchover com- parator shuts off and the supply current falls to less than 1?. __________applications information using a supercap as a backup power source supercaps are capacitors with extremely high capaci- tance values, on the order of 0.1f. figure 4 shows a supercap used as a backup power source. do not allow the supercap? voltage to exceed the maximum reset threshold by more than 0.6v. in figure 4? circuit, the supercap rapidly charges to within a diode drop of v cc . however, after a long time, the diode leakage current will pull the supercap voltage up to v cc . when using a supercap with the max690a/max802l/MAX805L, v cc may not exceed 4.75v + 0.6v = 5.35v. use the supercap circuit of figure 5 with a max692a or max802m and a ?0% supply. this circuit ensures that the supercap only charges to v cc - 0.5v. at the maximum v cc of 5.5v, the supercap charges up to 5.0v, only 0.5v above the maximum reset threshold?ell within the requisite 0.6v. microprocessor supervisory circuits 8 _______________________________________________________________________________________ v batt v cc v out reset gnd to static ram to p 0.1f max692a max802m +5v + 100k figure 5. using a supercap as a backup power source with the max692a/max802m and a +5v ?0% supply pfo v cc gnd to p max690 max692a max802l max802m MAX805L +5v r 2 r 1 r 3 pfi *optional +5v 0v pfo v l v h v trip v in 0v v in c1* figure 6. adding hysteresis to the power-fail comparator allowable backup power-source batteries lithium batteries work very well as backup batteries due to very low self-discharge rates and high energy density. single lithium batteries with open-circuit voltages of 3.0v to 3.6v are ideal. any battery with an open-circuit voltage less than the minimum reset threshold plus 0.3v can be connected directly to the v batt input of the max690a/max692a/max802l/max802m/MAX805L with table 2. allowable backup-battery voltages (see using a supercap as a backup power source section for use with a supercap) part no. maximum backup-battery voltage (v) max690a/ max802l/MAX805L 4.80 max692a/ max802m 4.55 v trip 1.25/ r 2 r 2 r 2 v ih 1.25/ r 2 || r 3 r 1 r 2 || r 3 v l 1.25 r 1 5 1.25 r 3 1.25 r 2 = + = + ? + ? = ? ? ? ? ? ? ? ? ? ? supercap is a trademark of baknor industries.
max690a/max692a/max802l/max802m/MAX805L microprocessor supervisory circuits _______________________________________________________________________________________ 9 no additional circuitry (see the typical operating circuit ). however, batteries with open-circuit voltages that are greater cannot be used for backup, as current is sourced into the substrate through the diode (d1 in figure 3) when v cc is close to the reset threshold. operation without a backup power source if a backup power source is not used, ground v batt and connect v out to v cc . since there is no need to switch over to any backup power source, v out does not need to be switched. a direct connection to v cc eliminates any voltage drops across the switch which may push v out below v cc . replacing the backup battery the backup battery can be removed while v cc remains valid, without danger of triggering reset/ reset . as long as v cc stays above the reset threshold, battery- backup mode cannot be entered. in other switchover ics where battery-backup mode is entered whenever v batt gets close to v cc , an unconnected v batt pin pfo v cc gnd max690a max692a max802l max802m MAX805L +5v r 2 r 1 pfi +5v 0v pfo v trip v- 0v v- note: v trip is negative figure 7. monitoring a negative voltage 5 1.25 r 1 1.25 - v trip r 2 ? = accumulates leakage charge and triggers reset/ reset in error. adding hysteresis to the power-fail comparator hysteresis adds a noise margin to the power-fail com- parator and prevents repeated triggering of pfo when v in is close to its trip point. figure 6 shows how to add hysteresis to the power-fail comparator. select the ratio of r 1 and r 2 such that pfi sees 1.25v when v in falls to its trip point (v trip ). r 3 adds the hysteresis. it will typically be an order of magnitude greater than r 1 or r 2 (about 10 times either r 1 or r 2 ). the current through r 1 and r 2 should be at least 1? to ensure that the 25na (max) pfi input current does not shift the trip point. r 3 should be larger than 10k ? so it does not load down the pfo pin. capacitor c1 adds additional noise rejection. monitoring a negative voltage the power-fail comparator can be used to monitor a negative supply rail using the circuit of figure 7. when the negative rail is good (a negative voltage of large magnitude), pfo is low. when the negative rail is degraded (a negative voltage of lesser magnitude), pfo goes high. this circuit? accuracy is affected by the pfi threshold tolerance, the v cc line, and the resis- tors. interfacing to ?s with bidirectional reset pins ?s with bidirectional reset pins, such as the motorola 68hc11 series, can contend with the max690a/max692a/max802l/max802m reset out- put. if, for example, the reset output is driven high and the ? wants to pull it low, indeterminate logic lev- els may result. to correct this, connect a 4.7k ? resis- tor between the reset output and the ? reset i/o, as in figure 8. buffer the reset output to other system components
max690a/max692a/max802l/max802m/MAX805L microprocessor supervisory circuits 10 ______________________________________________________________________________________ max690a max692a max802l max802m buffered reset to other system components 4.7k v cc gnd v cc gnd reset reset figure 8. interfacing to ?s with bidirectional reset i/o
max690a/max692a/max802l/max802m/MAX805L microprocessor supervisory circuits ______________________________________________________________________________________ 11 minimum nominal nominal reset watchdog power- reset pulse timeout backup- c c c c e e e e - fail manual- watch- low- active- battery- part threshold width period battery write com- reset dog line high on number (v) (ms) (sec) switch protect parator input output output reset output max690a/692a 4.65/4.40 140 1.6 ?? max691a/693a 4.65/4.40 140/adj. 1.6/adj. ?? /10ns ????? max696 adj. 35/adj. 1.6/adj. ???? ?? max697 adj. 35/adj. 1.6/adj. ?? ?? ? max700 4.65/adj. 200 - ?? max703/704 4.65/4.40 140 - ??? max705/706 4.65/4.40 140 1.6 ??? max706p 2.63 140 1.6 ??? ? max706r/s/t 2.63/2.93/ 140 1.6 ??? 3.08 max707/708 4.65/4.40 140 - ?? ? max708r/s/t 2.63/2.93/ 140 - ?? ? 3.08 max709l/m/ 4.65/4.40/ 140 - r/s/t 2.63/2.93/3.08 max791 4.65 140 1 ?? /10ns ? ??? ?? max792l/m/ 4.65/4.40/ 140 1 ? /10ns ? ??? ? r/s/t 2.63/2.93/3.08 max800l/m 4.60/4.40 140 1.6/adj. ?? /10ns ? / 2% ?? ?? max802l/m 4.60/4.40 140 1.6 ?? / 2% MAX805L 4.65 140 1.6 ?? ? max813l 4.65 140 1.6 ??? ? max820l/m/ 4.65/4.40/ 140 1 ? /10ns ? / 2% ??? ? r/s/t 2.63/2.93/3.08 max1232 4.37/4.62 250 0.15/0.60/1.2 ?? max1259 - - - ?? ________________________ p supervisory circuits
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. max690a/max692a/max802l/max802m/MAX805L microprocessor supervisory circuits part temp. range pin-package max692a cpa 0? to +70? 8 plastic dip max692acsa 0? to +70? 8 so max692ac/d 0? to +70? dice* max692aepa -40? to +85? 8 plastic dip max692aesa -40? to +85? 8 so max692amja -55? to +125? 8 cerdip** __ordering information (continued) max802l cpa 0? to +70? 8 plastic dip max802lcsa 0? to +70? 8 so max802lepa -40? to +85? 8 plastic dip max802lesa -40? to +85? 8 so MAX805Lesa -40? to +85? 8 so MAX805Lepa -40? to +85? 8 plastic dip MAX805Lc/d 0? to +70? dice* MAX805Lcsa 0? to +70? 8 so MAX805L cpa 0? to +70? 8 plastic dip max802mesa -40? to +85? 8 so max802mepa -40? to +85? 8 plastic dip max802mcsa 0? to +70? 8 so max802m cpa 0? to +70? 8 plastic dip * dice are specified at t a = +25?. ** contact factory for availability and processing to mil-std-883. devices in pdip and so packages are available in both leaded and lead-free packaging. specify lead free by adding the + symbol at the end of the part number when ordering. lead free not available for cerdip package. ____________________chip topography ( ) are for MAX805L only. transistor count: 573; substrate must be left unconnected. MAX805Lmja -55? to +125? 8 cerdip** reset (reset) gnd v batt pfi 0.061" (1.55mm) 0.078" (1.98mm) wdi pfo v cc v out

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