general description the max6381?ax6390 microprocessor (?) supervisory circuits monitor power-supply voltages from +1.8v to +5.0v while consuming only 3? of supply current at +1.8v. whenever v cc falls below the factory-set reset thresholds, the reset output asserts and remains assert- ed for a minimum reset timeout period after v cc rises above the reset threshold. reset thresholds are available from +1.58v to +4.63v, in approximately 100mv incre- ments. seven minimum reset timeout delays ranging from 1ms to 1200ms are available. the max6381/MAX6384/max6387 have a push-pull active-low reset output. the max6382/max6385/ max6388 have a push-pull active-high reset output, and the max6383/max6386/max6389/max6390 have an open-drain active-low reset output. the MAX6384/max6385/max6386 also feature a debounced manual reset input (with internal pullup resistor). the max6387/max6388/max6389 have an auxiliary input for monitoring a second voltage. the max6390 offers a manual reset input with a longer v cc reset timeout period (1120ms or 1200ms) and a shorter manual reset timeout (140ms or 150ms). the max6381/max6382/max6383 are available in 3-pin sc70 and 6-pin dfn packages and the MAX6384?ax6390 are available in 4-pin sc70 and 6-pin ?fn packages. features ? factory-set reset threshold voltages ranging from +1.58v to +4.63v in approximately 100mv increments ? ?.5% reset threshold accuracy over temperature (-40? to +125?) ? seven reset timeout periods available: 1ms, 20ms, 140ms, 280ms, 560ms, 1120ms, 1200ms (min) ? 3 reset output options active-low push-pull active-high push-pull active-low open-drain ? reset output state guaranteed valid down to v cc = 1v ? manual reset input (MAX6384/max6385/max6386) ? auxiliary reset in (max6387/max6388/max6389) ? v cc reset timeout (1120ms or 1200ms)/manual reset timeout (140ms or 150ms) (max6390) ? negative-going v cc transient immunity ? low power consumption of 6? at +3.6v and 3? at +1.8v ? pin compatible with max809/max810/max803/max6326/max6327/ max6328/max6346/max6347/max6348, and max6711/max6712/max6713 ? tiny 3-pin/4-pin sc70 and 6-pin ?fn packages max6381?ax6390 sc70/?fn, single/dual low-voltage, low-power ? reset circuits ________________________________________________________________ maxim integrated products 1 reset (reset) 1 3 v cc gnd max6381 max6382 max6383 top view 2 sc70 ( ) is for max6382 123 654 gnd v cc n.c. n.c n.c. max6381 max6382 max6383 dfn reset (reset) part temp range pin- package pkg code max6381 lt_ _d_+t -40 c to +125 c 6 ?fn-6 l611-1 max6381xr_ _d_+t -40 c to +125 c 3 sc70-3 x3-2 max6382 lt_ _d_+t -40 c to +125 c 6 ?fn-6 l611-1 max6382xr_ _d_+t -40 c to +125 c 3 sc70-3 x3-2 pin configurations 19-1839; rev 4; 4/07 ordering information pin configurations continued at end of data sheet. ordering information continued at end of d ata sheet. typical operating circuit appears at end of data sheet. selector guide appears at end of data sheet. note: insert reset threshold suffix (see reset threshold table) after "xr", "xs", or "lt." insert reset timeout delay (see reset timeout delay table) after "d" to complete the part number. sample stock is generally held on standard versions only (see standard versions table). standard versions have an order increment requirement of 2500 pieces. nonstandard versions have an order increment requirement of 10,000 pieces. contact factory for availability of nonstandard versions. + denotes a lead-free package. for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. computers controllers intelligent instruments critical ? and ? power monitoring portable/battery- powered equipment dual voltage systems applications
max6381?ax6390 sc70/?fn, single/dual low-voltage, low-power ? reset circuits 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = full range, t a = -40? to +125?, unless otherwise specified. 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. v cc to gnd ..........................................................-0.3v to +6.0v reset open-drain output....................................-0.3v to +6.0v reset , reset (push-pull output) ..............-0.3v to (v cc + 0.3v) mr , reset in.............................................-0.3v to (v cc + 0.3v) input current (v cc ) .............................................................20ma output current (all pins) .....................................................20ma continuous power dissipation (t a = +70?) 3-pin sc70 (derate 2.9mw/? above +70?) ..............235mw 4-pin sc70 (derate 3.1mw/? above +70?) ..............245mw 6-pin ?fn (derate 2.1mw/? above +70?) ..........167.7mw operating temperature range .........................-40? to +125? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? parameter symbol conditions min typ max units operating voltage range v cc 1.0 5.5 v v cc = 5.5v, no load 7 13 v cc = 3.6v, no load 6 11 v cc = 2.5v, no load 4 7 v cc supply current i cc v cc = 1.8v, no load 3 6 ? t a = +25 c v th - 1.5% v th v th + 1.5% v cc reset threshold (see reset thresholds table) v th t a = -40 c to +125 c v th - 2.5% v th v th + 2.5% v reset threshold tempco ? v th / c 60 ppm / c v cc to reset delay v cc falling at 10mv/? from v th + 100mv to v th - 100mv 35 ? d1 1 2 d2 20 40 d3 140 280 d5 280 560 d6 560 1120 d4 1120 2240 reset timeout period max6381?ax6389 (see reset timeout table) t rp d7 1200 2400 ms d4 140 280 mr timeout period d7 150 300 d4 1120 2240 reset timeout period max6390 t rp v cc timeout period d7 1200 2400 ms v il 0.3 x v cc v ih v th < 4v 0.7 x v cc v il 0.8 mr input voltage v ih v th > 4v 2.4 v
max6381?ax6390 sc70/?fn, single/dual low-voltage, low-power ? reset circuits _______________________________________________________________________________________ 3 electrical characteristics (continued) (v cc = full range, t a = -40? to +125?, unless otherwise specified. typical values are at t a = +25?.) (note 1) note 1: specifications over temperature are guaranteed by design, not production tested. parameter symbol conditions min typ max units mr minimum input pulse width 1 s mr glitch rejection 100 ns mr to reset delay 200 ns max6381?ax6389 32 63 100 k ? mr internal pullup resistance max6390 500 1560 3000 ? t a = +25 c 1.245 1.27 1.295 t a = 0 c to +85 c 1.232 1.308 reset in input threshold v thrst t a = -40 c to +125 c 1.219 1.321 v reset in to reset delay v resetin falling at 4mv/? from v thrst + 40mv to v thrst - 40mv 4.5 ? reset in input leakage current i reset in -50 1 +50 na v cc 4.5v, i sink = 3.2ma, reset asserted 0.4 v cc 2.5v, i sink = 1.2ma, reset asserted 0.3 open-drain reset output voltage v ol v cc 1.0v, i sink = 80?, reset asserted 0.3 v open-drain reset output leakage current i lkg v cc > v th , reset not asserted 1.0 ? v cc 4.5v, i sink = 3.2ma, reset asserted 0.4 v cc 2.5v, i sink = 1.2ma, reset asserted 0.3 v ol v cc 1.0v, i sink = 80?, reset asserted 0.3 v cc 4.5v, i source = 800?, reset not asserted 0.8 x v cc push-pull reset output voltage v oh v cc 2.5v, i source = 500?, reset not asserted 0.8 x v cc v v cc 4.5v, i source = 800?, reset asserted 0.8 x v cc v cc 2.5v, i source = 500?, reset asserted 0.8 x v cc v cc 1.8v, i source = 150?, reset asserted 0.8 x v cc v oh v cc 1.0v, i source = 1?, reset asserted 0.8 x v cc v cc 4.5v, i sink = 3.2ma, reset not asserted 0.4 push-pull reset output voltage v ol v cc 2.5v, i sink = 1.2ma, reset not asserted 0.3 v
max6381?ax6390 sc70/?fn, single/dual low-voltage, low-power ? reset circuits 4 ______________________________________________________________________________________ typical operating characteristics (t a = +25?, unless otherwise noted.) 0 2 1 5 4 3 6 7 8 9 -40 -10 5 -25 203550658095110125 supply current vs. temperature (no load) max6381/90 toc01 temperature ( c) supply current ( a) v cc = +1.8v v cc = +2.5v v cc = +3.6v v cc = +5.5v 25 29 27 35 33 31 37 39 41 43 -40 -10 5 -25 203550658095110125 power-down reset delay vs. temperature max6381/90 toc02 temperature ( c) power-down reset delay ( s) v cc = +1.8v v cc = +3v 0.94 0.98 0.96 1.02 1.00 1.06 1.04 1.08 -40 -10 5 20 -25 35 50 65 80 95 110 125 normalized power-up reset timeout vs. temperature max6381/90 toc03 temperature ( c) normalized reset timeout period 0.990 0.985 1.015 0.995 0.990 1.000 1.005 1.010 1.020 -40 -10 5 20 -25 35 50 95 80 110 65 125 max6381/90 toc04 temperature ( c) normalized reset threshold normalized reset threshold vs. temperature 0 0.4 0.2 0.8 0.6 1.0 1.2 06 3912 output-voltage low vs. sink current max6381/90 toc05 i sink (ma) v ol (v) v cc = +3.0v v cc = +4.5v 0 1.0 0.5 2.0 1.5 2.5 3.0 0 500 750 250 1000 1250 1500 output-voltage high vs. source current max6381/90 toc06 i source ( a) v oh (v) v cc = +2.5v v cc = +1.8v 450 0 1 1000 100 10 maximum transient duration vs. reset comparator overdrive 150 50 350 250 500 200 100 400 300 max6381/90 toc07 reset comparator overdrive, v th - v cc (mv) maximum transient duration ( s) reset asserted above this line 3.5 3.9 3.7 4.5 4.3 4.1 4.7 4.9 5.3 5.1 5.5 -40 -10 5 -25 20 35 50 65 80 95 110 125 reset in to reset delay vs. temperature max6381/90 toc08 temperature ( c) reset in delay ( s)
max6381?ax6390 sc70/?fn, single/dual low-voltage, low-power ? reset circuits _______________________________________________________________________________________ 5 pin description pin 3-pin sc70 4-pin sc70 ?fn max6381/ max6383 max6382 MAX6384/ max6386/ max6390 max6385 max6387/ max689 max6388 name function 1 (max6382/ max6385/ max6388) 2 2 2 reset active-high push-pull reset output. reset changes from low to high when any monitored voltage (v cc or v resetin ) drops below the reset threshold or mr is pulled low. reset remains high for the reset timeout period after monitored voltages exceed the reset thresholds or mr is released. 1 (max6381/ max6383/ MAX6384/ max6386/ max6387/ max6390) 2 2 2 reset acti ve- low op en- d r ai n/p ush- p ul l reset outp ut. re s e t chang es fr om hi g h to l ow w hen any m oni tor ed vol tag e ( v c c or v re s e tin ) d r op s b el ow the r eset thr eshol d or m r i s p ul l ed l ow . re s e t r em ai ns l ow for the r eset ti m eout p er i od after the m oni tor ed vol tag es exceed the r eset thr eshol d s or m r i s r el eased . o p en- d r ai n r eq ui r es an exter nal p ul l up r esi stor . 2, 3, 5 (max6381/ max6382/ max6383) 2, 5 (MAX6384 |