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general description the max16122Cmax16125 pushbutton controllers with single-supply monitors monitor one or two pushbuttons and generate a hard reset signal if the buttons are pushed and held for a setup delay. these devices make it easy to hide the hard reset function in an existing pushbutton, such as a soft power switch. the devices operate from 1.6v to 5.5v and consume a quiescent current of only 5a at 3v. the max16122Cmax16125 have pin-programmable or resistor-adjustable setup delay. connect the sel pin to gnd, v cc , or leave it unconnected to select the different setup delays (depending on part suffix, see table 1a ) or connect an external resistor from sel to gnd to set the setup delays (e suffix only, see table 1b ). the max16124/max16125 have one manual reset input ( mr ), a reset output ( reset ), and a soft reset output ( sreset ) which mirrors the state of the input . the max16122/max16123 have two identical manual reset inputs ( mr1 and mr2 ) and one reset output ( reset ). a deglitch block is connected to each input to add a delay to the falling edge with a fixed deglitch period of 20ms (t db ). the devices feature a comparator that monitors the input supply voltage. a variety of factory-trimmed threshold options accommodate different supply voltages and tolerances, eliminating external components. the factory- set reset thresholds range from 1.58v to 4.63v to monitor 5v, 3.3v, 2.5v, and 1.8v supplies. the max16122Cmax16125 are offered in a tiny 0.86mm x 1.27mm, 6-bump wlp package and are specified over the automotive temperature range (-40c to +125c). beneits and features low supply current: < 5a (typ) at 3v over temperature precision factory-set v cc monitoring threshold for 1.8v, 2.5v, 3.3v, and 5v supplies fixed/pin-programmable or resistor-adjustable pushbutton setup delay up to 2 reset outputs and 2 debounced pushbutton inputs guaranteed reset valid for v cc down to 0.95v active-low reset output (push-pull or open-drain) immune to short power-supply transients 0.86mm x 1.27mm 6-bump wlp package -40c to +125c operating temperature range applications smartphones tablet pcs ebook readers portable/battery-powered equipment glucose monitors/patient monitors portable instrumentation ordering information appears at end of data sheet. typical operating circuits (continued) appears at end of data sheet. 19-6398; rev 2; 4/16 v cc sreset reset resetinput i/0 mr gnd gnd v cc max16124max16125 p 0.1f 1.6v to 5.5v max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package typical operating circuits downloaded from: http:///
(all pins referenced to gnd)v cc .......................................................................... -0.3v to +6v reset , sreset to gnd open-drain .............................................................. -0.3v to +6v push-pull .................................................. -0.3v to (v cc + 0.3v) mr , mr1 , mr2 ........................................................ -0.3v to +6v sel .......................................................................... -0.3v to +6v input/output current (all pins) ............................................ 20ma continuous power dissipation (t a = +70c) (multilayer board) wlp (derate 10.5mw/c above +70c) ...................... 840mw operating temperature range ......................... -40c to +125c junction temperature ...................................................... +150c storage temperature range ............................ -65c to +150c soldering temperature (reflow) ....................................... +260c wlp junction-to-ambient thermal resistance ( ja ) .......... 95c/w (note 1) (v cc = 1.6v to 5.5v, t a = -40 c to +125 c, unless otherwise noted. typical values are at t a = +25 c.) (note 2) parameter symbol conditions min typ max units operating voltage range v cc reset state guaranteed for v cc 0.95v 1.6 5.5 v v cc undervoltage lockout v ccuvlo 1.25 1.55 v v cc supply current i cc v cc = 5v, steady-state condition; mr , mr1 , mr2 , reset , and sreset not asserted 8 10 a supply current with oscillator running i cc2 v cc = 3v 5 10 a v cc reset threshold v th v cc falling -2.5% v th +2.5% v v cc reset threshold hysteresis v hyst 2 % reset threshold tempco 30 ppm/ c v cc to reset output delay t d v cc falling at 10mv/s from (v th + 100mv) to (v th - 100mv) 10 s reset timeout period t rp see table 2 -10 t rp +10 % manual reset setup delay t su internal timing (see tables 1a, 1b, 1c) -10 t su +10 % debounce period t db 18 20 22 ms max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package www.maximintegrated.com maxim integrated 2 note 1: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four-layer board. for detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial . absolute maximum ratings 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 specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. package thermal characteristicselectrical characteristics downloaded from: http:///
(v cc = 1.6v to 5.5v, t a = -40 c to +125 c, unless otherwise noted. typical values are at t a = +25 c.) (note 2) note 2: all parameters are production tested at t a = +25c. limits over the operating temperature range are guaranteed by design. parameter symbol conditions min typ max units outputs ( reset , sreset ) reset , sreset output low v ol v cc = v th(min) , v th > 4.25v, i sink = 10ma 0.4 v v cc = v th(min) , v th > 2.5v, i sink = 3.2ma 0.4 v v cc = v th(min), v th > 1.67v, i sink = 1ma 0.4 v v cc = v th(min) , v th > 1v, i sink = 100a 0.4 v v cc > 0.95v, v cc falling, i sink = 15a 0.4 v reset , sreset output high (push-pull outputs) v oh v cc > 0.95v, i source = 15a 0.8 x v cc v v cc > 1.2v, i source = 100a 0.8 x v cc v v cc > 1.67v, i source = 150a 0.8 x v cc v v cc > 2.7v, i source = 500a 0.8 x v cc v v cc > 4.5v, i source = 800a 0.8 x v cc v reset , sreset output leakage current (open-drain outputs) 1 a manual reset inputs ( mr , mr1 , mr2 ) mr1 , mr2 , mr input voltage low v il 0.3 x v cc v mr1 , mr2 , mr input voltage high v ih 0.7 x v cc v manual reset minimum pulse width 1 s manual reset glitch rejection 100 ns manual reset to soft reset delay t mrd 200 ns mr1 , mr2 , mr internal pullup resistance 25 50 80 k? select (sel) logic input sel input low voltage 0.15 x v cc v sel input high voltage 0.85 x v cc v sel input leakage -8 +8 a max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package www.maximintegrated.com maxim integrated 3 electrical characteristics (continued) downloaded from: http:///
(v cc = 5v, max16125wtdb29+, t a = +25c, unless otherwise noted.) supply current vs. supply voltage max16122 toc01 supply voltage (v) supply current (a) 5.5 5.0 4.0 4.5 2.5 3.0 3.5 2.0 2 3 4 5 6 7 8 9 10 1 1.5 6.0 t a = -40c t a = +125c t a = +25c t a = +85c maximum v cc transient duration vs. reset threshold overdrive max16122 toc04 reset threshold overdrive (v) maximum v cc transient duration (s) 0.20 0.15 0.10 0.05 2 4 6 8 10 12 14 0 0 0.25 max16125wtdb29+ v cc reset threshold vs. temperature max16122 toc05 temperature (c) v cc reset threshold (%) 110 95 80 65 50 35 20 5 -10 -25 5 -5 -40 125 -4 -3 -2 -1 1 2 3 40 normalized to t a = +25 c max16125wtdb29+ supply current vs. temperature max16122 toc02 temperature (c) supply current (a) 110 95 80 65 50 35 20 5 -10 -25 2 4 6 8 10 0 -40 125 v cc = 3.3v reset timeout period vs. temperature max16122 toc03 temperature (c) reset timeout period (ms) 110 95 80 65 50 35 20 5 -10 -25 1.95 2.00 2.05 2.101.90 -40 125 v cc = 3.0v max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package maxim integrated 4 www.maximintegrated.com typical operating characteristics downloaded from: http:///
(v cc = 5v, max16125wtdb29+, t a = +25c, unless otherwise noted.) v cc to reset output delay vs. temperature max16122 toc06 temperature (c) v cc to reset output delay (s) 110 95 80 65 50 35 20 5 -10 -25 2 4 6 8 10 0 -40 125 v cc to reset delay max16122 toc09 4s/div v th + 100mv 100mv/divreset 2v/div t su vs. r sel max16122 toc10 sel resistance to gnd (k ? ) setup delay (s) 460 410 310 360 110 160 210 260 60 2 4 6 8 10 12 14 16 18 20 22 24 0 10 reset output-low voltage vs. sink current max16122 toc07 sink current (ma) reset v ol (v) 4.5 4.0 0.5 1.0 1.5 2.5 3.0 2.0 3.5 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0 0 5.0 v cc = 2.9v v cc = 2.5v v cc = 1.5v pushbutton timing max16122 toc08 t su = 13.03s 2s /div mr12v/div max16125wtdb29+ sreset2v/div reset2v/div max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package maxim integrated 5 www.maximintegrated.com typical operating characteristics (continued) downloaded from: http:///
bump name function max16122/max16123 max16124/ max16125 a1 a1 reset active-low reset output. reset is either an open-drain or a push-pull output (see the selector guide ). reset asserts low when v cc drops below the selected threshold and remains low for the v cc reset timeout period after v cc rises above the reset threshold. the reset one-shot asserts low for the reset timeout period when the manual reset input is asserted longer than the setup delay. the open-drain output requires an external pullup resistor. a2 sreset soft reset output. sreset is the debounced version of mr. b1 b1 sel setup delay select input. connect sel to v cc , gnd, or leave unconnected to select a desired setup delay (see table 1a); or connect an external resistor between sel and gnd to select a desired setup delay (e sufix only, see tables 1a and 1b). b2 mr manual reset input. internal 50k pullup to v cc . pull mr low for the setup delay (t su ) to one-shot pulse reset for the reset timeout period. top view bump side down 2 ab c 1 sel v cc gnd + max16124/max16125 wlp sreset mr reset ab 1 2 sel v cc gnd c + max16122/max16123 wlp mr2 reset mr1 max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package www.maximintegrated.com maxim integrated 6 bump description bump conigurations downloaded from: http:///
detailed description the max16122Cmax16125 low-current microprocessor reset circuits feature single or dual manual reset inputs with an extended setup period. the devices also feature an internal comparator to monitor 5v, 3.3v, 2.5v, and 1.8v supplies. when the monitored supply voltage drops below the specified threshold, the active-low reset output asserts low and remains low for the reset timeout period (trp). the reset output is one-shot pulse asserted for the reset timeout period. for applications that do not require reset timeout period at startup, devices with that con - figuration are offered. supply voltage reset threshold is selectable through part suffix, see table 3 . connect sel to gnd, v cc , or leave unconnected to select the different setup delays (depending on part suffix, see table 1a ), or connect to an external resistor to set the setup delays (e suffix only, see table 1b ). the max16124/max16125 have one manual reset input ( mr ), one reset output ( reset ), and one soft reset output ( sreset ). the max16122/max16123 have two identical manual reset inputs ( mr1 and mr2 ) and one reset output ( reset ). a deglitch block is connected to each manual reset input to add a delay to the falling edge with a fixed deglitch period of 20ms (t db ). resistor-adjusted setup delay for the max16122Cmax16125 with the e setup delay suffix (max1612_wte_+t), a resistor connected from sel to gnd sets the setup delay. table 1b shows com - mon resistor values and the resulting setup delays. for resistor values not in the table, use the following formula to compute the setup delay: su r t 20 = where r is the resistor value in k and t su is the result - ing setup delay in seconds. for best results, use resistor values between 10k and 500k. reset output the reset output is typically connected to the reset input of a microprocessor (p). a ps reset input starts or restarts the fp in a known state. the max16122C max16125 fp supervisory circuits provide the reset logic to prevent code-execution errors during power-up, power-down, and brownout conditions (see the typical operating characteristics ). the max16122/max16123 have a reset output reset . the max16124/max16125 have a reset output reset and a soft-reset output sreset which is the debounced mirror image of mr (see figure 1a ). bump name function max16122/ max16123 max16124/ max16125 c1 c1 v cc power-supply input. v cc provides power to the device and is also a monitored voltage. when v cc drops below the selected threshold, reset asserts low and remains low for the reset timeout period after v cc rises above the threshold. bypass v cc to gnd with a 0.1f capacitor. c2 c2 gnd ground b2 mr1 active-low manual reset input 1. internal 50k pullup to v cc . pull both mr1 and mr2 low for the setup delay (t su ) to one-shot pulse reset for the reset timeout period. a2 mr2 active-low manual reset input 2. internal 50k pullup to v cc . pull the mr2 and mr1 low for the setup delay (t su ) to one-shot pulse reset for the reset timeout period. max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package www.maximintegrated.com maxim integrated 7 pin description (continued) downloaded from: http:///
all reset outputs are either active-low open-drain or active-low push-pull (see the selector guide ). reset changes from high to low whenever the monitored voltage v cc drops below the reset threshold voltage. once v cc exceeds its respective reset threshold voltage, reset remains low for the reset timeout period (t rp ) and then goes high. reset is one-shot pulsed whenever selected manual reset inputs are asserted longer than the setup delay (t su ). reset stays asserted for the normal reset timeout period. reset is guaranteed to be in the proper output logic state for v cc 0.95v. for applications requir - ing valid reset logic when v cc is less than 0.95v, see the ensuring a valid reset output down to v cc = 0v (push-pull reset output) section. manual reset input each device in the max16122Cmax16125 family includes at least one manual reset input, which must be held logic- low for an extended setup period (t su ) before the reset output asserts. an internal pullup resistor is connected to each manual reset input. when valid manual reset input conditions/setup periods are met, the reset output is pulsed low for the reset timeout period (see table 2 ). existing front-panel pushbutton switches (i.e., power- on/-off, channel up/down, or mode select) can be used to drive the manual reset inputs. the extended manual reset setup period prevents nuisance system resets dur - ing normal front-panel usage or resulting from inadvertent short-term pushbutton closure. the max16124/max16125 include a single manual reset input ( mr ) and two reset outputs ( reset and sreset ). the max16122/max16123 include two manual reset inputs ( mr1 and mr2 ) and one reset output, reset . for dual mr1 and mr2 devices, both inputs must be simulta - neously pulled low and held for the extended setup period (t su ) before the reset output is pulsed. the dual extended setup provides greater protection from nuisance resets. the max16122Cmax16125 reset output is asserted once for the reset timeout period after each valid manual reset input condition. at least one manual reset input must be released (go high) and then be driven low for the extended setup period before reset asserts again. internal timing circuitry debounces low-to-high manual reset logic transitions, so no external circuitry is required. figure 1a. reset timing diagram t su t db t mrd t rp one-shot pulse on reset mr reset *sreset ( mr1 and mr2 ) gndgnd * sreset is for max16124/max16125 ( ) mr1 and mr2 is for max16122/max16123 gnd max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package www.maximintegrated.com maxim integrated 8 downloaded from: http:///
figure 1b. timeout periods at startup mr reset *sreset *max16124/max16125 only; no reset timeout period at startup v cc v th t rp t db t su mr reset *sreset v cc v th t rp t rp t db t su *max16124/max16125 only; reset timeout period at startup max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package www.maximintegrated.com maxim integrated 9 downloaded from: http:///
supply voltage monitor the max16122Cmax16125 have an internal comparator with a programmable trip threshold to monitor the sup - ply voltage. the v cc monitoring thresholds are select - able through the part number suffix (see the ordering information and table 3 ). applications information falling v cc transients in addition to issuing a reset to the p during power-up, power-down, and brownout conditions, the max16122C max16125 are relatively immune to short-duration fall - ing v cc transients (glitches). the typical operating characteristics show the maximum transient duration vs. v cc overdrive graph for which the max16122C max16125 do not generate a reset pulse. this graph was generated using a falling pulse applied to v cc starting above the actual reset threshold and ending below the threshold by the magnitude indicated (v cc overdrive). the graph indicates the typical maximum pulse width that a falling transient can have without initiating a reset pulse. as the magnitude of the transient increases (go farther below the reset threshold), the maximum allowable pulse width decreases. ensuring a valid reset output down to v cc = 0v (push-pull reset output) the max16122Cmax16125 guarantee proper operation down to v cc = 0.95v. in applications that require valid reset levels down to v cc = 0v, add a pulldown resis - tor between reset and gnd for the push-pull outputs (max16122/max16124). the resistor sinks any stray leakage currents, holding reset low ( figure 2 ). the resistor value used is not critical, but it must be small enough not to overload the reset output when v cc is above the reset threshold. for most applications, use 100k to 1m. this scheme does not work with open- drain outputs of the max16123/max16125. layout and bypassing ensure 0.1f (minimum) capacitance is connected from v cc to gnd. figure 2. ensuring reset output to v cc = 0v 100k ? v cc v cc reset gnd max16122max16124 max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package www.maximintegrated.com maxim integrated 10 downloaded from: http:///
r sel sel gnd max16122max16123 mr1 mr2 reset resetinput v cc 0.1f home pwr vol up vol dn i/0 v cc p i/0 i/0 i/0 1.6v to 5.5v max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package www.maximintegrated.com maxim integrated 11 typical operating circuits (continued) downloaded from: http:///
max16124/max16125 v cc sel mr v cc v cc 1.23v setup delay selector deglitch reset timeout period manual reset setup delay (t su ) gnd resetsreset max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package www.maximintegrated.com maxim integrated 12 functional diagrams downloaded from: http:///
max16122/max16123 v cc sel mr1 v cc v cc 1.23v setup delay selector deglitch deglitch gnd mr2 v cc reset timeout period manual reset setup delay (t su ) reset max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package www.maximintegrated.com maxim integrated 13 functional diagrams (continued) downloaded from: http:///
table 1a. sel pin connection setup delays (t su ) table 1b. resistor-adjusted setup delays (t su ) table 2. reset timeouts (t rp ) table 3. v cc reset threshold voltage (v th ) part suffix setup delays (s) sel = gnd sel = unconnected sel = v cc a 0.5 1 2 b 3 4 5 c 6 8 10 d 13 15 17 e see table 1b resistor (k) setup delays (s) 10 0.5 18 0.9 22 1.1 27 1.35 39 1.95 47 2.35 56 2.8 82 4.1 100 5 180 9 220 11 part suffix minimum reset timeout (ms) a 0.9 b 1.8 c 3.6 d 7.2 e 14.4 f 28.8 g 57.6 h 86.4 i 115.2 j 172.8 k 230.4 l 259.2 m 345.6 n 460.8 o 691.2 p 921.6 q 1843.2 r 3686.4 s 7372.8 suffix v cc reset threshold voltage (v) (typ) 00 no monitoring 16 1.58 17 1.67 22 2.19 23 2.32 29 2.93 31 3.08 44 4.38 46 4.63 max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package www.maximintegrated.com maxim integrated 14 downloaded from: http:///
note: insert the desired setup delay (a to q, from table 1a ) into the blank following the letters wt. insert the letter corresponding to the desired minimum reset timeout period (a to s, from table 2 ) into the blank following the setup delay suffix. insert the two digit number corresponding to the desired nominal reset threshold (from table 3 ) into the blanks following the reset timeout suffix. +denotes a lead(pb)-free/rohs-compliant package. devices are available only in lead-free packaging. t = tape and reel. *future productcontact factory for availability. note: max16125wtdb29+t is a standard option. for additional options, please contact factory. part temp range pin-package max16122 wt_ _ _ _+t* -40c to +125c 6 wlp max16123 wt_ _ _ _+t* -40c to +125c 6 wlp max16124 wt_ _ _ _+t* -40c to +125c 6 wlp max16125 wt_ _ _ _+t -40c to +125c 6 wlp part dual manual reset input sreset sel active-low reset output max16122wt_ _ _ _+t push-pull max16123wt_ _ _ _+t open-drain max16124wt_ _ _ _+t push-pull max16125wt_ _ _ _+t open-drain package type package code outline no. land pattern no. wlp w61f0+1 21-0217 refer to application note 1891 max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package www.maximintegrated.com maxim integrated 15 chip information process: bicmos ordering informationselector guide package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. downloaded from: http:///
revision number revision date description pages changed 0 7/12 initial release 1 11/14 no /v opns in ordering information ; removed automotive reference from applications section 1 2 4/16 updated electrical characteristics table and text 7, 9 maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and speciications without n otice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. max16122Cmax16125 dual pushbutton controllers in tiny 6-bump wlp package ? 2016 maxim integrated products, inc. 16 revision history for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com. downloaded from: http:///

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