general description the max6509/max6510 are fully integrated, resistor- programmable temperature switches with thresholds set by an external resistor. they require only one external resistor to set the temperature threshold within a wide -40c to +125c temperature range. the max6509 pro - vides an open-drain output. the max6510 features three selectable output options: active-low, active-high, and open drain with an internal pull-up resistor. these switches operate with a +2.7v to +5.5v single supply while providing a temperature threshold accuracy of 0.5c (typ) or 4.7c (max). they typically consume 32a supply current. hysteresis is pin selectable to 2c or 10c. the max6509/max6510 re available in 5-pin and 6-pin sot23 packages, respectively. applications p temperature monitoring in high-speed computers temperature control temperature alarms fan control features 0.5c threshold accuracy 4.7c (max) threshold accuracy (-40c to +125c) temperature threshold set by a 1% external resistor set-hot or set-cold option low 32a supply current open-drain, push-pull outputs; open-drain with internal pull-up resistor pin-selectable 2c or 10c hysteresis sot23 packages +denotes a lead(pb)-free/rohs-compliant package. *a minimum order of 2500 pc. is required for sot packages. **see table 1 for selectable output options. part temp range pin- package top mark max6509cauk+t -40c to +125c 5 sot23-5 adnt max6509hauk+t -40c to +125c 5 sot23-5 adnu max6510caut+t** -40c to +125c 6 sot23-6 aaha max6510haut+t** -40c to +125c 6 sot23-6 aahb gnd v cc out 1 + 5 set max6509 sot23-5 top view 2 3 4 gnd hyst out, out hyst 1 6 v cc outset set max6510 sot23-6 2 3 4 5 + gnd ( ) are for max6510. +2.7v to +5.5v hyst gnd (outset) int gnd p 0.1 f v cc v cc set r set out (out) max6509max6510 max6509/max6510 resistor-programmable sot temperature switches 19-1617; rev 4; 4/14 pin conigurations typical operating circuit ordering information downloaded from: http:///
reference to gnd supply voltage (v cc ) ............... -0.3v to +6v out (max6509) .................................................. -0.3v to +6v out , out (max6510) ......................... -0.3v to (v cc + 0.3v) set, hyst, outset ............................... -0.3v to (v cc + 0.3v) output current (all pins) ..................................................... 20ma input current (all pins) ........................................................ 20ma continuous power dissipation (t a = +70c) 5-pin sot23 (derate 7.1mw/c above +70c) .......... 571mw 6-pin sot23 (derate 8.7mw/c above +70c) .......... 696mw operating temperature range ......................... -40c to +125c junction temperature ...................................................... +150c storage temperature range ............................ -65c to +150c soldering temperature (reflow) ....................................... +260vc lead temperature (soldering, 10s) ................................. +300c note 1: 100% production tested at t a = +25c. specifications over temperature limits are guaranteed by design. (v cc = +2.7v to +5.5v, t a = t min to t max , unless otherwise noted. typical values are at t a = +25c.) (note 1) parameter symbol conditions min typ max units supply voltage range v cc 2.7 5.5 v supply current i cc max6509 32 50 a outset = gnd or v cc (max6510) 47 80 outset = unconnected, out = low 97 165 temperature threshold accuracy t th t a = 0c to +125c 0.5 4.7 c t a = -40c to 0c 0.5 3.7 temperature thresholdhysteresis t hyst hyst = gnd 2 c hyst = v cc 10 hyst input leakage 1 a hyst input threshold v ih v cc - 0.4 v v il 0.4 out impedance to v cc outset = unconnected (max6510) 60 100 160 k ? output voltage high v oh i out = 5ma, outset = gnd or v cc v cc - 0.4 v output voltage low v ol i out = 5ma 0.3 v open-drain output leakage current i out v out = v cc (max6509) 10 a outset voltage v outset max6510 out, active low 0.2 v cc v out, active high 0.85 v cc out, open drain 0.72 v cc 0.55 v cc outset current i outset max6510 v outset = gnd -5.5 a v outset = v cc 5.5 outset = unconnected 0.1 max6509/max6510 resistor-programmable sot temperature switches www.maximintegrated.com maxim integrated 2 electrical characteristics 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. absolute maximum ratings downloaded from: http:///
(v cc = +5v, r pull-up = 10k ? (max6509 only), t a = +25c, unless otherwise noted.) 0 42 86 10 12 -40 25 50 -25 0 75 100 125 hysteresis vs. temperature max6509/10 toc06 temperature (c) hysteresis c) hyst = gnd hyst = v cc 0 0.30.2 0.1 0.50.4 0.90.8 0.7 0.6 1.0 -40 -25 0 25 50 75 100 125 trip point error vs. set temperature max6509/10 toc05 temperature (c) ? error ? ( c) 200ppm 100ppm 50ppm r set 1% r set set resistor tempco v cc = +5v -0.20 -0.10-0.15 0 -0.05 0.150.10 0.05 0.20 -50 0 -25 25 50 75 100 125 trip threshold offset vs. temperature max6509/10 toc04 temperature (c) set point offset ( c) v cc = +2.7v v cc = +3.3v v cc = +3.3v v cc = +2.7v v cc = +5v 0 3020 10 5040 9080 70 60 100 0 20 40 60 80 100 120 140 r set vs. temperature (t a = 0c to +125c) max6509/10 toc03 temperature (c) r set (k ? ) 90 100 120110 140 150130 160 -40 -30 -25 -35 -20 -15 -10 -5 0 r set vs. temperature (t a = -40 c to 0 c) max6509/10 toc02 temperature (c) r set (k ? ) 10 2015 3025 4540 35 50 -50 0 -25 25 50 75 100 125 supply current vs. temperature max6509/10 toc01 temperature (c) supply current (a) v cc = +5v v cc = +3.3v v cc = +2.7v r set = 0 outset = gnd (max6510) max6509/max6510 resistor-programmable sot temperature switches maxim integrated 3 www.maximintegrated.com typical operating characteristics downloaded from: http:///
detailed description the max6509/max6510 fully integrated temperature switches incorporate two temperature-dependent refer - ences and one comparator. one reference exhibits a positive temperature coefficient, and the other has a negative temperature coefficient. the temperature at which the two reference voltages are equal determines the temperature trip point. pin-selectable 2c or 10c hysteresis keeps the output from oscillating when the temperature is close to the threshold. the max6509 has an active-low, open-drain output structure that can only sink current. the max6510 has three different out- put options from which to choose (table 1). the max6509/max6510 are programmable for a wide range of temperature thresholds from -40c to +125c. the temperature threshold is set by an external resis - tor between set and gnd. the max6509 output easily interfaces with a microprocessor (p) reset input (figure 2). the max6510 output is intended for applica - tions such as driving a fan control switch (figure 3). hysteresis input the hyst pin is a cmos-compatible input that selects hysteresis at either a high level (10c for hyst = v cc ) or a low level (2c for hyst = gnd). hysteresis prevents the output from oscillating when the temperature is near the trip point. do not leave hyst unconnected. connect hyst to gnd or v cc . other input voltages cause increased supply current. choose the set-hot temperature (h) or set-cold tempera - ture (c) option to ensure that the trip point is accurate and the hysteresis is in the right direction. a max6509 or max6510 with the h suffix will first trip at the correct point when temperature is increasing. for example, a max6509hauk+t or max6510haut+t with its trip point set to 100c will assert when its temperature rises above +100c, and will not deassert until its tempera - ture drops below +100c minus the selected hysteresis value (e.g., +98c if 2c hysteresis is chosen). con- versely, if the trip temperature of a max6509cauk+t or max6510caut+t is -40c, the output asserts at -40c as temperature falls, and deasserts when tem- perature rises above -40c plus the hysteresis value (e.g., -38c if 2c hysteresis is chosen) as shown in figure 4. output selection the max6509 provides an open-drain output. the max6510 features three output options selectable by outset (table 1). outset out connected to v cc active high connected to gnd active low unconnected open drain with internal pull-up resistor pin name function max6509 max6510 1 1 set temperature set point. connect an external 1% resistor from set to gnd to set trip point. 2 2 gnd ground 3 out open-drain output. reset to high impedance during power-on. 3 out, out open-drain with internal pull-up resistor, active-high, or active-low output.see table 1. reset to deassert during power-on. 4 4 hyst hysteresis selection. hysteresis is 10c for hyst = v cc , 2c for hyst = gnd. 5 6 v cc power-supply input 5 outset trilevel control input:outset = v cc sets out to active high. outset = gnd sets out to active low.outset = unconnected sets out to open drain with internal pull-up resistor. max6509/max6510 resistor-programmable sot temperature switches www.maximintegrated.com maxim integrated 4 table 1. max6510 outset-selectable outputs pin description downloaded from: http:///
figure 1. block and functional diagrams positive tempco reference negative tempco reference hyst network outhyst out temp t th hysteresis* v max6509hauk+t positive tempco reference negative tempco reference hyst network outhyst out temp t th t th v positive tempco reference negative tempco reference hyst network out hyst out temp v positive tempco reference negative tempco reference hyst network out outset = v cc outset = v cc hyst out temp t th max6510haut+t max6509cauk+t max6510caut+t max6509 with a pull-up resistor max6510 max6509 with a pull-up resistor max6510 hysteresis* hysteresis* *hysteresis is 10c for hyst = v cc and 2c for hyst = gnd. hysteresis* max6509/max6510 resistor-programmable sot temperature switches www.maximintegrated.com maxim integrated 5 downloaded from: http:///
applications information thermal considerations the max6509/max6510 supply current is typically 32a. when used to drive high-impedance loads, the devices dissipate negligible power; therefore, the die temperature is essentially the same as the package temperature. the key to accurate temperature monitor - ing is good thermal contact between the max6509/ max6510 package and the device being monitored. in some applications, the sot23-5 and sot23-6 pack - ages may be small enough to fit underneath a socketed ?p, allowing the device to monitor the ps temperature directly. use the monitors output to reset the p, assert an interrupt, or trigger an external alarm. accurate tem - perature monitoring depends on the thermal resistance between the device being monitored and the max6509/ max6510 die. the rise in die temperature due to self-heating is given by the following formula: ?t j = p diss ja where pdiss is the power dissipated by the max6509/ max6510, and qja is the packages thermal resistance. the typical thermal resistance is 115c/w for the sot23- 6 package. to limit the effects of self-heating, minimize the output currents. for example, if the max6510 sinks 5ma, the output voltage is guaranteed to be less than 0.3v; therefore, an additional 1.5mw of power is dissi - pated within the ic. this corresponds to a 0.173c shift in the die temperature in the sot23-6. temperature-window detector the max6509/max6510 temperature switch outputs assert when the die temperature is outside the pro - grammed range. combining the outputs of a set-cold and a set-hot device creates an over/undertemperature detector. the max6509/max6510 are designed to form two complementary pairs, each containing one cold trip point output and one hot trip point output. the assertion of either output alerts the system to an out-of-range tem- perature. the max6510 push-pull output stages can be ored to produce a thermal out-of-range alarm. more favorably, a max6509hauk+t and max6509cauk+t can be directly wire-ored with a single external resistor to accomplish the same task (figure 5). the temperature window (alarms or detectors as in figure 5) can be used to accurately determine when a devices temperature falls out of a programmed range, for example -3c to +75c as shown in figure 5. the thermal overrange signal can be used to assert a ther- mal shutdown, power-up, recalibration, or other tem- perature-dependent function. figure 4. temperature response figure 3. overtemperature fan control figure 2. microprocessor alarm/reset thyst = 2 c set hot outout temperature max6509hmax6510c outset = gnd set cold 98 c 100 c t threshold = -10 c t threshold = 65 c 100 c 98 c -38 c -40 c -38 c -40 c max6510 +5v out gnd v cc r set outset set hyst p fan heat v cc max6509 +3.3v gnd set hyst v cc p heat v cc r pull-up 100k r set out int shutdown or reset max6509/max6510 resistor-programmable sot temperature switches www.maximintegrated.com maxim integrated 6 downloaded from: http:///
low-cost, fail-safe temperature monitor in high-performance/high-reliability applications, multi- ple temperature monitoring is important. the high-level integration and low cost of the max6509/max6510 facilitate the use of multiple temperature moni - tors to increase system reliability. figure 6 shows two max6510s with different temperature thresholds. this ensures that fault conditions that can overheat the mon-itored device cause no permanent damage. the first temperature monitor activates the fan when the die temperature exceeds +45c. the second max6510 triggers a system shutdown if the die temperature reaches +75c. the second temperature monitors out- put asserts when a wide variety of destructive fault con- ditions occur, including latchups, short circuits, and cooling-system failures. set-point resistor to set the trip-point temperature, connect a resistor between set and gnd. the resistors value is deter - mined either from the r set vs. temperature graphs (see typical operating characteristics ) or from the equations below. to set the temperature trip point from -40c to 0c, use the following equation: r set (k?) = [(1.3258 10 5 ) / (t+1.3)] - 310.1693 - [(5.7797 10 6 ) / (t+1.3) 2 ] to set the temperature trip point from 0c to +125c, use the following equation: r set (k?) = [(8.3793 10 4 ) / t] - 211.3569 + [(1.2989 10 5 ) / t 2 ] where t is the trip temperature in kelvin. figure 6. low-power, high-reliability, fail-safe temperature monitor figure 5. temperature-window detector max6510haut gnd hyst +5v 30k r set max6510haut gnd hystset v cc v cc out set out outset outset temperature fault fan control p heat heat 55k r set v cc v cc max6509cauk max6509hauk +5v hyst set hyst gnd v cc gnd v cc r pull-up 100k out out out of range max6510haut hyst v cc v cc 100k r set r set r set 100k 30k outset gnd +5v max6510caut gnd set outset hyst v cc v cc out 30k out out of range overtemp undertemp r set max6509/max6510 resistor-programmable sot temperature switches www.maximintegrated.com maxim integrated 7 downloaded from: http:///
package type package code outline no. land pattern no. 5 sot23 u5+1 21-0057 90-0174 6 sot23 u6+1 21-0058 90-0175 max6509/max6510 resistor-programmable sot temperature switches www.maximintegrated.com maxim integrated 8 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. chip information transistor count: 234 downloaded from: http:///
revision number revision date description pages changed 3 5/13 converted opns in ordering information to lead(pb)-free 1 4 4/14 no /v opns; removed automotive reference from applications section 1 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. max6509/max6510 resistor-programmable sot temperature switches maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. ? 2014 maxim integrated products, inc. 9 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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