general description the max6505?ax6508 temperature switches have dual logic outputs that assert when the die temperature cross- es their trip thresholds. trip thresholds are factory pro- grammed to convenient temperatures in 5? increments. the max6505/max6506 have an alarm output that asserts when the temperature is above the factory-pro- grammed thresholds (available from -40? to +125?). they also have a warn output that asserts when the temperature is several degrees below the alarm thresh- old. the difference between the alarm and warn thresholds ( t aw ) is pin selectable to +5?, +10?, +20?, or +30?. the max6505? logic outputs are open drain, while the max6506? logic outputs are push-pull. the max6507 has open-drain outputs ( over , ok), and the max6508 has push-pull outputs (over, ok ), each with two factory-programmed threshold temperatures (t over and t under ) in the wide range of -40? to +125?. the overtemperature output asserts when the temperature is above t over . when the temperature is in the desired window (less than t over and greater than t under ), ok ( ok ) asserts. the max6505?ax6508 are accurate to ?.5 c (typ), ?.5 c (max). operating from a +2.5v to +5.5v supply, these low-cost devices typically consume 30? supply current and require no external components for setting trip points. the max6505?ax6508 are available in a 6-pin sot23 package. ________________________applications ? temperature monitoring in high-speed computers temperature control temperature alarms fan control features ? 0.5c (typ) threshold accuracy over full temperature range ? no external components required ? low cost ? 30 a (typ) supply current ? factory-programmed thresholds from -40c to +125c in 5c increments ? open-drain outputs (max6505/max6507), push-pull outputs (max6506/max6508) ? pin selectable 2c, 10c hysteresis (max6507/max6508) ? pin selectable +5c, +10c, +20c, +30c t alarm - t warn (max6505/max6506) ? sot23 package note: to complete the suffix information for the max6505/ max6506, add p or n for positive or negative trip tempera- ture, and select an available trip point in degrees centigrade. for example, the max6505utp055+t describes a max6505 in a sot23 package with a +55? threshold (table 3). contact the factory for pricing and availability of temperature versions (minimum order 10,000 pieces). to complete the suffix information for max6507/max6508, see table 4. + denotes a lead(pb)-free/rohs-compliant package. t = tape and reel. max6505?ax6508 dual trip sot temperature switches ________________________________________________________________ maxim integrated products 1 pin configurations 19-1712; rev 1; 2/11 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information part temp range pin-package max6505 ut_ _ _ _+t -40c to +125c 6 sot23 max6506 ut_ _ _ _+t -40c to +125c 6 sot23 max6507 ut_ _ _ _+t -40c to +125c 6 sot23 max6508 ut_ _ _ _+t -40c to +125c 6 sot23 selector guide appears at end of data sheet. top view gnd v cc s1 16 + 5 s0 max6505 max6506 sot23 2 34 warn (warn) alarm (alarm) ( ) are for max6506. gnd v cc s0 16 5 n.c. max6507 max6508 sot23 2 34 ok (ok) over (over) ( ) are for max6508. + typical operating circuits appear at end of data sheet.
max6505?ax6508 dual trip sot temperature switches 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = +2.5v to +5.5v, r pullup = 100k (max6505/max6507 only), t a = -40 c to +125 c, unless otherwise noted. typical values are at t a = +25? and v cc = +5v, unless otherwise noted.) (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. supply voltage (v cc to gnd) ..................................-0.3v to +6v s1, s0 to gnd ............................................-0.3v to (v cc + 0.3v) all other pins to gnd.................................-0.3v to (v cc + 0.3v) input/output current, all pins...........................................?0ma continuous power dissipation (t a = +70?) sot23 (derate 8.7mw/? above +70?) ....................696mw operating temperature range (t min to t max ) ..-40? to +125? thermal resistance ( ja )...............................................115?/w storage temperature range .............................-65? to +150? maximum die temperature..............................................+150? lead temperature (soldering, 10s) .................................+300? soldering temperature (reflow) .......................................+260? parameter symbol conditions min typ max units supply voltage range v cc 2.5 5.5 v s0 = s1 = gnd max6505/ max6506 40 80 supply current i cc s0 = gnd max6507/ max6508 30 60 a -40 c to 0 c -5.5 0.5 5.5 0 c to +95 c -3.5 0.5 3.5 temperature threshold accuracy (note 2) t th +95 c to +125 c -4 0.5 4 c s1 = gnd, s0 = gnd 5 s1 = gnd, s0 = v cc 10 s1 = v cc , s0 = gnd 20 delta temperature (t alarm -t warning ) max6505/max6506 t aw s1 = v cc , s0 = v cc 30 c alarm (max6505/max6506) 2 t aw = 5 c or 10 c 5 warn (max6505/max6506) t aw = 20 c or 30 c 10 s0 = gnd 2 temperature threshold hysteresis (note 3) t hyst ok, over (max6507/max6508) s0 = v cc 10 c v ih 0.8 x v cc logic input levels (s1, s0) v il 0.8 v i source = 500 a, v cc > 2.5v 0.8 x v cc output voltage high (max6506/max6508) v oh i source = 800 a,v cc > 4.5v v cc -1.5 v i sink = 3.2ma, v cc > 2.5v 0.5 output voltage low v ol i sink = 5ma, v cc > 4.5v 0.5 v
max6505?ax6508 dual trip sot temperature switches _______________________________________________________________________________________ 3 20 30 25 40 35 45 50 -40 -10 5 20 -25 35 50 65 80 95 110 125 supply current vs. temperature max6505/8-01 temperature ( c) supply current (?) v cc = +5v r pullup = 100k 0.5 1.0 1.5 2.0 2.5 -40 -10 5 -25 20 35 50 65 80 95 110 125 hysteresis vs. trip temperature max6505/8-02 temperature ( c) hysteresis ( c) v cc = +5v r pullup = 100k -0.8 -0.6 -0.7 -0.3 -0.4 -0.5 0 -0.1 -0.2 0.1 2.5 3.5 3.0 4.0 4.5 5.0 5.5 trip-point error (%) vs. supply voltage max6505/8-03 supply voltage (v) trip-point error (%) normalized to trip-point temperature at v cc = +5v max6505 startup and power-down (t < t th ) max6505/8-04 a b a: v cc pulse b: alarm voltage, r pullup = 100k 100?/div 2v/div max6505 startup delay (t > t th ) max6505/8-05 a b a: v cc pulse b: alarm voltage, r pullup = 100k 100?/div 2v/div typical operating characteristics (v cc = +5v, unless otherwise noted.) electrical characteristics (continued) (v cc = +2.5v to +5.5v, r pullup = 100k (max6505/max6507 only), t a = -40? to +125?, unless otherwise noted. typical values are at t a = +25? and v cc = +5v, unless otherwise noted.) (note 1) note 1: 100% production tested at t a = +25?. specifications over temperature limits are guaranteed by design. note 2: t alarm , t under , and t over are factory-programmed temperature trip thresholds from -40? to +125? in 5? increments. note 3: temperature threshold hysteresis is defined as the difference from positive-going temperature thresholds minus the nega- tive-going temperature thresholds. parameter symbol conditions min typ max units v cc = 5.5v, v alarm = 5.5v, v warn = 5.5v (max6505) 1 open-drain output leakage current v cc = 5.5v, v ok = 5.5v, v over = 5.5v (max6507) 1 a
max6505?ax6508 dual trip sot temperature switches 4 _______________________________________________________________________________________ pin description pin max6505 max6506 max6507 max6508 name function 1- - warn open-drain active-low warning output. warn goes low when the die temperature exceeds t warn = t alarm - t aw. - 1 - - warn push-pull active-high warning output. warn goes high when the die temperature exceeds t warn = t alarm - t aw. 2 2 2 2 gnd ground 3, 5 3, 5 - - s1, s0 delta temperature select input. connect to v cc or gnd to select the difference between t alarm and t warn (table 1 or see electrical characteristics ). - - 3 3 s0 hysteresis select input. connect to v cc for 10 c hysteresis. connect to gnd for 2 c hysteresis. 4444v cc supply voltage input. bypass v cc to gnd with a 0.1 f ceramic capacitor. - - 5 5 n.c. no connection. not internally connected. - - 6 - over open-drain active-low overtemperature output. over goes low when the die temperature exceeds the factory- set value of t over . - - _ 6 over push-pull active-high overtemperature output. over goes high when the die temperature exceeds the factory- set value of t over. - - 1 - ok open-drain active-high temperature sensor output. ok goes high impedance when the die temperature is between the factory-set values of t over and t under . when the die temperature is above t over or below t under , ok goes low. - - - 1 ok push-pull active-low temperature sensor output. ok goes low when the die temperature is between the factory- set values of t over and t under . when the die temp- erature is above t over or below t under , ok goes high. 6- - - alarm open-drain active-low alarm output. alarm goes low when the die temperature exceeds the factory-set value of t alarm . - 6 - - alarm push-pull active-high alarm output. alarm goes high when the die temperature exceeds the factory-set value of t alarm .
max6505?ax6508 dual trip sot temperature switches _______________________________________________________________________________________ 5 _______________detailed description the max6505?ax6508 fully integrated temperature switches incorporate two temperature-dependent refer- ences and a comparator. one reference exhibits a pos- itive temperature coefficient and the other a negative temperature coefficient. the temperature at which the two reference voltages are equal determines the tem- perature trip point. there are two versions, each of which has two logic outputs. the max6505/max6506 have a main trip point (t alarm ) and a lower, ?arning?trip point (t warn ). when the die temperature rises above these trip points, the alarm and warn outputs are asserted (figure 1). the differ- ence between the two trip points ( t aw ) is pin selec- table to +5?, +10?, +20?, or +30? by connecting the two control pins (s0 and s1) high or low (table 1). max6505 has open-drain active-low outputs; max6506 has push-pull active-high outputs. the max6507/max6508 have two factory-programmed threshold temperatures (t over and t under ) and two outputs (ok and over). one output (ok) asserts when the temperature is between t over and t under . the other output (over) asserts when the temperature is above t over . table 4 shows the hex codes to deter- mine the part numbers associated with specific values of t over and t under . the first hex code indicates the lower trip point (t under ) and the second indicates the higher trip point (t over ). for example, a part with t un- der = -10? and t over = +75? will have the part number max6508uta04b (table 4 and figure 2). max6507 has open-drain outputs; max6508 has push- pull outputs. hysteresis selection the temperature threshold hysteresis for the alarm output of the max6505/max6506 is 2?. the hysteresis for the warn output depends on the value of t aw . if t aw is 5? or 10? (set by s0 and s1), warn hys- teresis is 5?. if t aw is 20? or 30?, warn hystere- sis is 10?. max6507 and max6508 have pin- selectable hysteresis of 2? or 10? for both over and ok out- puts (table 2). applications information thermal considerations the max6505?ax6508 supply current is typically 30?. 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 max6505 max6508 package and the device being monitored. in some applications, the sot23 packages may be small enough to fit underneath a socketed microprocessor (?), allowing the device to monitor the ?? tempera- ture directly. use the monitor? output to reset the ?, assert an interrupt, or trigger an external alarm. accurate temperature monitoring depends on the ther- mal resistance between the device being monitored and the max6505?ax6508 die. the rise in die temperature due to self-heating is given by the following formula: t j = p dissipation ? ja where p dissipation is the power dissipated by the max6505?ax6508, and ja is the package? thermal resistance. the typical thermal resistance is 115?/w for the sot23 package. to limit the effects of self-heating, minimize the output currents. for example, if the max6505 sinks 5ma, the output voltage is guaranteed to be less than 0.5v. therefore, an additional 2.5mw of figure 1. temperature response?ax6505utp065 outputs, t aw = 10?, and warn hysteresis 5? hysteresis 2? hysteresis 5? 65? 55? warn alarm table 1. max6505/max6506 t aw selection table control pins description s1 s0 t aw =t alarm C t warn ( c) gnd gnd 5 gnd v cc 10 v cc gnd 20 v cc v cc 30
max6505?ax6508 dual trip sot temperature switches 6 _______________________________________________________________________________________ figure 2. temperature response?ax6507a04b outputs with 2? hysteresis figure 3. low-power, high-reliability, fail-safe temperature monitor +75 c -10 c hysteresis 2 c -10 c hysferesis 2 c over ok temperature +2.5v to +5.5v system shutdown fan control s0 s1 warn gnd v cc alarm max6506 * * t aw = t alarm - t warn is set to +30?. table 2. hysteresis selection typical threshold hysteresis part alarm conditions warn conditions ok, over 2 c? c t wa = 5 c or 10 c max6505 max6506 10 c t wa = 20 c or 30 c - 2 c s0 = gnd max6507 max6508 - 10 c s0 = v cc power is dissipated within the ic. this corresponds to a +0.288? shift in the die temperature in the sot23. power supply and bypassing the max6505 and max6508 operate from a single- supply voltage in the +2.5v to +5.5v range. connect a 0.1? capacitor on the supply voltage line close to the v cc pin for bypassing. low-cost, fail-safe temperature monitor the max6505/max6506 provide two outputs that can be used for fail-safe temperature applications (figure 3). for example, the first output can activate a fan when the die temperature exceeds a certain preset temperature. the second output asserts at a higher temperature that could be caused by a wide variety of destructive fault condi- tions, including latchup, short circuit, and cooling system failure. this output can be used to initiate such actions as shutdown of the entire system (see typical operating circuits ) . the high-level integration, low cost, and small size of the max6505?ax6508 facilitate the use of multiple temper- ature monitors to increase system reliability.
max6505?ax6508 dual trip sot temperature switches _______________________________________________________________________________________ 7 part suffix trip point ( c) top mark max6505 utn035 -35 aakk max6505 utn030 -30 aakl max6505 utn025 -25 aakm max6505 utn020 -20 aakn max6505 utn015 -15 aako max6505 utn010 -10 aakp max6505 utn005 -5 aakq max6505 utp000 0 aakr max6505 utp005 5 aaks max6505 utp010 10 aakt max6505 utp015 15 aaku max6505 utp020 20 aakv max6505 utp025 25 aakw max6505 utp030 30 aakx max6505 utp035 35 aaky max6505 utp040 40 aakz max6505 utp045 45 aala max6505 utp050 50 aalb max6505 utp055 55 aalc max6505 utp060 60 aald max6505 utp065 65 aale max6505 utp070 70 aalf max6505 utp075 75 aalg max6505 utp080 80 aalh max6505 utp085 85 aali max6505 utp090 90 aalj max6505 utp095 95 aalk max6505 utp100 100 aall max6505 utp105 105 aalm max6505 utp110 110 aaln max6505 utp115 115 aalo max6505 utp120 120 aalp max6505 utp125 125 aalq part suffix trip point ( c) top mark max6506 utn035 -35 aalr max6506 utn030 -30 aals max6506 utn025 -25 aalt max6506 utn020 -20 aalu max6506 utn015 -15 aalv max6506 utn010 -10 aalw max6506 utn005 -5 aalx max6506 utp000 0 aaly max6506 utp005 5 aalz max6506 utp010 10 aama max6506 utp015 15 aamb max6506 utp020 20 aamc max6506 utp025 25 aamd max6506 utp030 30 aame max6506 utp035 35 aamf max6506 utp040 40 aamg max6506 utp045 45 aamh max6506 utp050 50 aami max6506 utp055 55 aamj max6506 utp060 60 aamk max6506 utp065 65 aaml max6506 utp070 70 aamm max6506 utp075 75 aamn max6506 utp080 80 aamo max6506 utp085 85 aamp max6506 utp090 90 aamq max6506 utp095 95 aamr max6506 utp100 100 aams max6506 utp105 105 aamt max6506 utp110 110 aamu max6506 utp115 115 aamv max6506 utp120 120 aamw max6506 utp125 125 aamx table 3. max6505/max6506 suffix and top mark codes
temperature-window alarm the max6507 and max6508 have an output (ok, ok ) that indicates the die temperature is within the selected temperature window. this output is asserted when within the window, and deasserted when outside the window. additionally, a second digital output indicates when the die temperature is above the upper set point. this is useful in systems where operation is optimized over a predetermined temperature range. the thermal overrange signal can be used to assert a thermal shut- down, power-up, recalibration, or other temperature- dependent function (figure 4 and typical operating circuits ). chip information process: bicmos trip temperature ( c) hex code* -40 82 -35 87 -30 8c -25 91 -20 96 -15 9b -10 a0 -5 a5 000 505 10 0a 15 0f 20 14 25 19 30 1e 35 23 40 28 45 2d 50 32 55 37 60 3c 65 41 70 46 75 4b 80 50 85 55 90 5a 95 5f 100 64 105 69 110 6e 115 73 120 78 125 7d max6505?ax6508 dual trip sot temperature switches 8 _______________________________________________________________________________________ table 4. max6507/max6508 trip temperature code *two hex codes are used in the suffix. the first indicates the the low trip temperature and the second indicates the high trip temperature. for example, the MAX6507UT8255+t has a lower trip point of -40 c and an upper trip point of +85 c. +2.5v to +5.5v out of range shutdown s0 over gnd v cc ok max6508 figure 4. temperature-window alarms package information for the latest package outline information and land patterns (footprints), go to www.maxim-ic.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. package type package code outline no. land pattern no. 6 sot23 u6sn+1 21-0058 90-0175
max6505?ax6508 +2.5v to +5.5v s1 s0 warn gnd fan v cc v cc alarm max6506 +2.5v to +5.5v s0 over gnd v cc max6508 ok +2.5v to +5.5v s1 s0 warn gnd v cc alarm max6505 int shdn r 1 r 2 gnd v cc p int gnd v cc p fan v cc int gnd v cc p typical operating circuits part output logic output stage temperature threshold range max6505 alarm , warn open drain -40 c to +125 c max6506 alarm, warn push-pull -40 c to +125 c max6507 over , ok open drain -40 c to +125 c max6508 over, ok push-pull -40 c to +125 c selector guide dual trip sot temperature switches _______________________________________________________________________________________ 9
max6505?ax6508 dual trip sot temperature switches 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. 10 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2011 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 0 4/00 initial release 1 2/11 changed all leaded parts to lead(pb)-free parts in the ordering information table; in the absolute maximum ratings section changed the continuous power dissipation numbers (7.1mw/c to 8.7mw/c and 571mw to 696mw) and added the soldering temperature; added the package information table 1, 2, 8
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