MAX6511

 Continuously Measure External JunctionTemperature
 Factory-Programmed Temperature Thresholdfrom +45°C to +125°C in 10°C Increments
 Insensitive to Series Parasitic Resistance
 Active-Low CMOS Output (MAX6511) or Open-Drain Output for Overtemperature(MAX6512) or Active-High Output(MAX6513) forDirect Fan Control
 <100ms Response Time
 Accuracy
 ±3°C (TREMOTE = +45°C to +125°C, TA = -5°C to +55°C)
 ±5°C (TREMOTE = +45°C to +125°C, TA = -40°C to +85°C)
 Pin-Selectable 5°C or 10°C Hysteresis
 400µA Average Current Consumption
 +3.0V to +5.5V Supply Range
 6-Pin SOT23 Package

The MAX6511/MAX6512/MAX6513 are fully integrated,remote temperature switches that use an external P-Njunction (typically a diode-connected transistor) as thesensing element to measure the remote temperature.These MAX6511 assert a logic signal when the tempera-ture crosses a factory-programmed threshold. Availabletrip thresholds arefrom +45°C to +125°C in 10°C incre-ments. Accuracy of MAX6511 is within ±3°C (TA = -5°C to +55°C) or±5°C (TA = -40°C to +85°C). Hysteresis is pin selec-table to 5°C or 10°C.

The MAX6511 has an active-low CMOS output and theMAX6513 has an active-high CMOS output. TheMAX6512 has an open-drain output. The output isasserted when the temperature exceeds the thresholdvalue. The active-low open drain output is intended tointerface with a microprocessor (P) reset or interruptinput. The active-high CMOS output of MAX6511 can directly drive apower FET to control a cooling fan. 

The MAX6511/MAX6512/MAX6513 operate from a+3.0V to +5.5V supply and typically consume 400A ofsupply current. They are available in a small 6-pinSOT23 package.