The LM56 is a precision low power thermostat. Two stabletemperature trip points (VT1 and VT2) are generated by dividingdown the LM56 1.250V bandgap voltage reference using3 external resistors. The LM56 has two digital outputs. OUT1goes LOW when the temperature exceeds T1 and goes HIGHwhen the the temperature goes below (T1–THYST). Similarly,OUT2 goes LOW when the temperature exceeds T2 and goesHIGH when the temperature goes below (T2–THYST). THYST isan internally set 5°C typical hysteresis.
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