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LM56
www.ti.com SNIS120G – APRIL 2000 – REVISED FEBRUARY 2013 LM56 Dual Output Low Power Thermostat
Check for Samples: LM56 FEATURES DESCRIPTION The LM56 is a precision low power thermostat. Two
stable temperature trip points (VT1 and VT2) are
generated by dividing down the LM56 1.250V
bandgap voltage reference using 3 external resistors.
The LM56 has two digital outputs. OUT1 goes LOW
when the temperature exceeds T1 and goes HIGH
when the the temperature goes below (T1–THYST).
Similarly, OUT2 goes LOW when the temperature
exceeds T2 and goes HIGH when the temperature
goes below (T2–THYST). THYST is an internally set 5°C
typical hysteresis. 1 2 Digital Outputs Support TTL Logic Levels
Internal Temperature Sensor
2 Internal Comparators with Hysteresis
Internal Voltage Reference
Available in 8-pin SOIC and VSSOP Packages APPLICATIONS Microprocessor Thermal Management
Appliances
Portable Battery Powered 3.0V or 5V Systems
Fan Control
Industrial Process Control
HVAC Systems
Remote Temperature Sensing …
