LM56BIMX/NOPB HVAC Temperature Sensors Thermostats Dual Output Lo Pwr Thermostat
FEATURES
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
Electronic System Protection
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.
The LM56 is available in an 8-lead VSSOP surface mount package and an 8-lead SOIC.