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LM56BIMM/NOPB-LM56BIMX/NOPB-LM56CIMM/NOPB
Dual Output Low Power Thermostat
LM56
www.ti.com SNIS120G –APRIL 2000–REVISED FEBRUARY 2013
LM56 Dual Output Low Power Thermostat
Checkfor Samples: LM56
1FEATURES DESCRIPTIONThe LM56isa precision low power thermostat. Two
Digital Outputs Support TTL Logic Levels stable temperature trip points (VT1 and VT2) are
• Internal Temperature Sensor generated by dividing down the LM56 1.250V
2 Internal Comparators with Hysteresis bandgap voltage reference using3 external resistors.
The LM56 has two digital outputs. OUT1 goes LOW
• Internal Voltage Reference when the temperature exceeds T1 and goes HIGH
• Availablein 8-pin SOIC and VSSOP Packages when the the temperature goes below (T1–THYST).
Similarly, OUT2 goes LOW when the temperature
APPLICATIONS exceeds T2 and goes HIGH when the temperature
goes below (T2–THYST). THYSTis an internally set 5°C
• Microprocessor Thermal Management typical hysteresis.
• AppliancesThe LM56is availablein an 8-lead VSSOP surface
• Portable Battery Powered 3.0Vor 5V Systems mount package andan 8-lead SOIC.
• Fan Control Industrial Process Control HVAC Systems Remote Temperature Sensing Electronic System Protection
Table1. Key Specifications
Table2. Temperature Trip Point Accuracy
