Part # LM66 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM66 Dual Output Internally Preset Thermostat

Part Details:

LM66 April 2000 Dual LM66 Output Dual Output Internally Preset ThermostatGeneral Description Features The LM66 is a precision low power thermostat. Two stable n Digital outputs support TTL logic levels Internally temperature trip points (V and V ) are generated by T1 T2 n Internal temperature sensor dividing down the LM66 1.250V bandgap voltage reference n 2 internal comparators with hysteresis using a resistors divider network. The LM66 has two digital n Internal voltage reference outputs. OUT1 goes LOW when the temperature exceeds T1 n Currently available in 8-pin SO plastic package and goes HIGH when the the temperature goes below(T1­T ). Similarly, OUT2 goes LOW when the tempera- HYST Key Specifications ture exceeds T2 and goes HIGH when the temperature goes Preset below (T2­T ). T is an internally set 5°C typical HYST HYST j Power Supply Voltage 2.7V to 10V hysteresis. j Power Supply Current 250 µA (max) The LM66 is currently available in an 8-lead small outlinepackage. j V 1.250V ±1.4% REF (max) Thermostat Applications j Hysteresis Temperature 5°C n Microprocessor Thermal Management j Internal Temperature Sensor (+6.20 mV/°C x T) n Appliances Output Voltage +400mV n Portable Battery Powered 3.0V or 5V Systems j Temperature Trip Point ±3°C (max)

Please click the following link to download the datasheet:

LM66.pdf Datasheet