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LM56BIM-LM56BIMM-LM56BIMX-LM56CIM-LM56CIMM-LM56CIMMX-LM56CIMX
Dual Output Low Power Thermostat
LM56
Dual Output Low Power Thermostat
General Description

The LM56isa precision low power thermostat. Two stable
temperature trip points (VT1 and VT2) are generatedby
dividing down the LM56 1.250V bandgap voltage reference
using3 external resistors. The LM56 has two digital outputs.
OUT1 goes LOW when the temperature exceedsT1 and
goes HIGH when the the temperature goes below
(T1–THYST). Similarly, OUT2 goes LOW whenthe tempera-
ture exceedsT2 and goes HIGH whenthe temperature goes
below (T2–THYST). THYSTisan internally set 5˚C typical
hysteresis.
The LM56is availableinan 8-lead Mini-SO8 surface mount
package andan 8-lead small outline package.
Applications
Microprocessor Thermal Management Appliances Portable Battery Powered 3.0Vor5V Systems Fan Control Industrial Process Control HVAC Systems Remote Temperature Sensing Electronic System Protection
Features
Digital outputs support TTL logic levels Internal temperature sensor2 internal comparators with hysteresis Internal voltage reference Availablein 8-pin SO and Mini-SO8 plastic packages
Key Specifications
Power Supply Voltage 2.7V–10V Power Supply Current 230µA (max) VREF 1.250V ±1% (max) Hysteresis Temperature 5˚C Internal Temperature Sensor Output Voltage:
(+6.20 mV/˚CxT) +395 mV Temperature Trip Point Accuracy:
LM56BIM LM56CIM

+25˚C ±2˚C (max) ±3˚C (max)
+25˚Cto +85˚C ±2˚C (max) ±3˚C (max)
−40˚Cto +125˚C ±3˚C (max) ±4˚C (max)
Simplified Block Diagram and
Connection Diagram

Order
Number
LM56BIM LM56BIMX LM56CIM LM56CIMX LM56BIMM LM56BIMMX LM56CIMM LM56CIMMX Package
Number
M08A M08A M08A M08A MUA08A MUA08A MUA08A MUA08A
SOP-8 SOP-8 SOP-8 SOP-8 MSOP-8 MSOP-8 MSOP-8 MSOP-8
Transport
Media
2500 Units 2500 Units 1000 Units 3500 Units 1000 Units 3500 Units
Rail Tape&
Reel
Rail Tape&
Reel
Tape& Reel Tape& Reel Tape& Reel Tape& Reel
Package
Marking
LM56BIM LM56BIM LM56CIM LM56CIM T02B T02B T02C T02C
May 2004
LM56
Dual
Output
Low
Power
Thermostat
ic,good price


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