National Semiconductor | High-performance Analog

 

 LM56   
Dual Output Low Power Thermostat from the PowerWise® Family		 Click link to Download

Features

  • Digital outputs support TTL logic levels
  • Internal temperature sensor
  • 2 internal comparators with hysteresis
  • Internal voltage reference
  • Available in 8-pin SO and Mini-SO8 plastic packages

    • 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 Mini-SO8 surface mount package and an 8-lead small outline package.

    Key Specification
    ■  Power Supply Voltage 2.7V–10V
    ■  Power Supply Current 230 μA (max)
    ■  VREF 1.250V ±1% (max)
    ■  Hysteresis Temperature 5°C
    ■  Internal Temperature Sensor Output Voltage:
    (+6.20 mV/°C x T) + 395 mV

  • Temperature Trip Point Accuracy:
    •   LM56BIM LM56CIM
    +25°C ±2°C (max) ±3°C (max)
    +25°C to +85°C ±2°C (max) ±3°C (max)
    −40°C to +125°C ±3°C (max) ±4°C (max)


    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




    • Typical Application
    click for larger image


    		Block Diagram
    *click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    SetPoint Type Resistor Selectable
    Temperature Accuracy (+/-) 2, 3 deg C
    Supply Min 2.7 Volt
    Temperature Min -40 deg C
    Temperature Max 125 deg C
    Quiescent Current_ 230 uA
    Comparators 2
    Sensor Gain 6.2 mV/Deg C
    Remote Diode Thermal Sensors Undefined
    Supply Max 10 Volt
    VtempOutput Impedance 1500 Ohm
    Reference Output 1.25 Volt
    Quiescent Current 0.23 mA
    PowerWise Yes

    Datasheets
    TitleSizeDateOther
    Language
    LM56 Dual Output Low Power Thermostat500
    Kbytes    		19-Sep-11日本語  


    Other Technical Documents
    TitleTypeDate
    Temperature Sensors HandbookApp Note 2003-03-13

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM56BIM/NOPB

    LM56BIM

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide987
    AVNET-EMWorldwide1936
    DIGI-KEYWorldwide2702
    FARNELLEurope and Asia365
    NEWARKAmericas186
    RS COMPONENTSWorldwide128
    TAYLORAmericas1937
    		$0.85 each at 1K+ pcsrail
    of
    95
    LM56BIMM/NOPB

    LM56BIMM

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1880
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide1528
    FARNELLEurope and Asia417
    MOUSERWorldwide631
    NEWARKAmericas523
    RS COMPONENTSWorldwide905
    TAYLORAmericas1880
    		$1.00 each at 1K+ pcsreel
    of
    1000
    LM56BIMMX/NOPB

    LM56BIMMX

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.00 each at 1K+ pcsreel
    of
    3500
    LM56BIMX/NOPB

    LM56BIMX

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide2482
    		$0.85 each at 1K+ pcsreel
    of
    2500
    LM56CIM/NOPB

    LM56CIM

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide975
    AVNET-EMWorldwide1103
    BRITESTONESouth Korea30
    DIGI-KEYWorldwide454
    FARNELLEurope and Asia130
    MOUSERWorldwide580
    NEWARKAmericas298
    RS COMPONENTSWorldwide5
    TAYLORAmericas2496
    		$0.69 each at 1K+ pcsrail
    of
    95
    LM56CIMM/NOPB

    LM56CIMM

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide4000
    DIGI-KEYWorldwide1099
    FARNELLEurope and Asia856
    MOUSERWorldwide982
    NEWARKAmericas853
    TAYLORAmericas2000
    		$0.76 each at 1K+ pcsreel
    of
    1000
    LM56CIMMX/NOPB

    LM56CIMMX

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.76 each at 1K+ pcsreel
    of
    3500
    LM56CIMX/NOPB

    LM56CIMX

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide2500
    DIGI-KEYWorldwide0
    MOUSERWorldwide2500
    TAYLORAmericas2500
    		$0.69 each at 1K+ pcsreel
    of
    2500

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM56.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM56 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM56BIM/NOPB

    LM56BIM
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    LM56
    BIM
    LM56BIMM/NOPB

    LM56BIMM
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    T02B
    LM56BIMMX/NOPB

    LM56BIMMX
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    T02B
    LM56BIMX/NOPB

    LM56BIMX
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    LM56
    BIM
    LM56CIM/NOPB

    LM56CIM
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    LM56
    CIM
    LM56CIMM/NOPB

    LM56CIMM
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    T02C
    LM56CIMMX/NOPB

    LM56CIMMX
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    T02C
    LM56CIMX/NOPB

    LM56CIMX
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    LM56
    CIM

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM56.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM56 is located at RoHS Status.

    CAD Symbols and Models
    Download LM56 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM56BIMLFAST10201400027850002790251354
    LM56BIMMLFAST10201400027850002790251354
    LM56BIMMXLFAST10201400027850002790251354
    LM56BIMXLFAST10201400027850002790251354
    LM56CIMLFAST10201400027850002790251354
    LM56CIMMLFAST10201400027850002790251354
    LM56CIMMXLFAST10201400027850002790251354
    LM56CIMXLFAST10201400027850002790251354

    Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

    For more information on Reliability Metrics, please click here.


    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM56.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM56 is located at RoHS Status.

    [Information as of 8-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation