National Semiconductor | High-performance Analog

 

 LM810   
3-Pin Microprocessor Reset Circuits 		Click link to Download

Features
  • Precise monitoring of 3V, 3.3V, and 5V supply voltages
  • Superior upgrade to MAX809/810
  • Fully specified over temperature
  • 140ms min. Power-On Reset pulse width, 240ms typical Active-low RESET# Output (LM809) Active-high RESET Output (LM810)
  • Guaranteed RESET Output valid for VCC>=1V
  • Low Supply Current, 15µA typ.
  • Power supply transient immunity

    • Description

    The LM809/810 microprocessor supervisory circuits can be used to monitor the power supplies in microprocessor and digital systems. They provide a reset to the microprocessor during power-up, power-down and brown-out conditions.

    The function of the LM809/810 is to monitor the VCC supply voltage, and assert a reset signal whenever this voltage declines below the factory-programmed reset threshold. The reset signal remains asserted for 240ms after VCC rises above the threshold. The LM809 has an active-low RESET# output, while the LM810 has an active-high RESET output.

    Seven standard reset voltage options are available, suitable for monitoring 5V, 3.3V, and 3V supply voltages.

    With a low supply current of only 15µA, the LM809/810 are ideal for use in portable equipment. The LM809/LM810 are available in the 3-pin SOT23 package and in the 6-Lead LLP package.


    Applications

  • Microprocessor Systems
  • Computers
  • Controllers
  • Intelligent Instruments
  • Portable/Battery-Powered Equipment
  • Automotive

    • Also Recommended
    LP3470▲Adj Reset Timeout, Open-Drain Output, Precision
    MCP810▲Different Pin Out



    Typical Application
    click for larger image


    		Connection Diagram
    click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLM810 LP3470 MCP810
    Power on ResetYes Yes
    WatchdogNo No
    Power Fail InputNo No
    Manual ResetNo No
    Reset Timeout Period240 ms 1 ms
    On/Off PinNo No
    PowerGood / Error FlagYes Yes
    Input Max Voltage6 Volt 5 Volt
    RegTypeSupervisor Supervisor
    Temperature Min-40 deg C -20 deg C
    Temperature Max105 deg C 85 deg C

    Datasheets
    TitleSizeDateOther
    Language
    LM810 3-Pin Microprocessor Reset Circuits184
    Kbytes    		4-Sep-02日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM810M3-4.63/NOPB

    LM810M3-4.63

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide2000
    DIGI-KEYWorldwide0
    NEWARKAmericas2217
    RS COMPONENTSWorldwide490
    TAYLORAmericas1000
    		$0.23 each at 1K+ pcsreel
    of
    1000
    LM810M3X-4.63/NOPB


    RoHS Status

    SOT-23    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.26 each at 1K+ pcsreel
    of
    3000

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM810M3-2.63
    		LM809M3-2.63
    		National Semiconductor
    		30 Nov 2009
    LM810M3-2.93
    		LM809M3-2.93
    		National Semiconductor
    		30 Nov 2009
    LM810M3-3.08
    		LM809M3-3.08
    		National Semiconductor
    		30 Nov 2009
    LM810M3-4.00
    		NONE
    		NONE
    		30 Nov 2009
    LM810M3-4.38
    		NONE
    		NONE
    		30 Nov 2009
    LM810M3X-2.63
    		LM809M3X-2.63
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM810M3X-2.93
    		LM809M3X-2.93
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM810M3X-3.08
    		LM809M3X-3.08
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM810M3X-4.00
    		NONE
    		NONE
    		30 Nov 2009
    LM810M3X-4.38
    		LM809M3X-4.38
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM810M3X-4.63
    		LM810M3-4.63
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

    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 LM810.

    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 LM810 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM810M3-4.63/NOPB

    LM810M3-4.63
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailN/AN/A
    		SEB
    XTT
    LM810M3X-4.63/NOPB

    		10.34
    10.399
    		SOT-2331260DetailN/AN/A
    		SEB
    XTT

    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 LM810.

    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 LM810 is located at RoHS Status.

    CAD Symbols and Models
    N/A
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM810M3-4.63CS065247473430552700011568301341
    LM810M3X-4.63CS065247473430552700011568301341

    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 LM810.

    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 LM810 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM810M3-2.63
    		LM809M3-2.63
    		National Semiconductor
    		30 Nov 2009
    LM810M3-2.93
    		LM809M3-2.93
    		National Semiconductor
    		30 Nov 2009
    LM810M3-3.08
    		LM809M3-3.08
    		National Semiconductor
    		30 Nov 2009
    LM810M3-4.00
    		NONE
    		NONE
    		30 Nov 2009
    LM810M3-4.38
    		NONE
    		NONE
    		30 Nov 2009
    LM810M3X-2.63
    		LM809M3X-2.63
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM810M3X-2.93
    		LM809M3X-2.93
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM810M3X-3.08
    		LM809M3X-3.08
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM810M3X-4.00
    		NONE
    		NONE
    		30 Nov 2009
    LM810M3X-4.38
    		LM809M3X-4.38
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM810M3X-4.63
    		LM810M3-4.63
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

    [Information as of 9-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation