National Semiconductor | High-performance Analog

 

 LM809   
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
    MCP809▲Different Pinout For LM809



    Typical Application
    click for larger image


    		Connection Diagram
    click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLM809 LP3470 MCP809
    Power on ResetYes Yes Yes
    WatchdogNo No No
    Power Fail InputNo No No
    Manual ResetNo No No
    Reset Timeout Period240 ms 1 ms 240 ms
    On/Off PinNo No No
    PowerGood / Error FlagYes Yes Yes
    Input Max Voltage6 Volt 5 Volt 5.5 Volt
    RegTypeSupervisor Supervisor Supervisor
    Temperature Min-40 deg C -20 deg C -40 deg C
    Temperature Max105 deg C 85 deg C 105 deg C

    Datasheets
    TitleSizeDateOther
    Language
    LM809 3-Pin Microprocessor Reset Circuits184
    Kbytes    		4-Sep-02日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM809M3-2.63/NOPB

    LM809M3-2.63

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1647
    AVNET-EMWorldwide6000
    DIGI-KEYWorldwide3337
    MOUSERWorldwide1859
    NEWARKAmericas1994
    TAYLORAmericas1647
    		$0.23 each at 1K+ pcsreel
    of
    1000
    LM809M3-2.93/NOPB

    LM809M3-2.93

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1399
    AVNET-EMWorldwide5000
    DIGI-KEYWorldwide4523
    MOUSERWorldwide1878
    NEWARKAmericas1650
    TAYLORAmericas13709
    		$0.23 each at 1K+ pcsreel
    of
    1000
    LM809M3-3.08/NOPB

    LM809M3-3.08

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1112
    AVNET-EMWorldwide21000
    BRITESTONESouth Korea2890
    DIGI-KEYWorldwide3315
    MOUSERWorldwide1684
    NEWARKAmericas1931
    RS COMPONENTSWorldwide1010
    TAYLORAmericas1112
    		$0.23 each at 1K+ pcsreel
    of
    1000
    LM809M3-4.38/NOPB


    RoHS Status

    SOT-23    		Full production
    Lead Time: 8 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.26 each at 1K+ pcsreel
    of
    1000
    LM809M3-4.63/NOPB

    LM809M3-4.63

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1800
    AVNET-EMWorldwide10000
    DIGI-KEYWorldwide5751
    MOUSERWorldwide2000
    NEWARKAmericas352
    RS COMPONENTSWorldwide835
    TAYLORAmericas2959
    		$0.23 each at 1K+ pcsreel
    of
    1000
    LM809M3X-2.63/NOPB

    LM809M3X-2.63

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide18000
    DIGI-KEYWorldwide0
    MOUSERWorldwide3000
    		$0.23 each at 1K+ pcsreel
    of
    3000
    LM809M3X-2.93/NOPB

    LM809M3X-2.93

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AITGAsia Pacific170
    AVNET-EMWorldwide3000
    DIGI-KEYWorldwide0
    MOUSERWorldwide3000
    		$0.23 each at 1K+ pcsreel
    of
    3000
    LM809M3X-3.08/NOPB

    LM809M3X-3.08

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide2390
    AVNET-EMWorldwide3000
    DIGI-KEYWorldwide0
    MOUSERWorldwide3000
    TAYLORAmericas2390
    		$0.23 each at 1K+ pcsreel
    of
    3000
    LM809M3X-4.63/NOPB

    LM809M3X-4.63

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide2992
    		$0.23 each at 1K+ pcsreel
    of
    3000

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM809LD-2.63
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LM809LDX-2.63
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LM809M3-2.45
    		NONE
    		NONE
    		30 Nov 2009
    LM809M3-4.00
    		NONE
    		NONE
    		30 Nov 2009
    LM809M3-4.38
    		NONE
    		NONE
    		30 Nov 2009
    LM809M3X-2.45
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM809M3X-4.00
    		LM809M3-4.00
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM809M3X-4.38
    		NONE
    		NONE
    		30 Nov 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 LM809.

    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 LM809 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM809M3-2.63/NOPB

    LM809M3-2.63
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		S3B
    XTT
    LM809M3-2.93/NOPB

    LM809M3-2.93
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		S4B
    XTT
    LM809M3-3.08/NOPB

    LM809M3-3.08
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		S5B
    XTT
    LM809M3-4.38/NOPB

    		10.34
    10.399
    		SOT-2331260DetailDownloadN/A
    		S7B
    XTT
    LM809M3-4.63/NOPB

    LM809M3-4.63
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		S8B
    XTT
    LM809M3X-2.63/NOPB

    LM809M3X-2.63
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		S3B
    XTT
    LM809M3X-2.93/NOPB

    LM809M3X-2.93
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		S4B
    XTT
    LM809M3X-3.08/NOPB

    LM809M3X-3.08
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		S5B
    XTT
    LM809M3X-4.63/NOPB

    LM809M3X-4.63
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		S8B
    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 LM809.

    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 LM809 is located at RoHS Status.

    CAD Symbols and Models
    Download LM809 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM809M3-2.63CS065247473430552700011568301341
    LM809M3-2.93CS065247473430552700011568301341
    LM809M3-3.08CS065247473430552700011568301341
    LM809M3-4.38CS065247473430552700011568301341
    LM809M3-4.63CS065247473430552700011568301341
    LM809M3X-2.63CS065247473430552700011568301341
    LM809M3X-2.93CS065247473430552700011568301341
    LM809M3X-3.08CS065247473430552700011568301341
    LM809M3X-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 LM809.

    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 LM809 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM809LD-2.63
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LM809LDX-2.63
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LM809M3-2.45
    		NONE
    		NONE
    		30 Nov 2009
    LM809M3-4.00
    		NONE
    		NONE
    		30 Nov 2009
    LM809M3-4.38
    		NONE
    		NONE
    		30 Nov 2009
    LM809M3X-2.45
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM809M3X-4.00
    		LM809M3-4.00
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM809M3X-4.38
    		NONE
    		NONE
    		30 Nov 2009

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