National Semiconductor | High-performance Analog

 

 LM3704   
Microprocessor Supervisory Circuits with Power Fail Input, Low Line Output and Manual Reset 		Click link to Download

Features
  • Standard Reset Threshold voltage: 3.08V
  • Custom Reset Threshold voltages: For other voltages between 2.2V and 5.0V in 10mV increments, contact National Semiconductor Corp.
  • No external components required
  • Manual-Reset input
  • RESET# (LM3704) or RESET (LM3705) outputs
  • Precision supply voltage monitor
  • Factory programmable Reset Timeout Delay
  • Separate Power Fail comparator
  • Available in micro SMD package for minimum footprint
  • ±0.5% Reset threshold accuracy at room temperature
  • ±2% Reset threshold accuracy over temperature extremes
  • Reset assertion down to 1V VCC (RESET# option only)
  • 28 µA VCC supply current

    • Description

    The LM3704/LM3705 series of microprocessor supervisory circuits provide the maximum flexibility for monitoring power supplies and battery controlled functions in systems without backup batteries. The LM3704/LM3705 series are available in MSOP-10 and 9-bump micro SMD packages.

    Built-in features include the following:

    Reset: Reset is asserted during power-up, power-down, and brownout conditions. RESET# is guaranteed down to VCC of 1.0V.

    Manual Reset Input: An input that asserts reset when pulled low.

    Power-Fail Input: A 1.225V threshold detector for power fail warning, or to monitor a power supply other than VCC.

    Low Line Output: This early power failure warning indicator goes low when the supply voltage drops to a value which is 2% higher than the reset threshold voltage.


    Applications

  • Embedded Controllers and Processors
  • Intelligent Instruments
  • Automotive Systems
  • Critical µP Power Monitoring

    • Also Recommended
    LM3710▲Watchdog Timer To Allowing Monitoring Of Controller/processor Outputs



    Typical Application
    click for larger image


    		Block Diagram
    click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLM3704 LM3710
    Power on ResetYes Yes
    WatchdogNo Yes
    Power Fail InputYes Yes
    Manual ResetYes Yes
    Reset Timeout Period200 ms 200 ms
    On/Off PinYes Yes
    PowerGood / Error FlagYes Yes
    Input Min Voltage1 Volt 1 Volt
    Input Max Voltage5.5 Volt 5.5 Volt
    RegTypeSupervisor Supervisor
    Temperature Min-40 deg C -40 deg C
    Temperature Max85 deg C 85 deg C
    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM3704XCMM-308/NOPB


    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide2112
    FARNELLEurope and Asia103
    MOUSERWorldwide775
    RS COMPONENTSWorldwide3
    		$0.77 each at 1K+ pcsreel
    of
    1000
    LM3704YBMM-360/NOPB

    LM3704YBMM-360

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    RS COMPONENTSWorldwide1020
    		$0.77 each at 1K+ pcsreel
    of
    1000
    LM3704YCMM-232/NOPB


    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    RS COMPONENTSWorldwide50
    		$0.77 each at 1K+ pcsreel
    of
    1000
    LM3704YCMM-308/NOPB


    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide0
    FARNELLEurope and Asia231
    MOUSERWorldwide997
    RS COMPONENTSWorldwide60
    TAYLORAmericas1494
    		$0.77 each at 1K+ pcsreel
    of
    1000
    LM3704YCMMX-308/NOPB


    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.77 each at 1K+ pcsreel
    of
    3500

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM3704XBMM-232
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM3704XBMM-463
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM3704XCBP-308
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LM3704XCMM-263
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM3704XDMM-220
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM3704XDMM-232
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM3704XDMM-463
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM3704YAMM-308
    		NONE
    		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 LM3704.

    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 LM3704 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM3704XCMM-308/NOPB

    		29.841
    30.002
    		MINI SOIC101260DetailDownloadN/A
    		ZXTT
    R35B
    LM3704YBMM-360/NOPB

    LM3704YBMM-360
    		29.841
    30.002
    		MINI SOIC101
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    R49B
    LM3704YCMM-232/NOPB

    		29.841
    30.002
    		MINI SOIC101260DetailDownloadN/A
    		ZXTT
    R76B
    LM3704YCMM-308/NOPB

    		29.841
    30.002
    		MINI SOIC101260DetailDownloadN/A
    		ZXTT
    R48B
    LM3704YCMMX-308/NOPB

    		29.841
    30.002
    		MINI SOIC101260DetailDownloadN/A
    		ZXTT
    R48B

    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 LM3704.

    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 LM3704 is located at RoHS Status.

    CAD Symbols and Models
    Download LM3704 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM3704XCMM-308CS065247473430552700011568301341
    LM3704YBMM-360CS065247473430552700011568301341
    LM3704YCMM-232CS065247473430552700011568301341
    LM3704YCMM-308CS065247473430552700011568301341
    LM3704YCMMX-308CS065247473430552700011568301341

    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 LM3704.

    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 LM3704 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM3704XBMM-232
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM3704XBMM-463
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM3704XCBP-308
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LM3704XCMM-263
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM3704XDMM-220
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM3704XDMM-232
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM3704XDMM-463
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM3704YAMM-308
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

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