National Semiconductor | High-performance Analog

 

 LM555   
Timer 		Click link to Download

Features
  • Direct replacement for SE555/NE555
  • Timing from microseconds through hours
  • Operates in both astable and monostable modes
  • Adjustable duty cycle
  • Output can source or sink 200 mA
  • Output and supply TTL compatible
  • Temperature stability better than 0.005% per °C
  • Normally on and normally off output
  • Available in 8-pin MSOP package

    • Description

    The LM555 is a highly stable device for generating accurate time delays or oscillation. Additional terminals are provided for triggering or resetting if desired. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For astable operation as an oscillator, the free running frequency and duty cycle are accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output circuit can source or sink up to 200mA or drive TTL circuits.


    Applications

  • Precision timing
  • Pulse generation
  • Sequential timing
  • Time delay generation
  • Pulse width modulation
  • Pulse position modulation
  • Linear ramp generator

    • Also Recommended
    LMC555▲CMOS Version



    Typical Application
    *click for larger image


    		Connection Diagram
    click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLM555 LMC555
    Temperature Min0 deg C -40 deg C
    Temperature Max70 deg C 85 deg C

    Datasheets
    TitleSizeDateOther
    Language
    LM555 Timer825
    Kbytes    		12-Jul-06   


    Application Notes
    TitleSizeDateOther
    Language
    AN-694: Application Note 694 A DMOS 3A, 55V H-Bridge the LMD18200408
    Kbytes    		26-Sep-02日本語

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM555CM/NOPB

    LM555CM

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1528
    AVNET-EMWorldwide2705
    DIGI-KEYWorldwide1656
    FARNELLEurope and Asia2942
    MOUSERWorldwide1060
    NEWARKAmericas1077
    RS COMPONENTSWorldwide320
    TAYLORAmericas2028
    		$0.36 each at 1K+ pcsrail
    of
    95
    LM555CMM/NOPB

    LM555CMM

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide3940
    DIGI-KEYWorldwide4333
    FARNELLEurope and Asia158
    MOUSERWorldwide1379
    NEWARKAmericas1555
    RS COMPONENTSWorldwide520
    TAYLORAmericas5760
    		$0.34 each at 1K+ pcsreel
    of
    1000
    LM555CMMX/NOPB


    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide7000
    DIGI-KEYWorldwide0
    		$0.34 each at 1K+ pcsreel
    of
    3500
    LM555CMX/NOPB

    LM555CMX

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide17780
    AVNET-EMWorldwide4877
    BRITESTONESouth Korea275
    DIGI-KEYWorldwide5181
    FARNELLEurope and Asia1796
    MOUSERWorldwide1188
    NEWARKAmericas1796
    TAYLORAmericas17780
    		$0.36 each at 1K+ pcsreel
    of
    2500
    LM555CN/NOPB

    LM555CN

    RoHS Status

    MDIP    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    ARROWWorldwide363
    AVNET-EMWorldwide822
    DIGI-KEYWorldwide4649
    FARNELLEurope and Asia7899
    MOUSERWorldwide920
    NEWARKAmericas773
    RS COMPONENTSWorldwide1310
    TAYLORAmericas1961
    		$0.40 each at 1K+ pcsrail
    of
    40
    LM555-MWC

    RoHS Status    		Full production
    Lead Time: 6 weeks

     

    Contact your distributor
    		CALLwafer jar
    of
    N/A

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM555CJ
    		NONE
    		NONE
    		08 Sep 1998
    LM555H-MLS
    		LM555H/883
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LM555J
    		NONE
    		NONE
    		08 Sep 1998
    LM555J-MLS
    		NONE
    		NONE
    		08 Sep 1998

    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 LM555.

    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 LM555 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM555CM/NOPB

    LM555CM
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    LM
    555CM
    LM555CMM/NOPB

    LM555CMM
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    Z55
    LM555CMMX/NOPB

    		29.851
    		MINI SOIC81260DetailDownloadN/A
    		ZXTT
    Z55
    LM555CMX/NOPB

    LM555CMX
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    LM
    555CM
    LM555CN/NOPB

    LM555CN
    		508.252
    510.002
    		MDIP81
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYTTE#
    LM
    555CN
    LM555-MWC
    		WaferN/A
    		-

    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 LM555.

    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 LM555 is located at RoHS Status.

    CAD Symbols and Models
    Download LM555 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM555-MWCSLM04404600353250011002356520
    LM555CMSLM04404600353250011002356520
    LM555CMMSLM04404600353250011002356520
    LM555CMMXSLM04404600353250011002356520
    LM555CMXSLM04404600353250011002356520
    LM555CNSLM04404600353250011002356520

    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 LM555.

    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 LM555 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM555CJ
    		NONE
    		NONE
    		08 Sep 1998
    LM555H-MLS
    		LM555H/883
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LM555J
    		NONE
    		NONE
    		08 Sep 1998
    LM555J-MLS
    		NONE
    		NONE
    		08 Sep 1998

    [Information as of 3-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation