LMC555   
CMOS Timer 		Click link to Download

Features
•Less than 1 mW typical power dissipation at 5V supply
•3 MHz astable frequency capability
•1.5V supply operating voltage guaranteed
•Output fully compatible with TTL and CMOS logic at 5V supply
•Tested to -10 mA, +50 mA output current levels
•Reduced supply current spikes during output transitions
•Extremely low reset, trigger, and threshold currents
•Excellent temperature stability
•Pin-for-pin compatible with 555 series of timers
•Available in 8-pin MSOP Package and 8-Bump micro SMD package

Description

The LMC555 is a CMOS version of the industry standard 555 series general purpose timers. In addition to the standard package (SOIC, MSOP, and MDIP) the LMC555 is also available in a chip sized package (8 Bump micro SMD) using National's micro SMD package technology. The LMC555 offers the same capability of generating accurate time delays and frequencies as the LM555 but with much lower power dissipation and supply current spikes. When operated as a one-shot, the time delay is precisely controlled by a single external resistor and capacitor. In the stable mode the oscillation frequency and duty cycle are accurately set by two external resistors and one capacitor. The use of National Semiconductor's LMCMOS™ process extends both the frequency range and low supply capability.
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Connection Diagram
click for larger image


 

ParametersValues
Temperature Min -40 deg C
Temperature Max 85 deg C

Datasheets
TitleSizeDateOther
Language
LMC555 CMOS Timer767
Kbytes		25-May-06日本語
LMC555 Mil-Aero Datasheet MNLMC555-X160 Kbytes 


Featured Application Notes
TitleSizeDateOther
Language
AN-2021: Application Note 2021 LM3753/54 Evaluation Board1109
Kbytes		15-Dec-09 
AN-828: Application Note 828 Increasing the High Speed Torque of Bipolar Stepper Motors808
Kbytes		1-Oct-02日本語
AN-681: PC Mouse Implementation Using COP800525
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AN-460: Application Note 460 LM34/LM35 Precision Monolithic Temperature Sensors306
Kbytes		20-Sep-02日本語

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LMC555CM/NOPB
LMC555CM

RoHS Status



SOIC NARROW		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
ARROWWorldwide1693
AVNET-EMWorldwide90
DIGIKEYWorldwide576
FARNELLEurope and Asia6624
FUTUREWorldwide1100
NEWARKAmericas1303
RS COMPONENTSWorldwide976
TAYLORAmericas1624
$0.41 each at 1K+ pcsrail
of
95
LMC555CMM/NOPB
LMC555CMM

RoHS Status



MINI SOIC		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide1025
DIGIKEYWorldwide1844
FARNELLEurope and Asia1901
FUTUREWorldwide1100
NEWARKAmericas974
$0.47 each at 1K+ pcsreel
of
1000
LMC555CMMX/NOPB
LMC555CMMX

RoHS Status



MINI SOIC		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide3500
DIGIKEYWorldwide0
FUTUREWorldwide1100
$0.47 each at 1K+ pcsreel
of
3500
LMC555CMX/NOPB
LMC555CMX

RoHS Status



SOIC NARROW		Full production
Lead Time: 11 weeks

 
DistributorRegionQty
AITGAsia Pacific1001
ARROWWorldwide24500
AVNET-EMWorldwide15000
DIGIKEYWorldwide771
FUTUREWorldwide1100
KEIKONGAsia Pacific5000
NEWARKAmericas2541
TAYLORAmericas25000
TECHMOSAAsia Pacific87500
$0.41 each at 1K+ pcsreel
of
2500
LMC555CN/NOPB
LMC555CN

RoHS Status



MDIP		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
ARROWWorldwide804
DIGIKEYWorldwide4427
FARNELLEurope and Asia5994
FUTUREWorldwide1100
NEWARKAmericas921
RS COMPONENTSWorldwide434
TAYLORAmericas2275
$0.51 each at 1K+ pcsrail
of
40
LMC555CTP/NOPB

RoHS Status



MICRO SMD		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide4250
DIGIKEYWorldwide0
$0.47 each at 1K+ pcsreel
of
250
LMC555CTPX/NOPB

RoHS Status



MICRO SMD		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide3000
DIGIKEYWorldwide0
$0.47 each at 1K+ pcsreel
of
3000
LMC555 MDA

RoHS Status

Full production
Lead Time: N/A

 

Contact your distributor
CALLtray
of
N/A
LMC555 MD8

RoHS Status

Full production
Lead Time: N/A

 

Contact your distributor
CALLtray
of
N/A

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LMC555CBP
NONE
NATIONAL SEMICONDUCTOR
24 Jul 2009
LMC555CBPX
NONE
NATIONAL SEMICONDUCTOR
24 Jul 2009
LMC555H/883
NONE
NONE
08 Sep 1998
LMC555J/883
LM555J/883
NATIONAL SEMICONDUCTOR
03 Dec 2008

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

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

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

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHS
Status		CAD SymbolsModelsPackage
Marking
Format
LMC555CM/NOPB
LMC555CM
SOIC NARROW81
1		260
235		DetailN/AN/A
NSZXTT
LMC
555CM
LMC555CMM/NOPB
LMC555CMM
MINI SOIC81
1		260
260		DetailN/AN/A
ZXTT
ZC5
LMC555CMMX/NOPB
LMC555CMMX
MINI SOIC81
1		260
260		DetailN/AN/A
ZXTT
ZC5
LMC555CMX/NOPB
LMC555CMX
SOIC NARROW81
1		260
235		DetailN/AN/A
NSZXTT
LMC
555CM
LMC555CN/NOPB
LMC555CN
MDIP81
1		NA
NA		DetailN/AN/A
NSUZXYTTE#
LMC
555CN
LMC555CTP/NOPB
MICRO SMD81260DetailN/AN/A
XVF
I 02
LMC555CTPX/NOPB
MICRO SMD81260DetailN/AN/A
XVF
I 02
LMC555 MDA
Unpackaged DieN/A
-
LMC555 MD8
Unpackaged DieN/A
-

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

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

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

Design Tools
TitleSizeDate
LMC555CBP Micro SMD Qualification Package4172 Kbytes17-Apr-2000

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)
LMC555 MD8CMOS0197150026050002739175862
LMC555 MDAP2CMOS0497350143300002556689228
LMC555CMP2CMOS0497350143300002556689228
LMC555CMMP2CMOS0497350143300002556689228
LMC555CMMXP2CMOS0497350143300002556689228
LMC555CMXP2CMOS0497350143300002556689228
LMC555CNP2CMOS0497350143300002556689228
LMC555CTPP2CMOS0497350143300002556689228
LMC555CTPXP2CMOS0497350143300002556689228
LMC555J/883CMOS0197150026050002739175862

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/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

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

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LMC555CBP
NONE
NATIONAL SEMICONDUCTOR
24 Jul 2009
LMC555CBPX
NONE
NATIONAL SEMICONDUCTOR
24 Jul 2009
LMC555H/883
NONE
NONE
08 Sep 1998
LMC555J/883
LM555J/883
NATIONAL SEMICONDUCTOR
03 Dec 2008

[Information as of 9-Feb-2010]