LM555 - Timer

Datasheet Packaging Samples & Pricing Reliability Application Notes Knowledge Base

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

General Description

The LM555 is a highly stable device for generating accurate time delays or oscillation. More...


Applications

•Precision timing
•Pulse generation
•Sequential timing
•Time delay generation
•Pulse width modulation
•Pulse position modulation
•Linear ramp generator
  Typical Application
*click for larger image


Parametric Table     expand
Parametric Table    collapse
Temperature Min 0 deg C
Temperature Max 70 deg C
Temperature Min 0 deg C
Temperature Max 70 deg C
View Using Catalog


Typical Performance

click for larger image


  Also Recommended
LMC555CMOS Version

Additional Resources

Application Notes (see below)


Connection Diagram

click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to View Online Click link below to Download Click link below to Receive via Email
LM555 Timer 825 Kbytes 12-Jul-06 View Online Download Receive via Email
LM555JAN Timer 825 Kbytes 26-Jul-06 View Online Download Receive via Email
LM555QML Timer 823 Kbytes 26-Jul-06 View Online Download Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM555CMSOIC NARROW8STD
NOPB		1
1		235
260		RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$0.36rail
of
95		NSZXTT
LM
555CM
8 weeks2000
LM555CMXSOIC NARROW8STD
NOPB		1
1		235
260		RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.36reel
of
2500		NSZXTT
LM
555CM
8 weeks7500
LM555CMMMINI SOIC8STD
NOPB		1
1		260
260		RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$0.29reel
of
1000		ZXTT
Z55
8 weeks2500
LM555CMMXMINI SOIC8NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.29reel
of
3500		ZXTT
Z55
8 weeks10000
LM555CNMDIP8STD
NOPB		1
1		NA
NA		RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.39rail
of
40		NSUZXYTT
LM
555CN
8 weeks2500
LM555H/883TO-998STD1NARoHS N/A Full productionN/A
 
Buy Now 		50+$12.60tray
of
20		-
8 weeks500
LM555J/883CERDIP8STD1NARoHS N/A Full productionN/A
 
Buy Now 		50+$9.60rail
of
40		NSZSSXXYYA
LM555J/
883 Q
6 weeks500
LM555H-MLSTO-998RoHS N/A Lifetime buyN/A
  CALLtray
of
N/A		NSZSSXXYYA
LM555H-MLS
N/AN/A
LM555 MDCUnpackaged DieLifetime buyN/A
  CALLtray
of
N/A		-
N/A15000
LM555 MWCWaferLifetime buyN/A
  CALLwafer jar
of
N/A		-
N/AN/A
LM555 MD8Unpackaged DieFull productionN/A
  CALLtray
of
N/A		-
N/AN/A

Obsolete Parts

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM555CH
LM555N/M
NATIONAL SEMICONDUCTOR
01/15/96
LM555CJ
NONE
NONE
09/08/98
LM555H-MLS
LM555H/883
NSC
12/03/2008
LM555H-S
NONE
NONE
04/04/95
LM555J
NONE
NONE
09/08/98
LM555J-MLS
JL555SPA
NATIONAL SEMICONDUCTOR
09/08/98

General 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.

Reliability Metrics

Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LM555CMSLM0395460028575002810823427
LM555CMMSLM0395460028575002810823427
LM555CMMXSLM0395460028575002810823427
LM555CMXSLM0395460028575002810823427
LM555CNSLM0395460028575002810823427

For more information on Reliability Metrics, please click here.


Application Notes

TitleSize in Kbytes Date Click link below to View Online Click link below to Download Click link below to Receive via Email
AN-694: Application Note 694 A DMOS 3A, 55V, H-Bridge: The LMD18200 408 Kbytes 26-Sep-02 View Online Download Receive via Email
AN-694 (Japanese): Application Note 694 A DMOS 3A, 55V, H-Bridge: The LMD18200
 400 Kbytes   View Online Download Receive via Email

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[Information as of 29-Aug-2008]