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 MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application *click for larger image	Connection Diagram click for larger image
Typical Performance click for larger image

Datasheet

Title		Size	Date	Other Language
	LM555 Timer	825 Kbytes	12-Jul-06

Featured Application Notes

Title		Size	Date	Other Language
	AN-694: Application Note 694 A DMOS 3A, 55V, H-Bridge: The LMD18200	408 Kbytes	26-Sep-02	日本語

More Application Notes

Title		Size	Date	Other Language
	AN-1566: Application Note 1566 Techniques for Thermal Analysis of Switching Power Supply Designs	370 Kbytes	7-Feb-07	日本語 中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM555CM/NOPB LM555CM RoHS	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1475 AVNET-EM Worldwide 329 DIGIKEY Worldwide 1693 FUTURE Worldwide 1100 KEIKONG Asia Pacific 1520 NEWARK Americas 824 RS COMPONENTS Worldwide 320 TAYLOR Americas 2573	$0.39 each at 1K+ pcs	rail of 95
LM555CMX/NOPB LM555CMX RoHS	SOIC NARROW	Full production Lead Time: 8 weeks	Distributor Region Qty ARROW Worldwide 1800 AVNET-EM Worldwide 2500 BRITESTONE South Korea 275 DIGIKEY Worldwide 1673 FUTURE Worldwide 1100 NEWARK Americas 1169	$0.39 each at 1K+ pcs	reel of 2500
LM555CMM/NOPB LM555CMM RoHS	MINI SOIC	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 3320 FUTURE Worldwide 139 NEWARK Americas 1274 RS COMPONENTS Worldwide 520	$0.38 each at 1K+ pcs	reel of 1000
LM555CMMX/NOPB RoHS	MINI SOIC	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$0.38 each at 1K+ pcs	reel of 3500
LM555CN/NOPB LM555CN RoHS	MDIP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 2765 DIGIKEY Worldwide 106 FARNELL Europe and Asia 6053 FUTURE Worldwide 1100 KEIKONG Asia Pacific 26000 NEWARK Americas 1188 RS COMPONENTS Worldwide 1310 TAYLOR Americas 2384	$0.44 each at 1K+ pcs	rail of 40
LM555 MD8 RoHS		Lifetime buy Lead Time: 6 weeks	Contact your distributor	CALL	tray of N/A
LM555H/883 RoHS	TO-99	Full production Lead Time: 18 weeks	Contact your distributor	$15.10 each at 50+ pcs	tray of 20
LM555J/883 RoHS	CERDIP	Full production Lead Time: 15 weeks	Contact your distributor	$9.60 each at 50+ pcs	rail of 40

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last 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

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM555CM	SLM	0	44046	0	0	3532500	1	1002356520
LM555CMM	SLM	0	44046	0	0	3532500	1	1002356520
LM555CMMX	SLM	0	44046	0	0	3532500	1	1002356520
LM555CMX	SLM	0	44046	0	0	3532500	1	1002356520
LM555CN	SLM	0	44046	0	0	3532500	1	1002356520

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.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last 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