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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Datasheet

Title		Size	Date	Other Language
	LMC555 CMOS Timer	767 Kbytes	25-May-06	日本語
	LMC555 Mil-Aero Datasheet MNLMC555-X	160 Kbytes

Featured Application Notes

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	AN-460: Application Note 460 LM34/LM35 Precision Monolithic Temperature Sensors	306 Kbytes	20-Sep-02	日本語

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	AN-1155: Application Note 1155 A Simple Software I2C Routine for the COP8	82 Kbytes	15-May-04
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Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LMC555CM/NOPB LMC555CM RoHS	SOIC NARROW	Full production Lead Time: 8 weeks	Distributor Region Qty ARROW Worldwide 1474 AVNET-EM Worldwide 547 DIGIKEY Worldwide 2344 FARNELL Europe and Asia 6624 FUTURE Worldwide 1100 NEWARK Americas 1503 RS COMPONENTS Worldwide 976 TAYLOR Americas 1624	$0.41 each at 1K+ pcs	rail of 95
LMC555CMX/NOPB LMC555CMX RoHS	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty AITG Asia Pacific 1001 ARROW Worldwide 2500 DIGIKEY Worldwide 2168 FUTURE Worldwide 1100 KEIKONG Asia Pacific 5000 NEWARK Americas 2677 TAYLOR Americas 25000 TECHMOSA Asia Pacific 87500	$0.41 each at 1K+ pcs	reel of 2500
LMC555CMM/NOPB LMC555CMM RoHS	MINI SOIC	Full production Lead Time: 8 weeks	Distributor Region Qty ARROW Worldwide 412 AVNET-EM Worldwide 1000 DIGIKEY Worldwide 2442 FARNELL Europe and Asia 1901 FUTURE Worldwide 1100 NEWARK Americas 1168	$0.47 each at 1K+ pcs	reel of 1000
LMC555CMMX/NOPB LMC555CMMX RoHS	MINI SOIC	Full production Lead Time: 8 weeks	Distributor Region Qty DIGIKEY Worldwide 0 FUTURE Worldwide 1100	$0.47 each at 1K+ pcs	reel of 3500
LMC555CN/NOPB LMC555CN RoHS	MDIP	Full production Lead Time: 12 weeks	Distributor Region Qty ARROW Worldwide 889 AVNET-EM Worldwide 986 DIGIKEY Worldwide 5193 FARNELL Europe and Asia 5994 FUTURE Worldwide 1100 RS COMPONENTS Worldwide 434 TAYLOR Americas 2275	$0.51 each at 1K+ pcs	rail of 40
LMC555CTP/NOPB RoHS		Full production Lead Time: 8 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$0.47 each at 1K+ pcs	reel of 250
LMC555CTPX/NOPB RoHS		Full production Lead Time: 8 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$0.47 each at 1K+ pcs	reel of 3000
LMC555 MDA RoHS		Full production Lead Time: N/A	Contact your distributor	CALL	tray of N/A
LMC555 MD8 RoHS		Full production Lead Time: N/A	Contact your distributor	CALL	tray of N/A

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last 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

Design Tools

Title	Size	Date
LMC555CBP Micro SMD Qualification Package	4172 Kbytes	17-Apr-2000

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMC555 MD8	CMOS	0	19715	0	0	2605000	2	739175862
LMC555 MDA	P2CMOS	0	49735	0	1	4330000	2	556689228
LMC555CM	P2CMOS	0	49735	0	1	4330000	2	556689228
LMC555CMM	P2CMOS	0	49735	0	1	4330000	2	556689228
LMC555CMMX	P2CMOS	0	49735	0	1	4330000	2	556689228
LMC555CMX	P2CMOS	0	49735	0	1	4330000	2	556689228
LMC555CN	P2CMOS	0	49735	0	1	4330000	2	556689228
LMC555CTP	P2CMOS	0	49735	0	1	4330000	2	556689228
LMC555CTPX	P2CMOS	0	49735	0	1	4330000	2	556689228
LMC555J/883	CMOS	0	19715	0	0	2605000	2	739175862

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
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