Features • 0.0625°C temperature resolution. • Shutdown mode conserves power between temperature reading • SPI and MICROWIRE Bus interface • 5-Bump micro SMD package saves space Description The LM74 is a temperature sensor, Delta-Sigma analog-to-digital converter with an SPI and MICROWIRE compatible interface. The host can query the LM74 at any time to read temperature. A shutdown mode decreases power consumption to less than 10 µA. This mode is useful in systems where low average power consumption is critical. The LM74 has 12-bit plus sign temperature resolution (0.0625°C per LSB) while operating over a temperature range of -55°C to +150°C. The LM74's 3.0V to 5.5V supply voltage range, low supply current and simple SPI interface make it ideal for a wide range of applications. These include thermal management and protection applications in hard disk drives, printers, electronic test equipment, and office electronics. The LM74 is available in the SO-8 package as well as an 5-Bump micro SMD package. Key Specification Supply Voltage   3.0V or 2.65V to 5.5V Supply Current operating 265µA (typ)     520µA (max)   shutdown 3µA (typ) Temperature Accuracy -10°C to 65°C ±1.25°C(max)   -25°C to 110°C ±2.1°C(max)   -55°C to 125°C ±3°C(max) Applications • System Thermal Management • Personal Computers • Disk Drives • Office Electronics • Electronic Test Equipment

Also Recommended LM70▲ In LLP Package LM74A▲ The LM74 In Die Form MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

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Datasheet

Title		Size	Date	Other Language
	LM74 SPI/MICROWIRE™ 12-Bit Plus Sign Temperature Sensor	710 Kbytes	10-May-05	日本語

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	AN-1256: Application Note 1256 Tiny Temperature Sensors for Portable Systems	66 Kbytes	1-Oct-02

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Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM74CIM-3/NOPB LM74CIM-3 RoHS	SOIC NARROW	Full production Lead Time: 16 weeks	Distributor Region Qty ARROW Worldwide 1424 AVNET-EM Worldwide 4635 DIGIKEY Worldwide 0 FUTURE Worldwide 440 NEWARK Americas 17 RS COMPONENTS Worldwide 165 TAYLOR Americas 380	$0.69 each at 1K+ pcs	rail of 95
LM74CIM-5/NOPB LM74CIM-5 RoHS	SOIC NARROW	Full production Lead Time: 16 weeks	Distributor Region Qty ARROW Worldwide 887 AVNET-EM Worldwide 340 DIGIKEY Worldwide 0 FUTURE Worldwide 1100 KEIKONG Asia Pacific 46 NEWARK Americas 119 RS COMPONENTS Worldwide 182 TAYLOR Americas 330	$0.69 each at 1K+ pcs	rail of 95
LM74CIMX-3/NOPB LM74CIMX-3 RoHS	SOIC NARROW	Full production Lead Time: 12 weeks	Distributor Region Qty ARROW Worldwide 5000 DIGIKEY Worldwide 0 FUTURE Worldwide 1100	$0.69 each at 1K+ pcs	reel of 2500
LM74CIMX-5/NOPB LM74CIMX-5 RoHS	SOIC NARROW	Full production Lead Time: 8 weeks	Distributor Region Qty AVNET-EM Worldwide 7500 DIGIKEY Worldwide 0	$0.69 each at 1K+ pcs	reel of 2500

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM74A-3 MDA	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM74CIBP-3	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM74CIBP-5	NONE	NATIONAL SEMICONDUCTOR	24 Jul 2009
LM74CIBPX-3	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM74CIBPX-5	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM74CITP-5	LM74CIM-5	National Semiconductor	30 Nov 2009
LM74CITPX-5	LM74CIMX-5	National Semiconductor	30 Nov 2009

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM74CIM-3	CS065	2	38968	52	0	4402000	1	1249079519
LM74CIM-5	CS065	2	38968	52	0	4402000	1	1249079519
LM74CIMX-3	CS065	2	38968	52	0	4402000	1	1249079519
LM74CIMX-5	CS065	2	38968	52	0	4402000	1	1249079519

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.

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Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM74A-3 MDA	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM74CIBP-3	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM74CIBP-5	NONE	NATIONAL SEMICONDUCTOR	24 Jul 2009
LM74CIBPX-3	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM74CIBPX-5	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM74CITP-5	LM74CIM-5	National Semiconductor	30 Nov 2009
LM74CITPX-5	LM74CIMX-5	National Semiconductor	30 Nov 2009