Features (TA = 25°C. Typical values unless otherwise specified). 5-Pin SOT23 package   Industrial operating range -40°C to +85°C Single or dual power supplies   Wide supply voltage range 5V to 30V Low supply current 300µA Low input bias current 7nA Low input offset current ±1nA Low input offset voltage ±2mV Response time 440ns (50mV overdrive) Input common mode voltage 0 to VS - 1.5V Description The LM397 is a single voltage comparator with an input common mode that includes ground. The LM397 is designed to operate from a single 5V to 30V power supply or a split power supply. Its low supply current is virtually independent of the magnitude of the supply voltage. The LM397 features an open collector output stage. This allows the connection of an external resistor at the output. The output can directly interface with TTL, CMOS and other logic levels, by tying the resistor to different voltage levels (level translator). The LM397 is available in space saving 5-Pin SOT23 package and pin compatible to TI's TL331, single differential comparator. Applications A/D converters Pulse, square wave generators Peak detector Industrial applications

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

Datasheets

Title		Size	Date	Other Language
	LM397 Single General Purpose Voltage Comparator	604 Kbytes	10-Aug-06

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM397MF/NOPB LM397MF RoHS Status	SOT-23	Full production Lead Time: 6 weeks	Distributor Region Qty AITG Asia Pacific 1001 ARROW Worldwide 2969 DIGI-KEY Worldwide 0 FARNELL Europe and Asia 8924 MOUSER Worldwide 505 NEWARK Americas 1180 RS COMPONENTS Worldwide 955 RSL MICRO Asia Pacific 3000 TAYLOR Americas 17808	$0.22 each at 1K+ pcs	reel of 1000
LM397MFX/NOPB LM397MFX RoHS Status	SOT-23	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 8125 AVNET-EM Worldwide 2900 DIGI-KEY Worldwide 0 MOUSER Worldwide 1173 TAYLOR Americas 8125	$0.22 each at 1K+ pcs	reel of 3000

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

Moisture Sensitivity Level Data for LM397.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM397 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM397MF/NOPB LM397MF	14.696 14.801	SOT-23	5	1 1	260 260	Detail	Download	N/A	C397 XTT
LM397MFX/NOPB LM397MFX	14.696 14.801	SOT-23	5	1 1	260 260	Detail	Download	N/A	C397 XTT

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

Moisture Sensitivity Level Data for LM397.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM397 is located at RoHS Status.

CAD Symbols and Models Download LM397 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM397MF	LB300	0	34371	0	0	4164500	1	1181688246
LM397MFX	LB300	0	34371	0	0	4164500	1	1181688246

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/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM397.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM397 is located at RoHS Status.