LM3712 - Microprocessor Supervisory Circuits with Separate Watchdog Timer Output, Power Fail Input and Manual Reset [Life-time buy]
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Features
•Standard Reset Threshold voltage: 3.08V
•Custom Reset Threshold voltages: For other voltages between 2.2V and 5.0V in 10mV increments, contact National Semiconductor Corp.
•No external components required
•Manual-Reset input
• ^RESET output
•Precision supply voltage monitor
•Factory programmable Reset and Watchdog Timeout Delays
•Separate Watchdog output
•Separate Power Fail comparator
•Available in micro SMD package for minimum footprint
•±0.5% Reset threshold accuracy at room temperature
•±2% Reset threshold accuracy over temperature extremes
•Reset assertion down to 1V VCC
•28 µA VCC supply current

General Description

The LM3712 series of microprocessor supervisory circuits provide the maximum flexibility for monitoring power supplies and battery controlled functions in systems without backup batteries. More...


Applications

•Embedded Controllers and Processors
•Intelligent Instruments
•Automotive Systems
•Critical µP Power Monitoring
  Typical Application
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Typical Performance

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  Block Diagram
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Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM3712 Microprocessor Supervisory Circuits with Separate Watchdog Timer Output, Power Fail Input and Manual Reset 311
Kbytes		 9-Jun-08 Download

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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
LM3712XQTP-308MICRO SMD9NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.20reel
of
250		XVR
I 41
8 weeksN/A
LM3712XQTPX-308MICRO SMD9NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.20reel
of
3000		XVR
I 41
8 weeksN/A

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM3712XQBP-308
NONE
NATIONAL SEMICONDUCTOR
24 Jul 2009
LM3712XQTP-308
LM3704XCMM-308
National Semiconductor
30 Nov 2009
LM3712XQTPX-308
LM3704XCMMX-308
National Semiconductor
30 Nov 2009

General Description

The LM3712 series of microprocessor supervisory circuits provide the maximum flexibility for monitoring power supplies and battery controlled functions in systems without backup batteries. The LM3712 series are available in a 9-bump micro SMD package.

Built-in features include the following:

Reset: Reset is asserted during power-up, power-down, and brownout conditions. ^RESET is guaranteed down to VCC of 1.0V.

Manual Reset Input: An input that asserts reset when pulled low.

Power-Fail Input: A 1.225V threshold detector for power fail warning, or to monitor a power supply other than VCC.

Watchdog Timer: The WDI (Watchdog Input) monitors one of the µP's output lines for activity. If no output transition occurs during the watchdog timeout period, the watchdog output ( ^WDO) pulls low.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM3712XQTP-308CS065238968520440200011249079519
LM3712XQTPX-308CS065238968520440200011249079519

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.


[Information as of 8-Nov-2009]