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# (LM3702) or RESET (LM3703) outputs Precision supply voltage monitor Factory programmable Reset Timeout Delay 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 (RESET# option only) 28 µA VCC supply current Description The LM3702/LM3703 series of microprocessor supervisory circuits provide the maximum flexibility for monitoring power supplies and battery controlled functions in systems without backup batteries. The LM3702/LM3703 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. Low Line Output: This early power failure warning indicator goes low when the supply voltage drops to a value which is 2% higher than the reset threshold voltage. Applications Embedded Controllers and Processors Intelligent Instruments Automotive Systems Critical µP Power Monitoring

Also Recommended LM3709▲ Watchdog Timer To Allowing Monitoring Of Controller/processor Outputs

Typical Application click for larger image	Block Diagram click for larger image
Typical Performance click for larger image

Datasheets

Title		Size	Date	Other Language
	LM3703 Microprocessor Supervisory Circuits with Low Line Output and Manual Reset	222 Kbytes	19-Sep-03

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM3703XCBP-308	NONE	NATIONAL SEMICONDUCTOR	24 Jul 2009
LM3703XCBPX-308	NONE	NATIONAL SEMICONDUCTOR	24 Jul 2009