Part # LM3706 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM3706 LM3707 Microprocessor Supervisory Circuits with Low Line Output and Watchdog Timer


Part Details:

LM3706/LM3707 June 2002 LM3706/LM3707Microprocessor Supervisory Circuits with Low LineOutput and Watchdog Timer Microprocessor General Description n No external components required n RESET (LM3706) or RESET (LM3707) outputs The LM3706/LM3707 series of microprocessor supervisory n Precision supply voltage monitor circuits provide the maximum flexibility for monitoring powersupplies and battery controlled functions in systems without n Factory programmable Reset and Watchdog Timeout backup batteries. The LM3706/LM3707 series are available Delays in a 9-bump micro SMD package. n Available in micro SMD package for minimum footprint Built-in features include the following: n ±0.5% Reset threshold accuracy at room temperature n ±2% Reset threshold accuracy over temperature Reset: Reset is asserted during power-up, power-down, and extremes brownout conditions. RESET is guaranteed down to V of CC 1.0V. n Reset assertion down to 1V V (RESET option only) CC Supervisory n 28 µA V supply current Low Line Output: This early power failure warning indicator CC goes low when the supply voltage drops to a value which is2% higher than the reset threshold voltage. Applications Watchdog Timer: The WDI (Watchdog Input) monitors one of n Embedded Controllers and Processors the µP s output lines for activity. If no output transition occurs n Intelligent Instruments during the watchdog timeout period, reset is activated. n Automotive Systems n Critical µP Power Monitoring Features Circuits n Standard Reset Threshold voltage: 3.08V n Custom Reset Threshold voltages: For other voltages between 2.2V and 5.0V in 10mV increments, contactNational Semiconductor Corp. with Typical Application Low Line Output and Watchdog 20011603 Timer


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LM3706.pdf Datasheet