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LM3707XQBP-308 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM3707XQBP-308 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 11 page LM3706/LM3707 Microprocessor Supervisory Circuits with Low Line Output and Watchdog Timer General Description The LM3706/LM3707 series of microprocessor supervisory circuits provide the maximum flexibility for monitoring power supplies and battery controlled functions in systems without backup batteries. The LM3706/LM3707 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 V CC of 1.0V. 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. 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, reset is activated. Features n Standard Reset Threshold voltage: 3.08V n Custom Reset Threshold voltages: For other voltages between 2.2V and 5.0V in 10mV increments, contact National Semiconductor Corp. n No external components required n RESET (LM3706) or RESET (LM3707) outputs n Precision supply voltage monitor n Factory programmable Reset and Watchdog Timeout Delays n Available in micro SMD package for minimum footprint n ± 0.5% Reset threshold accuracy at room temperature n ± 2% Reset threshold accuracy over temperature extremes n Reset assertion down to 1V V CC (RESET option only) n 28 µA V CC supply current Applications n Embedded Controllers and Processors n Intelligent Instruments n Automotive Systems n Critical µP Power Monitoring Typical Application 20011603 June 2002 © 2002 National Semiconductor Corporation DS200116 www.national.com |
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