March LM Micropower Undervoltage Sensing Circuits with Programmable Output Delay General Description The LM series are micropower undervoltage sensing circuits that are ideal for use in battery powered micropro- cessor based systems, where extended battery life is a key requirement. A range of threshold voltages from 2. These devices feature a very low quiescent current of 0. The LM series features a highly accurate voltage reference, a comparator with precise thresholds and built-in hysterisis to prevent erratic reset operation, a time delayed output which can be programmed by the system designer, and guaranteed Reset operation down to 1. These devices are available in the space saving 5-Pin SOT23 surface mount package. For additional undervoltage thresholds and output options, please contact National Semiconductor.
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Semiconductor Company Overseas , home appliances, built-in clock functions are now taken for granted. Most contemporary clocks are quartz clock driven by a crystal oscillator and provide high-precision timekeeping. However, there is a , battery powered clock , when a home appliance is unplugged, or after a power outage. Setting the time , clock , that automatically sets its own time. These clocks receive standard radio time codes broadcast.
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