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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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HCC4541B Fiches technique(PDF) 2 Page - STMicroelectronics |
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HCC4541B Fiches technique(HTML) 2 Page - STMicroelectronics |
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2 / 11 page  RC Oscillator Circuit. a logic ” 1 ”, when it is a logic ” 0 ” and after a MAS- TER RESET is started, and Q output has been se- lected, the output goes up to a high state after 2 N-1 counts. It remains in that state till another MASTER RESET pulse is apply or the mode input is a logic ” 1 ”. The process starts by setting the AUTO RESET input (pin 5) to logic ” 0 ” and switching power on. If pin 5 is set to logic ” 1 ”, the AUTO RESET circuit is not enabled and counting cannot start till a positive MASTER RESET pulse is applied, returning to a low level. The AUTO RESET consumes a remarkable amount of power and should not be used if low- power operation is wanted. The frequency of the oscillator depends on the RC network. It can be calculated using the following for- mula: f = 1 2.3 RTC CTC where f is between 1 kHz and 100 kHz and RS ≥ 10 kΩ and ≈ 2RTC FUNCTIONAL DIAGRAM HCC/HCF4541B 2/11 |
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