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???
06/01/06 04:17
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 		 #117455 - That's not true, Erik!
Responding to: ???'s previous message
Erik said:
If your supervisor fires YOU HAVE A DESIGN ERROR or a component gone bad.

That's not true, Erik!
You cannot design a circuit to be immune against noise, if the noise isn't limited by any physical mechanismn. Or by other words: There's no limit of energy, when an ESD event hits your circuit! There's no limit of energy and number of occurences, when a surge or burst hits the mains terminals! Or think about mains voltage dips, interruptions and fluctuations, which are totally unpredictable. Only a few examples here. So, even with the most sophisticated filtering you cannot define any limit for noise and interference contaminating your circuit.

Even the CE standards mention this: An application is allowed to show a short break of normal operation under certain conditions, but must commence normal operation again by itself. So, a supervisor chip firing from time to time is totally allowed and is no indication for a faulty design!

Kai

List of 33 messages in thread
TopicAuthorDate
Favorite reset/supervisor for '51?            01/01/70 00:00      
   (TL)7705            01/01/70 00:00      
      correction            01/01/70 00:00      
         Re: correction            01/01/70 00:00      
   MAX813L or SP813L            01/01/70 00:00      
   MAX1232 plus 4k7 pull-up            01/01/70 00:00      
      pullup?            01/01/70 00:00      
         Exactly!            01/01/70 00:00      
   LM809            01/01/70 00:00      
      809?            01/01/70 00:00      
         LM809 - LM810            01/01/70 00:00      
   using various, but maybe of interest            01/01/70 00:00      
      choose one            01/01/70 00:00      
         The internal supervisor (NEVER the Intel            01/01/70 00:00      
         Noise immunity            01/01/70 00:00      
            how to quantify noise immunity            01/01/70 00:00      
               you do not need to            01/01/70 00:00      
                  proper way and bulletproof            01/01/70 00:00      
                     who cares ...            01/01/70 00:00      
                        don't play with words...            01/01/70 00:00      
                           never            01/01/70 00:00      
                              there's no point arguing...            01/01/70 00:00      
                                 it is about the supervisor            01/01/70 00:00      
                              That's not true, Erik!            01/01/70 00:00      
                                 I stick to it.            01/01/70 00:00      
                                    I didn't expect anything else...            01/01/70 00:00      
                                       way too often the highlighted is not the            01/01/70 00:00      
                                          the wolves            01/01/70 00:00      
                                          More measures than your boss like...            01/01/70 00:00      
                                             agree            01/01/70 00:00      
               'How using a watchdog for my watchdog?'            01/01/70 00:00      
   ZSH560            01/01/70 00:00      
      ZSH->ZSM            01/01/70 00:00      

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