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???
06/01/06 03:46
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 		 #117454 - 'How using a watchdog for my watchdog?'
Responding to: ???'s previous message
Jan said:
It is hard to properly quantify noise immunity of both reset/supervisor, and mcu, methink.

First, please don't start a new thread. Now, I cannot refer to posts made in the other thread...
Noise immunity is not only meant refering to the unwanted triggering due to noise on Vcc or ground, but also how the reset chip behaves, when noise arrives the chip! You remember the thread "How using a watchdog for my watchdog?"? This thread discussed the strange fact, that some reset chips tend to hang, when they are hit by certain kinds of noise. And just here the MAX1232 shows superior performance when compared to DS1232, ADM1232, etc.

Noise immunity of reset chip is only very seldom specified in datasheet! And I think this is done intentionally by the manufacturers: I don't know how MAXIM does it, but their chip are better than the DS1232 for instance, and I would always use the MAXIM's part, just from experience.

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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