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???
12/13/06 15:51
Modified:
  12/13/06 15:54
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 		 #129417 - read the datasheet
Responding to: ???'s previous message
Also is 9v battery to 3.3v regulator to much for 3.3v regulator?
I can not imagine a 3V3 regulator that can not handle 9V in, but the issue is heat. So 6*whatever current your board uses is the wattage the chip must be able to handle.

Erik

first try http://www.digikey.com/ and enter linear regulator, via another click you get to a parametric search. If that is not succesful (it should be) then go for the potential sources: LT, national, AD, ON, Maxim and more. most will have a 'selection table' e.g. http://para.maxim-ic.com/cache/en/search/4653.html that allow you to specify what you need. The chip shown in the photo is a DIL8 or DIP8 (I have seen either used).


List of 51 messages in thread
TopicAuthorDate
My two cents and then sum            01/01/70 00:00      
   RC reset - asking for trouble!            01/01/70 00:00      
   be careful now ... here be dragons            01/01/70 00:00      
   May we...            01/01/70 00:00      
      yes            01/01/70 00:00      
   Why you should use a proper reset chip            01/01/70 00:00      
      what about bidirectional reset?            01/01/70 00:00      
         I use only external watchdog / brown-out detection            01/01/70 00:00      
            I doubt this.....            01/01/70 00:00      
               If it really, really has to work..            01/01/70 00:00      
            there isn't much you can do about internal reset            01/01/70 00:00      
               which chip is that?            01/01/70 00:00      
                  DS89C4x0, among, I suspect, others            01/01/70 00:00      
               Micro isn't allowed to emit reset signal            01/01/70 00:00      
         easy as apple pie            01/01/70 00:00      
            Only because it worked for you does not mean...            01/01/70 00:00      
               that does not matter            01/01/70 00:00      
                  Of course, it does            01/01/70 00:00      
   all posts in this thread are incomplete            01/01/70 00:00      
      Then, please read again what I wrote            01/01/70 00:00      
         OK, you had that too            01/01/70 00:00      
         Thanks to all who give comments            01/01/70 00:00      
            What kind of supply regulation?            01/01/70 00:00      
               Battery            01/01/70 00:00      
                  Hhm, I'm confused now...            01/01/70 00:00      
                     Right            01/01/70 00:00      
                        if you specified            01/01/70 00:00      
                           I guess a LM78L05 was originally built-in            01/01/70 00:00      
                        Then, the DS275 won't work either            01/01/70 00:00      
            MAX6383            01/01/70 00:00      
   Maybe here            01/01/70 00:00      
      I did look their first            01/01/70 00:00      
         that is not what you asked            01/01/70 00:00      
            Sorry Erik            01/01/70 00:00      
               read the datasheet            01/01/70 00:00      
                  What photo?            01/01/70 00:00      
                     OOPS            01/01/70 00:00      
                        Always...            01/01/70 00:00      
                           I would like change ds275            01/01/70 00:00      
                              You can, but..            01/01/70 00:00      
                                 Ok, try this:            01/01/70 00:00      
                                    to Kai            01/01/70 00:00      
                                       Only to avoid damage caused by inrush currents            01/01/70 00:00      
                                          Ah, thanks            01/01/70 00:00      
                                          When you say "damage"            01/01/70 00:00      
                        Sorry Erik            01/01/70 00:00      
                           Would it be just too much of an effort for you            01/01/70 00:00      
                              You are right Erik            01/01/70 00:00      
                                 I do, ONCE            01/01/70 00:00      
                                    Erik I said was sorry two times            01/01/70 00:00      
                                       i am not asking for 'sorry'            01/01/70 00:00      

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