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???
04/27/09 12:51
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 		 #164862 - IO expansion
Responding to: ???'s previous message
http://www.sixca.com/micro/mcs51/

Follow the link for IO expansion, just use a 10K pullup for '165 inputs. For both '595 and '165 ground Enable output (595) and Clock inhibit('165).

List of 55 messages in thread
TopicAuthorDate
ULN2803 with shift register            01/01/70 00:00      
   TPIC            01/01/70 00:00      
   serial low-side drivers            01/01/70 00:00      
      Turning off ULN2803 Output            01/01/70 00:00      
         IOL for one pin is commonly 10mA            01/01/70 00:00      
            Blue Smoke?            01/01/70 00:00      
               no. No, NO            01/01/70 00:00      
               accidental double, ignore            01/01/70 00:00      
            10 mA??? I don't think so!            01/01/70 00:00      
               I quoted 10mA for the 8051            01/01/70 00:00      
                  My aplogies ...            01/01/70 00:00      
         Sorry, Bing, but what you plan is nonsense!            01/01/70 00:00      
   In a FAQ I started            01/01/70 00:00      
   how much current, which voltage, for what            01/01/70 00:00      
   TPIC6B595            01/01/70 00:00      
      It is not available here in India            01/01/70 00:00      
         I'm confused...            01/01/70 00:00      
         What would happen if ...            01/01/70 00:00      
            Or Maybe I make my own IC            01/01/70 00:00      
               before you make your own IC            01/01/70 00:00      
                  Semicon plants and School Labs have foundries            01/01/70 00:00      
                     For one chip ?            01/01/70 00:00      
                        It is a special kind of service they offer for students            01/01/70 00:00      
                     Go ahead ... Give them a try!            01/01/70 00:00      
                     Sorry, but I doubt this...            01/01/70 00:00      
                        asked, at least 3 times            01/01/70 00:00      
                           I have not measured it yet            01/01/70 00:00      
                              SInce that's the most important bit of information ...            01/01/70 00:00      
                                 I am on vacation            01/01/70 00:00      
                              ridiculous            01/01/70 00:00      
                                 Even more simple            01/01/70 00:00      
                                    about 100 micro amps            01/01/70 00:00      
                                       the why on earth do you use a power chip?            01/01/70 00:00      
                                       Then you don't need the 2803 at all!            01/01/70 00:00      
                                          74hc595?            01/01/70 00:00      
                                             Why not look at a datasheet?            01/01/70 00:00      
                                             NOW, that you FINALLY answer the question            01/01/70 00:00      
                                                I still am considering making my own IC            01/01/70 00:00      
                                                   before you do so            01/01/70 00:00      
                                                   You are severely deluded            01/01/70 00:00      
                                                      r u envious?            01/01/70 00:00      
                                                         evidence            01/01/70 00:00      
                                       RE: about 100 micro amps            01/01/70 00:00      
                                          Spooky glow            01/01/70 00:00      
                                       Cutting Vegetable Using Sword...!!!...???            01/01/70 00:00      
                                          Nice Metaphors            01/01/70 00:00      
                                             my favourite            01/01/70 00:00      
                                                my favourite-            01/01/70 00:00      
                                          in light of the original poster's other threads ...            01/01/70 00:00      
               Bing, what current has to flow?            01/01/70 00:00      
               You might have a bit of trouble with that.            01/01/70 00:00      
                  Similar to            01/01/70 00:00      
                     Allegro            01/01/70 00:00      
                        That part is pretty expensive in small lots.            01/01/70 00:00      
   IO expansion            01/01/70 00:00      

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