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???
12/14/06 15:34
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 		 #129477 - I would like change ds275
Responding to: ???'s previous message
Kai Klaas said:
Erik said:
forgive a person with (not) strong (enough) glasses.

I forgive you everything...

You know, it cannot happen to me, because I have X-ray eyes...

Erik said:
Can you state the outline of the regulator, the OP can do so easily or, at least post the chip namewith ALL letters and numbers, which via the datasheet will give the footprint.

I guess, it's the LM78L05 in TO92 package.

I would have suggested him the LP2950 yet, but this LDO is tricky (as most LDOs are) and needs a certain cap at its output to work stable. So, I hope I can convince Ralph not to change the supply voltage...

Kai


Hi Kai:
I would like to change ds275 to ds276 which works at 5v and 3v per app notes. I receive sample of the ds276 but could not find link to it on maxim site. So can not post link.
My sample is 8 months old so maybe they never went in full production? I did download app notes.
Maybe they moved location. Here's what it said:

ds276 low power transceiver chip
features
low-power serial transmitter/reeceiver for battery-backed systems
transmitter steals power from receive signal line to save power
Single 3v or 5v operation
Full duplex operation up to 20k bps
Ultra-low static current
Compatible with rs-232-e signals

So I guess this should work with 3.3v regulator?

All information on 89c2051 sbc is given in the link below:

http://www.allen-systems.com/mb51.htm

The ds276 is an exact replacement for the ds275 so it fits in the ds275 socket.
If any engineer looks at the above link it gives all information on my sbc from allen systems.

So Kai is their any reason I can not make this 3v sytem on this sbc?

comments from any member on site.


Best regards,

Ralph S



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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