Can we please keep this thread on the original topic and not hijack it for another topic. Please create another thread.
On Wednesday, July 2, 2014 12:03:28 AM UTC-5, Rob Doyle wrote: > > On 7/1/2014 7:42 PM, norwestrzh via N8VEM-S100 wrote: > > <https://groups.google.com/d/optout>I just learned that apparently (I > > have not looked at the data sheet myself) MAXIM has changed the function > > of pin 2 on their serial line driver chip. The old configuration was a > > polarized cap. tied to gnd. (that's the way I always wired them), and > > their data sheet now shows the cap. tied to vcc (I'm told). Could > > account for the heat, and short service life!!! *grin* Bottom line is > > check the data sheets, or stick with T.I. 232 chips (they still work the > > same old way). Wonder why they did this???? > > > > Roger > > The CAP has a lower voltage across it when wired to VCC. Otherwise it > doesn't matter. It's just part of the charge pump. > > There are also newer variants of the MAX232 that don't require polarized > caps which I prefer. > > Rob. > > -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
