On 30 Jun 2000, at 17:27, Alan B. Pearce wrote:

> >I also dont under stand the caps, they call for 1uF for the 232
> >and .1uF for the 232A. One would think there would be a range of cap
> >values, perhaps with a tradeoff curve to indicate maybe less ouput
> >drive capability or something. They sure seem to have minimalist data
> >sheets :)
>
> Not quite what I was on about. If you check the 3232 data sheet you
> will find that different caps are specified for single voltage
> working, and variable voltage working. For variable voltage one cap is
> 0.1uF min, and the other three are 0.47uF min. For operating at fixed
> 3 Volt, all caps are 0.1uF min. For 5 volt fixed supply, one cap is
> 0.047uF minimum, and the other three are 0.33uF min. Go figure - but
> the way I read the data sheet, it only guarantees to swing the output
> +/-6 Volts.
>
Thanks for the info.  I didnt look at the data for these parts, only the
232 & 232A.. It does sound weird, but probably makes sense if one
had the block diagrams or the circuit for the voltage doubler circuits.