Wagner Lipnharski wrote:
>

(...)

> I used chips from Temic, as the TOIM3232 and TFDS4000, but the last one
> is a pain in the neck to get from the distributors, except if you want
> to buy in 750 pieces a time (whole reel). Their explanation is that once
> you open the sealed package the transceivers start to suffer from
> humidity and can not be restocked...

As whithin the recent discussion about smd-soldering in a reflow oven / toaster
the humidity which may vaporize is no problem after soldering - just
before (or more: during the reflow soldering).

> I wonder what happens after you
> solder them at the PCB... it must be some magic that stops the humidity
> attack.  Talking to someone at Temic, this person said that during the
> SMD reflow the unit cooks again and fix the humidity problem... then I
> asked him "what about if I solder it by hand"?... the guy probably
> entered in "duhhhh state" because I heard a long silence at the other
> side of the phone.

I think this guy just heard about "problems" but didn't know the whole story.

Kind regards,

        Stefan