--- In Jim George <> wrote:
>
> > I've used a MAX3100E (a bi-directional level shifter) to interface a
> > 2.8V gsm modem uart to 3.3V lpc2378 uart. The gsm modem was not 3.3v
> > tolerant. The MAX300X devices have a 1.2V - 5.5V range on VL and 1.65V
> > - 5.5V VCC range. Should easily work for your application.
>
> SN74CBT3244 is a similar part, from TI. Considerably cheaper on Digikey.
>
since you are only concerned with protecting the SOC input lines couldn't you
simply use a potential divider or safer a zenner?
.js
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