5V to 3.3V UART conversion

<omalley.ronan@gmail.com> wrote in message
news:1140622531.800329.256600@g47g2000cwa.googlegroups.com...
> but what happens if there is a spike in the voltage on the 5v side of
> the voltage divider? My dsp board cant tolerate anything greater than
> 3.8V max. is the voltage divider really that reliable?

The junction diodes on the 3.3V input to the VCC/GND will take care of that,
while the current will be limited by the series resistor.

Meindert