Opposite of a voltage divider?

If you've got 5V available so you don't have to generate the 5V supply, it's fairly easy to boost a 0-3.3V logic circuit up to 0-5V. Interfacing 3.3V logic to 5V logic (and vice-versa) is a common problem.

A quick-search turned-up [u]74LVC4245[/u].