lax123:
wow thank you very much , this is great because i got an uno and this could save me quite some bucks i could spend on other fancy ardu hardware.
You are welcome.
Its says "can switch fast" between different pins, do you have an idea which range "fast" means?
I don't. The datasheet is the best place to get answers for questions like that.
Is there something like that also for digital pins?
I believe those chips will also work for digital inputs. For digital outputs shift registers are a good choice.