1x1:8 Digital Demultiplexer question

I couldn't find a 1x1:8 demultiplexer on Digikey, but I did find a few 1x3:8. If I hold the 2 unused pins low on this one, it should work as 1x1:8, right?

Here's the chip: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=497-1799-5-ND

This will be used to light up leds (one at a time) and save pins on my arduino.


No. The chip won't work the way you want. You'd be better off following this tutorial if you want to save pins:


You can keep adding more 595 chips without using any more Arduino pins.

Oh, that’s perfect! Thanks! I already use the shiftout function, so I’ll know just how to code this.