I have just recently bought a few different ic's from Mouser.com, not thinking i never even looked to see if i could use them. I Wound up getting a few Azoteq IQS128 capacitive touch sensors, but I have absolutely no clue which pins are which and how to wire them to an arduino. Any help would be appreciated.
The datasheet is available on http://www.azoteq.com - see the pinout there.
The effective operation of the IQS128 is dependent on good de-coupling at the VDDHI and VREG lines (see the reference designs)
If you have ordered 957-IQS12800100TSR you will have a proximity output on pin3.
If you have ordered 957-IQS12800000TSR then pin3 is an input (ENABLE/DISABLE). You will have to pull pin3 high in order to enable the IQS128.
See the manual for some information on the layout used on the 957-IQS128EV01.
Buying the 957-IQS128EV01 would give you a module that can be quickly wired/plugged into your design.