Need an IC to do something. Suggestions?

[Basement_Modder]

It needs to run on a somewhat low voltage. (3 VDC or approx.)

It must preform the task of outputting voltage on specific pins, based on weather other ones are grounded.

For example: Pin 1 is connected to GND, so pin 6 outputs voltage. Now pin 2 in connected to GND, so pin 7 outputs voltage. I need it for multiple connections, but using more than one IC is fine by me, but I prefer that at least 3 or 4+ pins are available for voltage output.

Anybody have any suggestions?

[Basement_Modder]

Due to suggestions, I'm going with a logic hex inverter.