Unable to figure out the Voltage levels of LED Strip Controller LPD8806
It's not very clear. The datasheet specifies Vin between -0.4V and (Vout+0.4V). But Vout is not specified, but a reasonable assumption is that they intended to state Vdd (which has a maximum of 5.5V). Basically, it will operate with 5V signals. Since the datasheet does not give the logic thresholds for Vil and Vih it is not possible to determine if it will work with 3V or 3.3V logic.