1. A random number generator device, comprising: a plurality of cells arranged in at least a row to form an addressable array, each cell including: a first electrode; a second electrode; a phase change material electrically coupled between the first electrode and the second electrode, the phase change material being capable of changing phase between a high state and a low state in response to an electrical current; and a read/write controller electrically coupled to the array and configured to program all cells in the array to a high state and subsequently to introduce a programming current into the array sufficient to randomly set each cell to the high state or the low state to generate a random distribution of cell states across the array.