Abstract: A clocked electronic flip-flop device which uses a novel method of storing digital data that is immune to metastability, regardless of data input level or timing, is disclosed. The method includes first converting the data input level to a stored voltage level which, in turn, is operably disconnected from its input source after the active transition of an external clock signal. In a preferred embodiment, the data input level is combined in an EXCLUSIVE OR circuit with the existing state of the flip-flop device to produce the stored voltage. The stored voltage is processed by a high-speed comparator which causes an internal clock pulse to be generated if and only if the amplitude of the stored voltage level exceeds a predetermined threshold level range. The internal clock pulse, if generated, is then used to toggle a conventional type flip-flop element comprising the output stage of the device into the opposite logic state.