Data flip-flop circuit of nonvolatile memory device and nonvolatile memory device including the same

Abstract

A data flip-flop circuit includes a flip-flop, a recovery latch and a cut-off transistor. The flip-flop stores a data signal that is input, using a clock signal and a virtual power supply voltage and provides the stored data signal as an output signal at an output node in response to a rising transition of the clock signal. The recovery latch is connected to a power supply voltage and a ground voltage, is connected to the flip-flop at the output node, stores the output signal internally in response to a first transition of a chip enable signal, recovers the stored output signal in response to end of a power gating interval based on the chip enable signal, and provides the recovered output signal to the flip-flop. The cut-off transistor floats the virtual power supply voltage provided to the flip-flop based on a first power gating signal.