A RFID device having a nonvolatile ferroelectric memory regulates bit line capacitance to optimize a bit line sensing margin and minimize power consumption. The RFID device having an analog block adapted and configured to transmit and receive a radio frequency signal to/from an external communication apparatus, a digital block adapted and configured to receive a power voltage and the radio frequency signal from the analog block, transmit a response signal to the analog block and output a memory control signal, and a memory adapted and configured to store data and regulate bit line capacitance.