Integrated circuit for storing information

1. An integrated circuit comprising:

a variable resistance unit including at least one transistor that receives a control signal and changes a resistance through the transistor in response to the control signal in a programming operation mode;

an information detection unit configured to detect programming information in response to an output voltage of the variable resistance unit in a normal operation mode; and

a power supply unit coupled to the transistor of the variable resistance unit and configured to change a power voltage, which is supplied to the variable resistance unit, to a power supply voltage or a pumping power voltage, and supply the power supply voltage or the pumping voltage in response to which one of the programming operation mode and the normal operation mode that the integrated circuit operates in.

2. The integrated circuit of claim 1 , wherein the transistor includes a CMOS transistor.

3. The integrated circuit of claim 2 , wherein the resistance of the CMOS transistor in a turned-on state is changed in response to the control signal.

4. The integrated circuit of claim 1 , wherein the transistor has a source-drain path formed between a first power voltage terminal and an output terminal of the variable resistance unit and is arranged to receive the control signal through a gate of the transistor.

5. The integrated circuit of claim 4 , further comprising:

a fixed resistance unit coupled between the output terminal and a second power voltage terminal.

6. The integrated circuit of claim 1 , wherein the information detection unit is configured to compare an output voltage of the variable resistance unit with a reference voltage and output the programming information based on the comparison.