Voltage switching circuit and semiconductor memory device having the same

A voltage switching circuit for selectively transferring voltages applied to a first input terminal and a second input terminal to a first output terminal and a second output terminal, the voltage switching circuit comprising:

• a first switching circuit configured to selectively transfer a first voltage applied to the first input terminal to the second output terminal;
• and
• a second switching circuit configured to selectively transfer a second voltage applied to the second input terminal to the second output terminal,
• wherein the first voltage is transferred to the first output terminal, and
• wherein at least one transistor included in the first switching circuit is formed on a well different from that on which at least one transistor included in the second switching circuit is formed, and
• wherein the first output terminal and the second output terminal are connected to different planes.

A switching circuit comprising:

• a first transistor configured to transfer a first voltage from a first input node to a first output node;
• second and third transistors configured to transfer, when turned on, a second voltage from a second input node to a second output node;
• and
• a fourth transistor configured to transfer, when turned on, the first voltage to the second output node,
• wherein the second transistor is formed on a different well from the first, third and fourth transistors, and
• wherein the first and second voltages have different polarities, and
• wherein the first output node and the second output node are connected to different planes.