Fuse circuit and semiconductor device having the same

A semiconductor memory device, comprising:

• a memory cell array having a normal memory cell array connected to word lines and column selection lines and a redundant memory cell array connected to redundant word lines and redundant column selection lines;
• a row decoder configured to decode row address signals, generate word line driving signals, and transmit the word line driving signals to the word lines;
• and
• a redundant row decoder configured to decode the row address signals, generate redundant word line driving signals, and transmit the redundant word line driving signals to the redundant word lines when a defect occurs in at least one of the word lines,
• wherein the redundant row decoder includes a fuse circuit configured to select one of a plurality of power supply voltages according to an operation mode, use the selected power supply voltage as a power supply voltage for a logic operation, and perform a fusing operation to generate a fuse output voltage.

A semiconductor memory device, comprising:

• a memory cell array including a normal memory cell array connected to word lines and column selection lines and a redundant memory cell array connected to redundant word lines and redundant column selection lines;
• a column decoder configured to decode column address signals, generate column selection signals, and transmit the column selection signals to the column selection lines;
• and
• a redundant column decoder configured to decode the column address signals, generate redundant column selection signals, and transmit the redundant column selection signals to the redundant column selection lines when a defect occurs in at least one of the column selection lines,
• wherein the redundant column decoder includes a fuse circuit configured to select one of a plurality of power supply voltages according to an operation mode, use the selected power supply voltage as a power supply voltage for a logic operation, and perform a fusing operation to generate a fuse output voltage.