Semiconductor memory device having local data line pair with delayed precharge voltage application point

A semiconductor memory device, comprising:

• a pair of first data lines;
• a first data line sense amplifier for sensing and amplifying data loaded on the pair of first data lines in response to a predetermined first control signal;
• a pair of second data lines;
• a first switch pair for connecting the pair of first data lines to the pair of second data lines in response to a predetermined second control signal;
• a first precharge unit for precharging the pair of second data lines to a first precharge voltage;
• a second precharge unit for providing a second precharge voltage;
• and
• a delay block for increasing an interval ranging from a time when the data loaded on the pair of first data lines is amplified to a time when the second precharge voltage is applied to the pair of second data lines.

A semiconductor memory device, comprising:

• a pair of bit lines for presenting data stored in a selected memory cell;
• a bit line sense amplifier for sensing and amplifying data loaded on the pair of bit lines in response to a predetermined sense enable signal;
• a pair of local data lines;
• a column selection switch pair for connecting the pair of bit lines to the pair of local data lines in response to a predetermined column selection signal;
• a pair of global data lines;
• a global connection switch pair for electrically connecting the pair of local data lines to the pair of global data lines in response to a predetermined block write control signal;
• a first precharge unit for precharging the pair of local data lines to a first precharge voltage;
• a second precharge unit for precharging the pair of global data lines to a second precharge voltage;
• and
• a delay block for delaying an activation time of the block write control signal to increase an interval ranging from a time when the data loaded on the pair of bit lines is amplified to a time when the second precharge voltage is applied to the pair of local data lines.