Semiconductor device having driver circuits and sense amplifiers

An apparatus comprising:

• first and second digit lines;
• a sense amplifier configured to operate on first and second power potentials and amplify a potential difference between the first and second digit lines, the sense amplifier having a first power node supplied with the first power potential, and a second power node supplied with the second power potential;
• a first transistor coupled between the first power node and a first power line supplying the first power potential;
• a second transistor coupled between the second power node and a second power line supplying the second power potential;
• a driver circuit configured to drive each of the first and second digit lines to different one of first and second logic levels from each other;
• a third transistor coupled between the driver circuit and the first digit line;
• and
• a fourth transistor coupled between the driver circuit and the second digit line,
• wherein in response to a first command the first transistor is activated to an ON state while the second transistor is in an OFF state and before the third and fourth transistors are activated to an ON state, and the second transistor is activated to an ON state after the third and fourth transistors are activated to an ON state.