Patent ID: 8295113

Claim:
A semiconductor device comprising: first to third data lines, each of which transfers data bidirectionally; a first switch that controls connection between the first and second data lines; a second switch that is connected between the second and third data lines; a first amplifier that is connected to the first data line and that amplifies data information on the first data line and holds amplified data information; a second amplifier that is connected to the second data line and that drives the third data line in accordance with data information on the second data line; a third amplifier that is connected to the third data line and that drives the third data line in accordance with external data information externally supplied; a fourth amplifier that is connected to the third data line and that receives data information transferred from the second amplifier to the third data line and outputs the data information as external data information; and a switch control circuit that generating a signal that controls the second switch, based upon a first control signal that controls precharging of the first data line.