SEMICONDUCTOR MEMORY DEVICE AND ITS OPERATING METHOD, IN WHICH CURRENT CONSUMPTION OF PRECHARGING INPUT/OUTPUT LINES IS REDUCED

摘要

PURPOSE: A semiconductor memory device and its operating method are provided to prevent skew between input/output lines. CONSTITUTION: The semiconductor memory device includes a plurality of input/output line pairs, and a driving circuit which operates in response to the input of a write command signal and drives the input/output line pairs according to external data. The first precharge circuit(130) precharges the input/output line pairs to the first voltage(VCC). The second precharge circuit(140) precharges the input/output line pairs to the second voltage(VCC-Vth,GND) lower than the first voltage. And a timing control circuit disables the first precharge circuit and enables the second precharge signal in response to the input of an active command signal.