| 摘要 |
PURPOSE: A semiconductor memory device and an operating method are provided to implement the low power consumption of a semiconductor memory device by enabling minimum number of a buffering part to be operated after entering a max power down mode. CONSTITUTION: In a semiconductor memory device and an operating method, a buffering part(221) buffers a first mode signal which is inputted from outside. A second buffering part(222) is activated in response to the output signal of the first buffering part. A second buffering part buffers a second mode signal. The first mode signal is an external command signal. The second mode signal is a clock enable signal.
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