| 摘要 |
An apparatus and a method for controlling a column selecting signal of a semiconductor memory are provided to maximize reliability of a memory operation by preventing an output error of the column selecting signal according to the variation of an external voltage by controlling the column selecting signal according to the external voltage level. A column decoder(10) outputs a first column selecting signal. A delay part delays the first column selecting signal. A logic circuit part outputs a second column selecting signal by controlling the enable period of the first column selecting signal, by calculating the first column selecting signal and the output of the delay part. An output control unit(300) outputs the first column selecting signal or the second column selecting signal in response to the input of a voltage detection signal.
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