| 摘要 |
A column select pulse generator and a semiconductor memory device including the same are provided to generate a column select pulse capable of discriminating failure of write or read operation, by controlling pulse width of the column select pulse according to the write operation and the read operation. A column select pulse generation part outputs a write column select signal and a read column select signal with pulse width in correspondence to a write command and a read command. A column select signal output part(300) outputs a column select pulse with pulse width controlled in correspondence to the write column select signal and the read column select signal. The column select signal generation part includes a write column pulse generation part(100) outputting the write column select signal by controlling the pulse width by a first test mode signal and a write pulse generated in correspondence to the write command, and a read column pulse generation part(200) outputting the read column select signal by controlling the pulse width by a second test mode signal and a read pulse generated in correspondence to the read command.
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