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Semiconductor device having output driver

Image Number 6 for United States Patent #8436657.

To provide an output driver that outputs read data to outside and a mode register that sets a swing capability of the output driver. A transition start timing of the read data driven by the output driver is made relatively earlier when a swing capability of the output driver set by the mode register is set to be relatively large, and the transition start timing is relatively delayed when the swing capability of the output driver set by the mode register is set to be relatively small. With this configuration, a timing when the read data exceeds a threshold level can be caused to coincide with a desired timing regardless of the swing capability of the output driver.

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