| 摘要 |
An input/output circuit device includes a first transistor which is formed at a substrate, a first gate of which receives an input signal, one of a first source and drain of which is connected to a first power supply terminal, and the other of the first source and drain of which is connected to an internal node; and a second transistor which is formed at the substrate, a second gate of which is connected to a second power supply terminal, one of a second source and drain of which is connected to an input/output node, and the other of the second source and drain of which is connected to the internal node. The substrate of the second transistor has an electrically floating potential.
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