| 摘要 |
In a semiconductor integrated circuit, an input-output circuit includes a flip-flop circuit (a front stage of an output circuit) between an input circuit unit and a tri-state output circuit unit (a final stage of an output circuit). This input-output circuit converts the level of the signal supplied from an internal circuit, which is operated by a first power source system, which provides a first supply potential and a grounding potential, of an LSI. After elapse of a certain time delay, the input-output circuit outputs a level converted signal to a device, which is operated by a second power source system, providing a second supply potential and a grounding potential, outside of the LSI.
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