| 摘要 |
An output interface circuit realizes a fast and stable interface operation without any chip-size increase even if the external supply voltage varies within a specific range (e.g., from 5 V to 3.3 V or from 5 V to 2 V). The output interface circuit comprises a first and a second output buffer circuit for receiving an output signal of an internal circuit, and an output-level adjusting circuit for receiving the output signal of the second output buffer circuit, for level-adjusting the output signal, and for outputting the level-adjusted output signal to an external output terminal. The first or second output buffer circuit outputs a signal based on the value of an external supply voltage.
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