A Simple I/O Buffer Circuit for Mixed Voltage Applications
نویسنده
چکیده
A very simple circuit design of a bidirectional input/output(I/O) buffer is proposed for mixed voltage interface applications. By a floating N-well circuit technique two series PMOS transistors are used as an active pull-up driver. Such a structure provides a simple circuit that requires only a single terminal pad, a single power supply, and is free of DC leakage current. Mixed voltage interface applications such as 3.3V/5V are demonstrated. Key-Words: I/O buffer, Mixed voltage, Interface, Floating N-well, Single pad, Single terminal, DC leakage
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