Patent attributes
Disclosed embodiments include a serial buffer device comprising first and second serial input/output (I/O) ports, first and second comparators, and a multiplexer having a first input coupled to the output of the first comparator and a second input coupled to the output of the second comparator. There is also a transistor, a third comparator having first and second inputs and an output, wherein the first input is coupled to the second serial I/O port, the second input is coupled to a third reference voltage source, and the output is coupled to the control terminal of the multiplexer. Additionally, the embodiment includes an impedance controlled driver circuit having an input and an output, wherein the input is coupled to the output of the third comparator and the output is coupled to the first serial I/O port.
