Low-power interface and method of operation

摘要

In a particular embodiment, a method includes modifying an output impedance associated with the input receiver. In response to modifying the output impedance, the method restricts an output voltage at an output node of the input receiver. Particular embodiments of an input receiver circuit are also disclosed.

主权项

1. A device comprising:
an input receiver having a first mode of operation in which the input receiver is configured to receive an input voltage signal from a first power domain powered by a first supply voltage and to level-shift the input voltage signal into an output voltage signal carried on a first output node in a second power domain powered by a second supply voltage that is less than the first voltage, the input receiver having a second mode of operation in which the input receiver does not receive the input voltage signal, the input receiver comprising: an output load coupled to the first output node; a first circuit configured to disconnect the output load from ground to prevent the output load from loading the first output node during the second mode of operation and to connect the output load to ground to load the first output node with the output load during the first mode of operation; and a second circuit configured to clamp the output voltage signal during the second mode of operation.