Integrated circuit detecting the characteristic of an external system

摘要

The integrated circuit comprises an output circuit feeding an external system connected to an output terminal of the integrated circuit and a detection circuit of the characteristic of the external system. The detection circuit includes a comparator for comparing the voltage on the output terminal in response to a signal delivered by the output circuit with a voltage of reference, memorizing means memorizing at different times the result of the comparison and a logic circuit connected to the memorizing means which delivers at its outputs combinations of logic states depending upon the characteristics of the external systems, the combinations of logic states being utilized by the integrated circuit to control the external systems in accordance with their particular characteristics.