A method and a circuit system for using equivalent integrated-circuit devices operating at different voltages

摘要

The circuit system comprises an integrated circuit which is one of a family of equivalent integrated circuits that comprises a first-generation integrated circuit (IC1g') operating at the supply voltage of the circuit system (V) and at least one subsequent-generation integrated circuit (IC2g') having a portion (A') operating at a lower voltage. The first-generation integrated circuit (IC1g') has a direct electrical connection (SC) between one (VDD1g) of the supply terminals and another terminal (VDD2g). The subsequent-generation integrated circuit (IC2g') has a voltage reducer with regulator (RG) the output of which is connected to the said other terminal (VDD2g). A filter capacitor (C) is connected between the said other terminal (VDD2g) and one (VSS) of the supply terminals.