Patent Number: 6,297,683

Title: Voltage supply discriminator and method

Abstract: A voltage supply discriminator circuit senses multiple logic voltage supply levels and produces a plurality of control signals to select either or both of an output buffer circuit and/or an input buffer circuit that is coupled to a pad or pin. The discriminator circuit utilizes an input/output ring voltage supply and a reference voltage, such as a core voltage supply, to determine the appropriate circuitry to be used for the I/O pad. The appropriate circuitry is then automatically activated.

Inventors: Drapkin; Oleg (North York, CA), Temkine; Grigori (Toronto, CA)

Assignee: ATI International Srl

International Classification: G06F 1/26 (20060101); H03L 005/00 ()

Expiration Date: 10/02/2018