The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2008
Filed:
May. 15, 2007
Guoli Wang, Gilbert, AZ (US);
Joseph A. Thomsen, Gilbert, AZ (US);
Russell Cooper, Mesa, AZ (US);
Microchip Technology Incorporated, Chandler, AZ (US);
Abstract
A five volt tolerant integrated circuit signal pad having an initial fast pull-up to three volts and then operating as an open drain output with an external resistor for pulling up the output from about three volts to about five volts. The initial fast (active) pull-up is accomplished with active devices that reduces the overall pull-up time of a newer technology (lower operating voltage) integrated circuit output when transitioning from a logic 0 to a logic 1. Circuits of the integrated circuit output driver protect the internal operating circuit nodes from excessive voltage and leakage currents that would otherwise result from a voltage on the signal pad that is more positive than the operating voltage of the integrated circuit.