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:
Feb. 15, 2005
Filed:
Sep. 05, 2003
Christopher K. Chun, Austin, TX (US);
Christopher K. Chun, Austin, TX (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
An integrated circuit () includes a multiple voltage digital multiplexer circuit () for multiplexing digital signals provided at different supply voltage levels. In one form, the multiplexer () includes an analog multiplexer () for receiving the digital signals, a level shifter () coupled to the output of the analog multiplexer (), and a supply voltage multiplexer () for providing one of various supply voltages used on the IC corresponding to the signals being multiplexed. A control circuit () is used to control the input selection of the analog multiplexer () as well as the supply voltage multiplexer () for providing the correct supply voltage to the level shifter (). This provides the ability to multiplex digital signals of differing voltage levels onto a single pad on the IC ().