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:
Sep. 19, 2017
Filed:
Jan. 15, 2015
Taiwan Semiconductor Manufacturing Company, Ltd., Hsin-Chu, TW;
Lei Pan, Shanghai, CN;
Qingchao Meng, Shanghai, CN;
Taiwan Semiconductor Manufacturing Company, Ltd., Hsin-Chu, TW;
Abstract
A device includes a transistor cascode circuit including a first transistor configured to pull up voltage of a bulk and a node in response to a first control signal, and a second transistor configured to pull up voltage of an interface (I/O) pin in response to a second control signal. The device further includes a third transistor configured to pull down voltage of the I/O pin in response to a third control signal, and a feedback circuit configured to turn off the first transistor when the voltage of the I/O pin is above a predetermined level during a failsafe period.