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:
Oct. 27, 1992
Filed:
Aug. 27, 1991
Yoshinori Hashimoto, Nara, JP;
Sharp Kabushiki Kaisha, , JP;
Abstract
An integrated circuit device is provided in an integrated circuit which has an input/output terminal device for inputting a signal onto an internal input line and outputting a signal from an internal output line during a normal operation of the integrated circuit. The integrated circuit device includes a test terminal through which a test mode signal is inputted, the test mode signal being inputted when a withstand voltage test is to be performed with respect to the integrated circuit. The integrated circuit device also includes a switching device disposed between the internal input line and the input/output terminal device and between the internal output line and the input/output terminal device, to which the test mode signal is inputted from the test terminal, for electrically coupling the internal input and output lines with the input/output terminal device during the normal operation and disconnecting the internal input and output lines with the input/output terminal device when the test mode signal is inputted.