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. 23, 1999
Filed:
Jul. 23, 1996
Tomio Suzuki, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A burn-in mode setting circuit in a semiconductor memory device renders a burn-in mode detection signal .phi..sub.BB active upon detection of a burn-in mode being set according to a first combination of external control signals. A voltage-down circuit responds to the burn-in mode detection signal .phi..sub.BB to suppress a voltage-down operation. A burn-in mode state output control circuit renders an operation mode confirmation signal .phi..sub.WCBR active upon detection of an external request of confirmation of an operation mode according to a second combination of external control signals during a burn-in mode. An output buffer circuit responds to a signal .phi..sub.WCBR to provide a signal according to the burn-in mode detection signal .phi..sub.BB to an input/output terminal.