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:
Mar. 06, 1990
Filed:
Sep. 08, 1988
Robert A Pease, San Francisco, CA (US);
Mansour Izadinia, Santa Clara, CA (US);
Jonathan Klein, Palo Alto, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
An integrated circuit is disclosed having a thermal shutdown capability. A single chip bonding pad is coupled to a circuit that will operate the bonding pad at a low potential for normal conditions and will pull it high when a temperature threshold is crossed. Thus, the normally low bonding pad provides a temperature flag. The bonding pad is also coupled to a latch that will hold it high and to a lockout circuit that acts to disable the heat producing chip circuitry. Therefore, when the bonding pad is once driven high the circuits are locked out and will remain out until a start up command is present. This is achieved by either momentarily removing the power supply or by pulling the bonding pad low. Both manual and computer control of the circuit is disclosed.