| 摘要 |
A semiconductor integrated circuit device of the present invention is provided with: first and second external terminals, each of which receives a corresponding one of two different potentials applied thereto; first and second switches that are connected in series between the first and second external terminals and connected together at a node from which an output signal is extracted; a heat generation detector portion for detecting a monitored temperature; and a drive circuit for performing on/off control of the first and second switches. When the monitored temperature reaches a first threshold temperature, both the first and second switches are turned off, and, when the monitored temperature reaches a second threshold temperature that is higher than the first threshold temperature, the first and second external terminals are short-circuited so as to operate an overcurrent protection element connected externally. With this configuration, it is possible to perform by inexpensive means an overheat protection operation that offers a higher level of safety.
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