Abstract: An abnormality detection circuit includes: a first current source configured to generate a first current flowing from an external terminal toward a reference potential terminal; a second current source configured to generate a second current flowing from a power supply potential terminal toward the external terminal; a comparator configured to generate an abnormality detection signal by comparing a detection voltage corresponding to an application voltage of the external terminal with a predetermined threshold voltage; and a controller configured to switch between a first abnormality detection mode in which an operation of generating the first current is performed and a second abnormality detection mode in which an operation of generating the second current is performed.