MC33161DG is a general-purpose, programmable, dual-voltage monitor (supervisory IC), also known as a reset IC or power monitor. Its core function is to continuously monitor two power supply voltages. When either voltage falls below a user-defined threshold, it outputs a reset signal (or alarm signal) to ensure that microprocessors, DSPs, or other digital systems can safely reset or enter a protected state during power anomalies, preventing code runaway or data corruption.