The UA9638CP is a high-accuracy, linearly adjustable voltage supervisor from Texas Instruments. It is designed to provide an accurate reference voltage for monitoring the power supply of a system, and it is ideal for supply voltages ranging from 1.3V to 5.5V. The UA9638CP provides two reference voltage outputs, each adjustable from 0.4V to 5.1V. The internal voltage reference is accurate to within ±1mV of the desired voltage output. It also features an open-drain reset output, programmable delay times, a reset-active indication, and an active-low manual reset input.