The Analog Devices MAX5421BEUB+ is a single-channel, 4-tap digital potentiometer with a 15kΩ end-to-end resistance and a linear taper characteristic. It uses a parallel interface for wiper position control and operates from a single 5V supply or dual ±5V rails. The volatile memory means the wiper setting resets to the midscale position at power-up, which suits calibration and trim applications where the initial condition is known.
The 15kΩ resistance is the full-scale value between the high and low terminals; the wiper resistance is typically 500Ω.