The MICROCHIP TECH. MCP4021/2/3/4 series are non-volatile, 6-bit digital potentiometers designed for versatile applications. These devices offer a simple Up/Down (U/D) serial interface for wiper control and incorporate WiperLock technology to secure application-specific calibration settings in non-volatile memory. They are suitable for applications requiring adjustable resistance with non-volatile memory retention, such as display calibration, sensor adjustment, and gain control in audio circuits.