The MCP41100-E/P is a low-voltage, volatile digital potentiometer from Microchip. It is an 8-bit devices that can be used to adjust the resistance between two terminals in devices such as audio systems, instrumentation and monitoring circuits. The MCP41100-E/P has an internal EEPROM that allows it to hold its last state after power is removed or applied. The device is low voltage and uses very low current, making it suitable for applications such as battery-operated systems. It is available in various configurations, such as an 8-pin PDIP, an 8-pin SOIC and an 8-pin UDFN package. In addition, the MCP41100-E/P can be used as a bidirectional controller with support for SPI and I2C communication protocols.