The X9C103ST4 is a digitally controlled potentiometer (XDCP) from Intersil (formerly Xicor). It provides an electronically adjustable resistance that can be controlled through a digital interface. This device is ideal for applications requiring precise and repeatable resistance adjustments without mechanical components.

Applications:

• Volume Control
• Brightness Control
• Contrast Control
• Calibration Circuits
• Sensor Adjustment

Features:

• 100-Tap Points
• SPI Interface
• Resistance Value: 10 kΩ
• Non-Volatile Memory: Retains wiper position after power-down
• Operating Voltage: 5V

Benefits:

• Precise Adjustment: Digital control allows for accurate and repeatable resistance settings.
• Non-Volatile Memory: Wiper position is stored in non-volatile memory, eliminating the need for recalibration after power loss.
• SPI Interface: Simple serial interface for easy integration with microcontrollers.
• Reliability: Eliminates mechanical wear associated with traditional potentiometers.
• Compact Size: Small package size allows for space-saving designs.

Additional Details:

The X9C103ST4 is commonly used in applications where a precise and stable resistance value is required. The resistance between the two end terminals is fixed at 10 kΩ, and the wiper position determines the resistance between the wiper terminal and each end terminal. The wiper position is controlled through the SPI interface, allowing the microcontroller to set the desired resistance value. The non-volatile memory ensures that the set value is retained even after the power is turned off. The SPI interface allows precise setting and read-back of the current wiper position. Detailed timing specifications are provided in the datasheet.