X9C102PI

Overview

The X9C102PI is a digitally controlled potentiometer (XDCP) from the X9C10 series by Renesas Electronics. It features a linear resistance taper with a nominal value of 1 kΩ and provides 100 tap positions for precise adjustment. The device utilizes non-volatile memory to retain wiper settings across power cycles, recalling the position upon power-up. Control is managed via a simple three-wire serial interface consisting of Chip Select (CS), Up/Down (U/D), and Increment (INC) inputs. Designed for single-supply operation, it typically functions at 5 V with a supply range of 4.5 V to 5.5 V.

Feature Summary

• Non-volatile EEPROM storage retains wiper position after power loss
• Three-wire serial control interface (CS, U/D, INC)
• Linear resistance taper with 100 discrete tap points
• Single-channel configuration in an 8-pin PDIP package

Applications

• Signal processing parameter adjustment
• Control system gain setting
• Variable resistor replacement in analog circuits

Procurement Notes

Verify the package type against project requirements, as the 'PI' suffix indicates a Plastic Dual In-line Package (PDIP). Confirm that the through-hole mounting style aligns with the PCB design. Ensure the 5 V single-supply voltage specification meets the target circuit's power constraints before procurement.

Selection Notes

Select the X9C102PI when a through-hole digital potentiometer with non-volatile memory is required. Choose this model over surface-mount variants if manual assembly or prototyping on breadboards is necessary. Verify that the 1 kΩ resistance value and linear taper suit the specific impedance matching or voltage division needs of the application.

Part Context

The X9C102PI belongs to the X9C10 family of digitally controlled potentiometers, originally developed by Intersil and now manufactured by Renesas. This family includes variants with different resistance values such as the X9C103 (10 kΩ) and X9C104 (100 kΩ). All members share the same control logic and non-volatile memory architecture, differing primarily in total resistance and package options.

Replacement Considerations

Direct pin-compatible replacements include other packages of the same part number, such as the X9C102SZ (SOIC-8). Cross-family substitutes like the X9D102 offer similar functionality but may differ in interface protocols or power consumption characteristics.