X9C303S8I

Overview

The X9C303S8I is a digitally controlled potentiometer (XDCP) manufactured by Renesas Electronics. It features a single potentiometer with 100 taps and a total resistance of 32 kΩ. The device utilizes a logarithmic taper and operates on a ±5 V power supply. It employs an Up/Down (U/D), Increment (INC), and Chip Select (CS) interface for control. The component is housed in an 8-SOIC package with a width of 3.90 mm. It includes nonvolatile memory to retain the wiper position during power-off. The operating temperature range extends from -40°C to +85°C, with a resistance tolerance of ±15%.

Feature Summary

• Logarithmic taper digital potentiometer with 100 tap positions
• Nonvolatile memory retains wiper setting after power loss
• 3-wire serial interface using CS, U/D, and INC pins
• Operates on ±5 V supply with 32 kΩ total resistance

Applications

• Audio volume control applications requiring logarithmic response
• Calibration circuits for sensor offset adjustment
• Variable gain amplifier settings in signal processing chains

Procurement Notes

Verify component authenticity through authorized distributors as the part status is listed as obsolete. Confirm package integrity upon receipt, specifically checking for damage to the 8-SOIC leads. Ensure storage conditions comply with moisture sensitivity level requirements before reflow soldering processes.

Selection Notes

Select this model when a logarithmic resistance profile is required rather than linear. Verify that the system voltage supports the ±5 V operating range. Consider the 32 kΩ resistance value against load requirements. Check if the 100-tap resolution meets the precision needs of the specific application design.

Part Context

This component belongs to the X9C303 series of digitally controlled potentiometers. The S8I suffix indicates the 8-SOIC surface-mount package variant. The series is characterized by its nonvolatile memory capability and simple incremental/decremental control interface, distinguishing it from I2C-based digital pots.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer resources for current equivalent components or pin-compatible alternatives suitable for redesign.