X9C303P

Overview

The X9C303P is a single-channel digitally controlled potentiometer (XDCP) manufactured by Renesas Electronics. It features a 32 kΩ end-to-end resistance with 100 linear taps, allowing precise analog signal adjustment via digital commands. The device operates on a single 5 V supply and includes non-volatile memory to retain wiper position settings during power cycles. Control is managed through a simple three-wire serial interface using CS, U/D, and INC pins. Packaged in an 8-lead DIP, it serves as a solid-state replacement for mechanical potentiometers in parameter adjustment and control applications.

Feature Summary

• Single channel with 32 kΩ total resistance and 100 linear tap positions
• Non-volatile memory retains wiper setting across power cycles
• Three-wire serial interface (CS, U/D, INC) for easy microcontroller integration
• Operates at 5 V with low standby current consumption

Applications

• Programmable gain amplifiers
• Audio volume control circuits
• Voltage reference trimming
• Sensor calibration systems

Procurement Notes

Verify component authenticity due to discontinuation status. Check for RoHS compliance markings on the package. Confirm pinout compatibility with existing PCB layouts before procurement. Review datasheet for specific operating temperature ranges and electrical limits.

Selection Notes

Select this model when a 32 kΩ resistance value is required. Ensure the application supports 5 V logic levels for the serial interface. Consider the PDIP-8 package constraints for board space. Verify that the 100-tap resolution meets the system's precision requirements.

Part Context

Part of the X9C30 series of digitally controlled potentiometers. Shares architectural similarities with X9C103 and X9C503 but differs in resistance value. Designed for CMOS processes offering low power consumption.

Replacement Considerations

Check for direct cross-reference part numbers from Renesas or Intersil. Verify pin-to-pin compatibility if substituting with other XDCP models. Ensure equivalent resistance and tap count match design specifications.