X9C303PIZ

Overview

The X9C303PIZ is a single-channel logarithmic Digitally Controlled Potentiometer (XDCP) manufactured by Renesas Electronics. It features a total end-to-end resistance of 32 kΩ and provides 100 discrete tap positions for wiper adjustment. The device utilizes a nonvolatile memory architecture to retain the wiper position during power-off, recalling the last stored setting upon power-up. It operates on a single 5 V supply with a maximum operating current of 1 mA. Control is managed via a serial interface requiring three inputs: Chip Select (CS), Up/Down (U/D), and Increment (INC). The component is housed in an 8-lead PDIP package.

Feature Summary

• Logarithmic taper characteristic with 32 kΩ total resistance
• 100-position wiper control with nonvolatile storage
• Simple 3-wire serial increment/decrement interface
• Single 5 V CMOS supply operation

Applications

• Audio volume control circuits
• Parameter adjustment in sensor systems
• Programmable gain amplifier biasing

Procurement Notes

Verify component authenticity through official Renesas channels or authorized distributors. Confirm the specific suffix 'PIZ' corresponds to the PDIP-8 package variant. Check for End-of-Life (EOL) status as this series may be discontinued. Ensure environmental compliance documentation matches project requirements.

Selection Notes

Select this model when a logarithmic response curve is required rather than linear. Verify that the 32 kΩ resistance range fits the circuit impedance constraints. Confirm the 100-tap resolution is sufficient for the application's precision needs. Ensure the design supports the 3-wire serial control logic timing.

Part Context

This part belongs to the X9C30x family of digitally controlled potentiometers. It shares the same control interface and memory structure as other variants in the series but differs in resistance value and taper type. The 'Z' suffix typically indicates lead-free packaging compliant with RoHS standards.

Replacement Considerations

Direct replacements include the X9C303PI or X9C303V8Z from Intersil/Renesas. Verify pin compatibility and electrical specifications before substitution. Alternative digital potentiometers with SPI interfaces require significant firmware changes.