X9C303S8IZ

Overview

The X9C303S8IZ is a logarithmic Digitally Controlled Potentiometer (XDCP) manufactured by Renesas Electronics. It features a single potentiometer with 100 wiper tap points and a total end-to-end resistance of 32 kΩ. The device utilizes nonvolatile memory to store the wiper position, allowing it to recall settings upon power-up. It operates with terminal voltages up to ±5V and communicates via a three-wire serial interface. The component is housed in an 8-lead SOIC package.

Feature Summary

• Logarithmic taper with 100 resistive elements for precise control
• Nonvolatile memory retains wiper position during power loss
• Three-wire serial interface (CS, U/D, INC) for digital control
• Operates on a single 5V supply with low power consumption

Applications

• Audio volume and tone control circuits
• Programmable gain amplifiers
• Voltage reference adjustment
• Sensor calibration systems

Procurement Notes

Verify component authenticity through authorized distributors as the X9C303 series has been discontinued by Renesas. Check for RoHS compliance status specific to the manufacturing date code. Confirm package integrity and pin alignment before integration into PCB designs due to legacy status.

Selection Notes

Select this model when a logarithmic response curve is required for audio or sensor applications. Ensure the design supports ±5V terminal voltage limits. Verify that the microcontroller can drive the three-wire serial interface. Consider the 32 kΩ resistance value against load requirements to prevent excessive current draw.

Part Context

The X9C303S8IZ belongs to the X9C30x family of digitally controlled potentiometers originally developed by Xicor and later acquired by Intersil, now part of Renesas Electronics. This specific suffix denotes the 8-lead Small Outline Integrated Circuit (SOIC) package variant within the broader product line.

Replacement Considerations

Public confirmed substitute part numbers include CAT5116 from ON Semiconductor and ISL23318TFUZ from Renesas. These alternatives offer similar functionality but may differ in tap count, resistance values, or interface protocols. Validate electrical compatibility before substitution.