X9C503ST1

Overview

The X9C503ST1 is a digitally controlled potentiometer (XDCP) manufactured by Renesas Electronics Corporation. It features a single-channel configuration with a total resistance of 50 kOhms and a linear taper. The device includes 100 tap positions for precise wiper adjustment, controlled via a serial 3-wire interface consisting of CS, U/D, and INC inputs. Non-volatile memory retains the wiper position during power cycles. It operates on a single 5V supply within a voltage range of 4.5V to 5.5V, consuming approximately 1mA of current. The component is housed in an 8-lead SOIC package and supports surface-mount installation.

Feature Summary

• Non-volatile EEPROM storage maintains wiper position across power cycles
• Serial 3-wire control interface (CS, U/D, INC) simplifies microcontroller integration
• Linear resistance taper with 100 discrete tap positions
• Single-channel design with 50 kOhm nominal resistance

Applications

• Signal processing parameter adjustment
• Control system variable resistor applications
• Hardware gain or bias level setting

Procurement Notes

Verify the specific suffix 'ST1' against official Renesas documentation to confirm tape-and-reel packaging and industrial temperature ratings. Cross-reference with the standard 'SZT1' variant to ensure pinout and electrical specifications match the design requirements before procurement.

Selection Notes

Select this component when non-volatile memory retention is required for digital potentiometer settings. Ensure the 50 kOhm resistance value fits the circuit impedance constraints. Verify that the 3-wire serial interface aligns with available microcontroller GPIO resources and that the 8-SOIC package fits the PCB footprint.

Part Context

This part belongs to the X9C503 family of digitally controlled potentiometers from Intersil/Renesas. It shares core architecture with variants like X9C503SZT1 but may differ in packaging format or temperature grade based on the suffix. The family is designed for replacing mechanical potentiometers in space-constrained applications.

Replacement Considerations

Direct replacements include X9C503SZT1 and X9C503SIZT1. Verify that the substitute part matches the required operating temperature range and packaging type (tube vs. reel). Check for any pinout differences if using a different package style.