X9C503S

Overview

The X9C503S is a single-channel digitally controlled potentiometer (XDCP) manufactured by Renesas Electronics Corporation. It features a 50 kΩ end-to-end resistance with a linear taper and 100 discrete tap positions. The device utilizes a non-volatile memory architecture to retain wiper settings during power-off, recalling the last position upon power-up. It operates on a single 5V supply voltage and communicates via a three-wire interface consisting of Chip Select (CS), Up/Down (U/D), and Increment (INC) signals. The component is housed in an 8-SOIC surface-mount package.

Feature Summary

• Non-volatile memory retains wiper position data without external power
• Three-wire serial control interface (CS, U/D, INC)
• Linear resistance taper with 100 adjustable taps
• Single channel configuration in 8-SOIC package

Applications

• Programmable gain adjustment in signal processing circuits
• Volume control in audio equipment
• Offset voltage trimming in amplifier circuits
• Parameter adjustment for industrial control systems

Procurement Notes

Verify the specific suffix designation when ordering, as variations such as SZ or SIZT1 indicate differences in packaging formats like tubes versus tape and reel. Confirm the operating temperature range requirements against the specific suffix variant, as commercial and industrial grades may differ. Ensure compatibility with the 5V logic levels used by the control interface.

Selection Notes

Select this component for applications requiring precise digital adjustment of analog resistance values. The 50 kΩ resistance value suits moderate impedance circuits. Verify that the system can accommodate the 40 Ω typical contact resistance. Ensure the PCB layout supports the 8-SOIC footprint dimensions of 3.90 mm width.

Part Context

This part belongs to the X9C503 family, which includes variants with different resistance values such as 10 kΩ (X9C103) and 100 kΩ (X9C104). All members share the same pinout, control interface, and non-volatile memory functionality, allowing for design flexibility while maintaining consistent software and hardware integration across different resistance ranges.

Replacement Considerations

Direct replacements include other parts within the X9C503 series with identical pinouts and functionality but different resistance values if circuit constraints allow. Cross-manufacturer equivalents must be verified for compatible 3-wire interface timing and non-volatile memory behavior.