CAT5115LI-50-G

Digital Potentiometers Overview

The CAT5115LI-50-G is a single digital potentiometer IC from onsemi, designed as an electronic replacement for mechanical potentiometers. It features a 32-position linear taper resistor array with a nominal resistance of 50 kΩ. The device operates on a single supply voltage ranging from 2.5 V to 6.0 V and consumes low power via CMOS technology. Control is managed through an increment/decrement serial interface using up/down counter logic. The component is available in multiple surface-mount packages including SOIC, TSSOP, and MSOP, and complies with RoHS standards.

Digital Potentiometers Feature Summary

• 32-position linear taper potentiometer with 50 kΩ nominal resistance
• Single supply operation range of 2.5 V to 6.0 V
• Increment/Down serial control interface for wiper position adjustment
• Low power CMOS technology suitable for battery-operated systems

Digital Potentiometers Applications

• Automated product calibration in high-volume production lines
• Remote control adjustments for inaccessible or hazardous environments
• Offset, gain, and zero control in signal conditioning circuits
• Tamper-proof calibration storage for security-sensitive equipment
• Contrast, brightness, and volume control in consumer electronics

Digital Potentiometers Procurement Notes

Verify the specific package variant (SOIC, TSSOP, or MSOP) required for the PCB footprint, as the base part number may be followed by suffixes indicating package type. Confirm that the 50 kΩ resistance value aligns with circuit impedance requirements. Ensure the design supports the 2.5 V to 6.0 V operating range and utilizes the correct serial interface timing for the increment/decrement protocol.

Digital Potentiometers Selection Notes

Select this component when a non-volatile or volatile memory requirement is not specified in the prompt, but note that standard CAT5115 variants often retain state only during power. Compare against CAT5113 if 100 taps are needed or CAT5116 if logarithmic taper is preferred. Verify that the 32-tap resolution is sufficient for the application's precision needs. Check package availability if space constraints require MSOP over SOIC.

Digital Potentiometers Part Context

The CAT5115 series replaces mechanical pots in applications requiring remote or automated adjustment. The LI-50-G designation specifically indicates the 50 kΩ linear version. This family allows for digital control of analog parameters without physical user interaction, enhancing reliability in sealed or automated systems.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same family include CAT5115VI-50-G (SOIC package) or CAT5115YI-50-G (TSSOP package). For different resistance values, consider CAT5115LI-10-G (10 kΩ) or CAT5115LI-100-G (100 kΩ). Ensure the substitute maintains the same 32-tap count and linear taper characteristic.