MCP4642-503E/UN

Digital Potentiometers Overview

The MCP4642-503E/UN is a dual-channel digital potentiometer IC manufactured by Microchip Technology. It features two independent rheostat configurations with a nominal resistance of 50 kΩ and ±20% tolerance. The device provides 129 taps (7-bit resolution) per channel, allowing precise resistance adjustment via an I²C serial interface. It incorporates nonvolatile memory to retain wiper settings after power loss and supports WiperLock™ technology for security. Operating voltages range from 1.8V to 5.5V, with extended temperature coverage from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual-channel rheostat configuration with 50 kΩ nominal resistance
• 7-bit resolution providing 129 discrete tap positions
• Nonvolatile EEPROM memory with automatic recall and WiperLock™ protection
• I²C serial interface supporting 100 kHz, 400 kHz, and high-speed modes

Digital Potentiometers Applications

• Calibration of sensor signal paths
• Adjustable gain control in amplifier circuits
• Voltage reference trimming
• System bias adjustment

Digital Potentiometers Procurement Notes

Verify the specific suffix 'E/UN' corresponds to the MSOP-10 package and lead-free RoHS compliance when sourcing. Confirm that the '503' code accurately indicates the 50 kΩ resistance value required for the design. Ensure the I²C bus voltage levels are compatible with the selected supply voltage range.

Digital Potentiometers Selection Notes

Select this component when a dual-channel variable resistor is needed rather than a potentiometer. The 50 kΩ value suits moderate impedance applications. Verify that the system requires nonvolatile storage for calibration data. Check if the 7-bit resolution meets the required precision; higher resolution options exist in the same family.

Digital Potentiometers Part Context

This part belongs to the MCP454X/456X/464X/466X family of digital potentiometers. The '46' prefix denotes a dual-channel device, while the '2' suffix specifies the rheostat configuration. The '503' indicates the 50 kΩ resistance option, distinguishing it from 5k, 10k, or 100k variants within the series.

Digital Potentiometers Replacement Considerations

Direct replacements include other MCP4642 variants with different resistance values (e.g., MCP4642-502E/UN for 5 kΩ). For single-channel needs, consider the MCP4542 series. Ensure any substitute maintains the MSOP-10 package and I²C interface compatibility.