MCP4242T-103E/MF

Digital Potentiometers Overview

The MCP4242T-103E/MF is a dual-channel digital potentiometer IC from Microchip Technology, featuring non-volatile memory and WiperLock™ technology. It provides two independent rheostat configurations with 10 kΩ resistance (R_AB) and 7-bit resolution, offering 129 discrete steps. The device operates on an SPI serial interface at frequencies up to 10 MHz and supports a supply voltage range of 2.7V to 5.5V for specified characteristics, extending down to 1.8V for operation. Key electrical parameters include a typical wiper resistance of 75 Ω, a maximum operating temperature of +125°C, and high-voltage tolerant digital inputs up to 12.5V.

Digital Potentiometers Feature Summary

• Dual Resistor Network: Two independent rheostats with 10 kΩ nominal resistance and 7-bit (129-step) resolution.
• Non-Volatile Memory: EEPROM retains wiper settings upon power loss, supported by WiperLock™ technology for security.
• SPI Interface: High-speed serial communication up to 10 MHz with modes 0,0 and 1,1 support.
• High-Voltage Tolerance: Digital input pins tolerate voltages up to 12.5V, enabling split-rail applications.

Digital Potentiometers Applications

• Industrial process control systems requiring adjustable gain or reference voltages.
• Audio equipment for digital volume control and tone adjustment.
• Test and measurement instruments needing programmable attenuation or calibration.
• Consumer electronics utilizing low-power digital potentiometry.

Digital Potentiometers Procurement Notes

Verify the specific suffix 'MF' against official documentation to confirm package type and tape/reel specifications. Ensure compatibility with standard SPI protocols and check for any regional compliance certifications required for the target market.

Digital Potentiometers Selection Notes

Select this component when dual-channel non-volatile adjustment is required. The 10 kΩ value suits moderate impedance circuits. Confirm that the 7-bit resolution meets the application's precision needs and that the 1.8V minimum operating voltage aligns with the system's power rails.

Digital Potentiometers Part Context

This part belongs to the MCP414X/416X/424X/426X family, which integrates non-volatile memory into single and dual resistor network devices. The '42' designation indicates a dual rheostat configuration, while '103' specifies the 10 kΩ resistance value. The 'T' suffix typically denotes tape and reel packaging.

Digital Potentiometers Replacement Considerations

Direct replacements within the same family include other MCP424X variants with different resistance values or resolutions. Cross-family alternatives like the MCP4231 offer similar functionality but with volatile memory only.