MCP4142-103E/MF

Digital Potentiometers Overview

The MCP4142-103E/MF is a single-channel digital rheostat manufactured by Microchip Technology. It features a 7-bit resolution providing 129 taps and a nominal resistance (RAB) of 10 kΩ with ±20% tolerance. The device utilizes non-volatile memory to retain wiper settings and supports an SPI serial interface operating up to 10 MHz. It operates within a supply voltage range of 2.7V to 5.5V, draws 450 µA during active operation, and functions across an extended temperature range from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Single-channel digital rheostat configuration with 10 kΩ nominal resistance
• Non-volatile memory with WiperLock™ technology for automatic recall of settings
• SPI serial interface supporting modes 0,0 and 1,1 at frequencies up to 10 MHz
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V

Digital Potentiometers Applications

• Programmable gain amplifiers
• Variable voltage references
• Digital potentiometer replacement in calibration circuits
• Audio volume control applications

Digital Potentiometers Procurement Notes

Verify the specific package marking and date code against the manufacturer's latest documentation. Confirm that the 'MF' suffix corresponds to the MSOP-8 package variant as defined in the official datasheet. Ensure compatibility with system voltage levels given the high-voltage tolerant input specifications.

Digital Potentiometers Selection Notes

Select this component when a single-channel variable resistor with persistent settings is required. The 10 kΩ value suits moderate impedance applications. Consider the 7-bit resolution if higher precision is not needed, or choose an 8-bit variant like the MCP4162 for finer adjustment steps.

Digital Potentiometers Part Context

This part belongs to the MCP414X family of single-channel SPI digital potentiometers. It shares architectural similarities with the MCP42X dual-channel series but offers only one resistor network. The '103' designation specifically indicates the 10 kΩ resistance value within the product line.

Digital Potentiometers Replacement Considerations

Direct functional replacements include other MCP4142 variants with different resistance values or packages, such as MCP4142-102E/MF (5 kΩ). Cross-family substitutes like the MCP4162 offer 8-bit resolution but maintain similar interface and memory characteristics.