MCP4142-104E/SN

Digital Potentiometers Overview

The MCP4142-104E/SN is a single-channel digital rheostat manufactured by Microchip Technology. It features a 7-bit resolution providing 129 discrete resistance steps and a nominal terminal-to-terminal resistance of 100 kΩ. The device operates on a supply voltage ranging from 2.7V to 5.5V, with serial interface functionality supported down to 1.8V. Key specifications include a typical wiper resistance of 75 Ω, an extended operating temperature range of -40°C to +125°C, and non-volatile memory for retaining wiper settings. It utilizes a standard SPI interface for control.

Digital Potentiometers Feature Summary

• Single-channel digital rheostat configuration with 100 kΩ nominal resistance
• Non-volatile EEPROM memory with WiperLock™ technology for power-off retention
• High-voltage tolerant digital inputs (up to 12.5V) supporting split-rail applications
• SPI serial interface compatible with modes 0,0 and 1,1

Digital Potentiometers Applications

• Gain adjustment in instrumentation amplifiers
• Voltage reference trimming
• Programmable gain amplifier circuits
• Sensor biasing and calibration

Digital Potentiometers Procurement Notes

Verify the specific suffix 'SN' corresponds to the SOIC-8 package when sourcing components. Confirm that the 'E' designation indicates compliance with RoHS standards and halogen-free manufacturing requirements as specified by the manufacturer.

Digital Potentiometers Selection Notes

Select this model for applications requiring a variable resistor rather than a three-terminal potentiometer. Ensure the system voltage remains within the 2.7V to 5.5V range for full analog performance. Consider the 100 kΩ resistance value against circuit impedance requirements to minimize loading effects.

Digital Potentiometers Part Context

This component belongs to the MCP414X family of single-channel digital potentiometers featuring non-volatile memory. It shares architectural similarities with volatile variants like the MCP413X but includes EEPROM for persistent storage. The part number suffix '104' specifically denotes the 100 kΩ resistance value.

Digital Potentiometers Replacement Considerations

Direct functional replacements within the same family include the MCP4141-104E/SN if potentiometer configuration is required instead of rheostat. For higher resolution needs, the MCP4162-104E/SN offers 8-bit (257-step) resolution.