MCP4542T-502E/MS

Digital Potentiometers Overview

The MCP4542T-502E/MS is a single-channel digital rheostat manufactured by Microchip Technology. It features a 7-bit resolution providing 129 discrete taps and a nominal resistance of 10 kΩ (±20%). The device utilizes an I²C serial interface for control and includes nonvolatile memory to retain wiper settings after power loss. Operating voltage ranges from 2.7V to 5.5V, with extended operation down to 1.8V for the serial interface only. It supports standard, fast, and high-speed I²C modes.

Digital Potentiometers Feature Summary

• Single Rheostat Configuration with 10 kΩ Nominal Resistance
• 7-Bit Resolution Offering 129 Discrete Taps
• Nonvolatile Memory with Automatic Recall of Wiper Setting
• I²C Serial Interface Supporting 100 kHz, 400 kHz, and 3.4 MHz

Digital Potentiometers Applications

• Variable Gain Amplifier Control
• Voltage Reference Adjustment
• Sensor Biasing Networks
• Audio Volume Control Circuits

Digital Potentiometers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging and 'E' denotes lead-free/RoHS compliance. Confirm the '502' code corresponds to the 10 kΩ resistance value. Ensure the 'MS' package designation matches the required MSOP-8 footprint for PCB layout compatibility.

Digital Potentiometers Selection Notes

Select this model over potentiometer variants (e.g., MCP4541) when a two-terminal variable resistor configuration is required. The 7-bit resolution provides 129 steps; choose higher-resolution models if finer adjustment granularity is necessary. Verify that the 10 kΩ resistance aligns with the target circuit impedance requirements.

Digital Potentiometers Part Context

This component belongs to the MCP454X family of single-channel digital potentiometers. The '42' designation specifically identifies it as a rheostat (two-terminal variable resistor) rather than a potentiometer (three-terminal). It shares the same I²C control logic and nonvolatile memory architecture as other members of the MCP454X series.

Digital Potentiometers Replacement Considerations

MCP4542T-503E/MS: Identical form factor and functionality but with 50 kΩ resistance. MCP4541T-502E/MS: Same resistance and resolution but configured as a potentiometer (three-terminal). MCP4562T-502E/MS: Higher resolution (8-bit, 257 taps) with identical resistance and package.