MCP4542T-503E/MF

Digital Potentiometers Overview

The MCP4542T-503E/MF is a single-channel digital rheostat manufactured by Microchip Technology. It features a 7-bit resolution with 128 taps and a nominal resistance (R_AB) of 50 kΩ. The device utilizes an I²C serial interface for control and includes nonvolatile memory to retain wiper settings after power loss. It operates within a supply voltage range of 1.8V to 5.5V and supports extended industrial temperatures from -40°C to +125°C. The component is housed in an 8-pin DFN 3x3 package.

Digital Potentiometers Feature Summary

• Nonvolatile Memory: Stores wiper settings automatically; supports WiperLock™ technology.
• I²C Interface: Supports Standard (100 kHz), Fast (400 kHz), and High-Speed modes up to 3.4 MHz.
• High-Voltage Tolerant Inputs: Digital inputs tolerate voltages up to 12.5V.
• Terminal Disconnect: Allows resistor network terminals to be disconnected via the TCON register.

Digital Potentiometers Applications

• Calibration of sensor circuits requiring stable, nonvolatile gain settings.
• Programmable attenuation in signal conditioning paths.
• Adjustable reference voltage generation in measurement systems.

Digital Potentiometers Procurement Notes

Verify the specific suffix 'MF' corresponds to the 8-DFN (3x3) package with an exposed thermal pad as documented in the datasheet. Confirm that the '503' code correctly specifies the 50 kΩ resistance value. Ensure the design accounts for the high-voltage tolerant nature of the HVC/A0 pin if interfacing with higher voltage logic levels.

Digital Potentiometers Selection Notes

Select this model over potentiometer variants (e.g., MCP4541) when a variable resistor configuration is required rather than a three-terminal voltage divider. Consider the 7-bit resolution (129 steps) sufficient for the application's precision needs compared to 8-bit options. Verify that the 50 kΩ resistance aligns with the target circuit impedance requirements.

Digital Potentiometers Part Context

This part belongs to the MCP454X family of single-channel digital potentiometers with nonvolatile memory. The '42' designation indicates a Rheostat configuration, while '503' denotes the 50 kΩ resistance value. The 'MF' suffix identifies the specific 8-lead DFN package type used in this component.

Digital Potentiometers Replacement Considerations

MCP4542T-503E/MS: Same electrical specifications but in an MSOP-8 package. MCP4542T-103E/MF: Identical package and features but with a 10 kΩ resistance value. MCP4542T-503E/ML: Identical electrical specifications but in a QFN-16 package.