MCP4561T-104E/MS

Digital Potentiometers Overview

The MCP4561T-104E/MS is a single-channel nonvolatile digital potentiometer from Microchip Technology, housed in an 8-pin MSOP package. It features a 100 kΩ resistor network with 257 taps (8-bit resolution) and operates on a supply voltage of 2.7V to 5.5V. The device utilizes an I²C serial interface supporting standard, fast, and high-speed modes. Key specifications include a typical wiper resistance of 75 Ω, low temperature coefficients, and WiperLock™ technology for securing calibration settings in EEPROM.

Digital Potentiometers Feature Summary

• Nonvolatile Memory: Stores wiper settings in EEPROM with automatic recall upon power-up.
• I²C Interface: Supports 100 kHz, 400 kHz, and up to 3.4 MHz High-Speed mode.
• WiperLock™ Technology: Allows specific calibration data to be permanently secured against modification.
• High-Voltage Inputs: Digital inputs tolerate voltages up to 12.5V.

Digital Potentiometers Applications

• Audio volume control and tone adjustment
• Programmable gain amplifiers
• Voltage reference trimming
• Sensor biasing and offset adjustment

Digital Potentiometers Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging and '/MS' confirms the MSOP-8 package. Confirm the '-104' code corresponds to the 100 kΩ resistance value. Ensure the component meets the required operating temperature range of -40°C to +125°C for your specific application environment.

Digital Potentiometers Selection Notes

Select this model for applications requiring persistent resistance settings without external memory. Choose the 100 kΩ variant if higher impedance is needed; lower values like 10 kΩ offer better bandwidth. Ensure the system I²C clock speed does not exceed the limits defined for the chosen VDD level.

Digital Potentiometers Part Context

This part belongs to the MCP456X family of 8-bit nonvolatile digital potentiometers. It shares the same core architecture as the MCP4562 but differs in pinout configuration, offering a Potentiometer setup instead of a Rheostat setup.

Digital Potentiometers Replacement Considerations

Direct functional substitutes within the same package include other MCP4561 variants with different resistance codes (e.g., MCP4561-103E/MS for 10 kΩ). Cross-family replacements like the MCP4541 are volatile-only and lack nonvolatile storage.

Digital Potentiometers FAQ

What is the maximum I²C clock frequency?

The device supports Standard Mode (100 kHz), Fast Mode (400 kHz), and High-Speed Mode (up to 3.4 MHz), depending on the bus capacitance and supply voltage conditions.

How does WiperLock™ work?

WiperLock™ allows the user to write a specific wiper setting to one of the 10 general-purpose EEPROM locations and lock it, preventing further changes to that specific calibration data.

What is the typical wiper resistance?

The typical wiper resistance (RW) is 75 Ω at VDD = 5.5V.