MCP4661T-503E/ML

Digital Potentiometers Overview

The MCP4661T-503E/ML is a dual-channel, 8-bit nonvolatile digital potentiometer manufactured by Microchip Technology. It features two independent resistor networks with a nominal resistance (R_AB) of 50 kΩ and 257 wiper positions. The device utilizes an I²C serial interface for communication and includes nonvolatile memory to automatically recall saved wiper settings upon power-up. It operates within a supply voltage range of 2.7V to 5.5V and supports extended industrial temperature ranges from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual 8-bit Potentiometer Configuration: Contains two independent 50 kΩ resistor networks with 257 steps.
• Nonvolatile Memory: Stores wiper settings in EEPROM for automatic recall after power loss.
• I²C Interface: Supports Standard (100 kHz), Fast (400 kHz), and High-Speed (up to 3.4 MHz) modes.
• High-Voltage Tolerant Inputs: Digital inputs tolerate up to 12.5V, allowing operation with higher voltage logic levels.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise gain adjustment
• Voltage reference trimming and calibration circuits
• Audio volume control systems
• Sensor biasing and offset adjustment

Digital Potentiometers Procurement Notes

Verify the specific suffix 'ML' corresponds to the QFN-16 package when sourcing components. Confirm that the 'T' designation indicates tape and reel packaging if bulk quantities are required. Ensure the ordering part number matches the exact resistance value and channel count specified in the design requirements.

Digital Potentiometers Selection Notes

Select this component for applications requiring dual-channel precision resistance control with data retention. The 50 kΩ resistance value is suitable for moderate current applications. Consider the 75 Ω typical wiper resistance when calculating signal path accuracy. Verify I²C bus speed compatibility with the host microcontroller.

Digital Potentiometers Part Context

This device belongs to the MCP45XX/MCP46XX family of digital potentiometers. The 'MCP4661' base model denotes a dual-potentiometer variant with nonvolatile memory. The '503' code specifies the 50 kΩ resistance value, while 'E' indicates RoHS compliance. The '/ML' suffix identifies the 16-pin QFN package type.

Digital Potentiometers Replacement Considerations

Compatible substitutes within the same family include MCP4661-503E/ST (TSSOP-14) or MCP4661-503E/UN (MSOP-10). These alternatives offer identical electrical characteristics but differ in physical footprint and pinout configuration. Ensure mechanical clearance and PCB layout accommodate the specific package type selected.