MCP4661T-104E/ML

Digital Potentiometers Overview

The MCP4661T-104E/ML is a dual-channel digital potentiometer featuring nonvolatile memory and an I2C serial interface. It provides two independent resistor networks with 8-bit resolution, offering 257 discrete taps for precise adjustment. The nominal resistance between terminals A and B is 100 kΩ, with a typical wiper resistance of 75 Ω. Operating on a single supply voltage ranging from 1.8 V to 5.5 V, the device supports standard, fast, and high-speed I2C modes up to 3.4 MHz. It includes WiperLock™ technology for securing calibration settings in EEPROM and operates within an extended temperature range of -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual resistor network configuration with 8-bit (257 tap) resolution
• Nonvolatile memory with WiperLock™ technology for secure calibration storage
• I2C serial interface supporting 100 kHz, 400 kHz, and 3.4 MHz speeds
• High-voltage tolerant digital inputs capable of withstanding up to 12.5 V

Digital Potentiometers Applications

• Audio volume control and tone adjustment circuits
• Programmable gain amplifier biasing
• Sensor signal conditioning and offset trimming
• Industrial process control loop tuning

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix 'T' indicates tape and reel packaging when sourcing components. Confirm that the '104' designation corresponds to the required 100 kΩ resistance value for the application. Ensure the QFN-16 package dimensions align with the PCB footprint requirements. Check for RoHS compliance status if environmental regulations apply to the manufacturing process.

Digital Potentiometers Selection Notes

Select this component when dual-channel precision resistance adjustment is required without mechanical wear. The 100 kΩ resistance value suits applications requiring moderate current handling. Consider the 75 Ω typical wiper resistance for voltage drop calculations. Verify that the I2C address pins are configured correctly to avoid bus conflicts in multi-device systems.

Digital Potentiometers Part Context

This device belongs to the MCP45XX/MCP46XX family of digital potentiometers manufactured by Microchip Technology. The MCP4661 variant specifically offers dual channels, distinguishing it from single-channel models like the MCP4561. The 'T' suffix denotes a specific packaging format, while '104' specifies the resistance value. The 'ML' suffix identifies the QFN-16 package type.

Digital Potentiometers Replacement Considerations

Direct replacements include other MCP4661 variants with different resistance values or packages, such as MCP4661-503E/ML for 10 kΩ. Single-channel equivalents like MCP4561 may be used if only one channel is needed. Ensure any substitute maintains the same I2C protocol compatibility and nonvolatile memory features.