MCP4661T-103E/ML

Digital Potentiometers Overview

The MCP4661T-103E/ML is a dual-channel digital potentiometer manufactured by Microchip Technology, housed in a QFN-16 (4x4 mm) package. It features two independent 8-bit resistor networks with 257 taps and a nominal resistance of 10 kΩ. The device utilizes an I²C serial interface supporting standard, fast, and high-speed modes. Key specifications include a typical wiper resistance of 75 Ω, nonvolatile memory for wiper settings, and operation across a supply voltage range of 2.7V to 5.5V.

Digital Potentiometers Feature Summary

• Dual 8-bit Potentiometer Configuration: Contains two independent resistor networks with 257 steps each.
• Nonvolatile Memory: Stores wiper positions using WiperLock™ technology for automatic recall upon power-up.
• I²C Interface: Supports 100 kHz, 400 kHz, and up to 3.4 MHz data rates.
• High-Voltage Tolerant Inputs: Digital inputs tolerate voltages up to 12.5V.

Digital Potentiometers Applications

• Audio volume control and tone adjustment circuits
• Programmable gain amplifiers and sensor biasing
• Voltage reference trimming and calibration

Digital Potentiometers Procurement Notes

Verify the specific suffix 'ML' corresponds to the QFN-16 package when sourcing. Confirm that the 'T' indicates tape-and-reel packaging if bulk quantities are required. Ensure the design supports the 2.7V minimum operating voltage for full analog specification compliance.

Digital Potentiometers Selection Notes

Select this model over volatile variants (e.g., MCP4651) when power-loss retention of the wiper position is critical. Choose the 10kΩ variant (-103) for impedance matching requirements. Verify that the QFN-16 footprint fits the PCB layout constraints compared to MSOP or TSSOP alternatives.

Digital Potentiometers Part Context

This component belongs to the MCP454X/456X/464X/466X family from Microchip Technology. It is specifically the dual-potentiometer version within the nonvolatile series, distinguished by its 8-bit resolution and I²C connectivity.

Digital Potentiometers Replacement Considerations

MCP4661-103E/ST (TSSOP-14 package)

Digital Potentiometers FAQ

What is the maximum frequency supported by the I²C interface?

The device supports High-Speed mode at up to 3.4 MHz, provided the bus capacitive loading is limited to 100 pF and VDD is between 4.5V and 5.5V.

How does the device handle power-up states?

Upon power-up, the device automatically recalls the last saved wiper setting from its nonvolatile EEPROM memory due to WiperLock™ technology.

What is the typical temperature coefficient for this device?

The absolute temperature coefficient is typically 50 ppm/°C between 0°C and 70°C, and 150 ppm/°C across the full -40°C to +125°C range.