MCP4561T-103E/MF

Digital Potentiometers Overview

The MCP4561T-103E/MF is a single-channel, nonvolatile digital potentiometer from Microchip Technology. It features an I2C serial interface and provides 257 discrete taps for precise resistance adjustment. The device operates within a supply voltage range of 2.7V to 5.5V, with the serial interface functional down to 1.8V. It utilizes a DFN 3x3 (MF) package with an exposed thermal pad. Key specifications include a nominal resistance of 10 kΩ, a typical wiper resistance of 75 Ω, and high-voltage tolerant digital inputs up to 12.5V.

Digital Potentiometers Feature Summary

• Nonvolatile Memory: Stores wiper settings in EEPROM with WiperLock™ technology for secure calibration data retention.
• I2C Interface: Supports standard (100 kHz), fast (400 kHz), and high-speed modes (up to 3.4 MHz).
• High-Voltage Tolerance: Digital input pins tolerate voltages up to 12.5V, allowing operation with higher logic levels.
• Low Power Consumption: Typical inactive current is 2.5 µA; extended operating temperature range from -40°C to +125°C.

Digital Potentiometers Applications

• System calibration and gain control in instrumentation.
• Audio volume and tone control circuits.
• Variable reference voltage generation.
• Programmable biasing for analog sensors.

Digital Potentiometers Procurement Notes

Verify the ordering suffix 'MF' corresponds to the DFN 3x3 package with an exposed thermal pad. Confirm the '103' code indicates a 10 kΩ resistance value. Ensure the 'T' designation matches the required reel packaging format for surface-mount assembly processes.

Digital Potentiometers Selection Notes

Select this component when a single-channel, nonvolatile digital potentiometer is required. The 10 kΩ resistance value suits moderate impedance applications. Verify that the I2C bus speed requirements align with the device's support for up to 3.4 MHz. Consider the DFN package size constraints and thermal dissipation needs associated with the exposed pad.

Digital Potentiometers Part Context

This part belongs to the MCP45XX family of digital potentiometers. The '61' designation identifies it as a single-potentiometer configuration with nonvolatile memory. It differs from volatile variants like the MCP4551 and dual-channel versions like the MCP4661. The 'T' suffix typically denotes tape-and-reel packaging for automated manufacturing.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same family include MCP4561T-103E/MS (MSOP-8 package) or MCP4561T-103E/ML (QFN-16 package). Cross-family substitutes require verification of interface compatibility and memory type.