MCP4662T-104E/UN

Digital Potentiometers Overview

The MCP4662T-104E/UN is a dual digital potentiometer IC from Microchip Technology, featuring two independent rheostat configurations with nonvolatile memory. It provides 8-bit resolution (257 taps) and a nominal resistance of 100 kΩ. The device operates on an I²C serial interface supporting standard, fast, and high-speed modes. Key features include WiperLock™ technology for securing calibration settings in EEPROM, hardware write protection via the WP pin, and high-voltage tolerant inputs up to 12.5V. It functions within a supply voltage range of 2.7V to 5.5V and supports an extended temperature range of -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual 8-bit Digital Potentiometers: Two independent rheostats with 257 taps and 100 kΩ nominal resistance.
• Nonvolatile Memory: Includes EEPROM for wiper settings and 10 general-purpose memory locations with WiperLock™ security.
• I²C Interface: Supports 100 kHz, 400 kHz, and 3.4 MHz clock speeds with hardware and software write protect options.
• High-Voltage Tolerance: Digital inputs tolerate voltages up to 12.5V, allowing compatibility with higher voltage logic levels.

Digital Potentiometers Applications

• Industrial process control systems requiring precise analog signal adjustment.
• Audio equipment for digital volume or tone control applications.
• Test and measurement instruments needing programmable gain or attenuation.
• Automotive electronics operating in extended temperature environments.

Digital Potentiometers Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging and the 'UN' suffix denotes the MSOP-10 package. Confirm the '104' code corresponds to the 100 kΩ resistance value. Ensure the specific revision matches the required I²C speed and memory endurance specifications for the target application environment.

Digital Potentiometers Selection Notes

Select this component when dual isolated variable resistors are needed with persistent state retention after power loss. Compare against volatile variants like the MCP4632 if power-down data retention is not required. Consider the MCP4661 if potentiometer configuration (three-terminal) is preferred over rheostat (two-terminal). Verify that the 100 kΩ resistance aligns with the circuit's current and bandwidth requirements.

Digital Potentiometers Part Context

This part belongs to the MCP45XX/MCP46XX family of I²C digital potentiometers. It shares the same core architecture as the MCP4662 but differs in packaging ('UN' for MSOP) and shipping format ('T' for reel). It complements single-potentiometer models like the MCP4661 and volatile counterparts like the MCP4632 within the Microchip portfolio.

Digital Potentiometers Replacement Considerations

Direct functional substitutes include other MCP4662 variants with different packages (e.g., MCP4662-104E/MF for DFN). For pin-compatible replacements, verify package dimensions and thermal pad requirements. Cross-reference with MCP4661 if potentiometer mode is acceptable instead of rheostat.