MCP4641T-502E/ST

Digital Potentiometers Overview

The MCP4641T-502E/ST is a dual-channel digital potentiometer IC from Microchip Technology, housed in a 14-TSSOP package. It features two independent 7-bit resistor networks with 129 taps and a nominal resistance (R_AB) of 5 kΩ. The device utilizes an I²C serial interface for control and includes nonvolatile memory to retain wiper settings after power loss. Operating voltage ranges from 1.8V to 5.5V, with full analog specifications guaranteed between 2.7V and 5.5V across the -40°C to +125°C temperature range.

Digital Potentiometers Feature Summary

• Dual-channel architecture with 7-bit resolution (129 steps) per channel
• Nonvolatile EEPROM memory retains wiper positions upon power cycle
• I²C interface supporting Standard (100 kHz), Fast (400 kHz), and High-Speed modes
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise gain adjustment
• Voltage reference trimming and calibration circuits
• Digital volume control in audio signal processing chains
• Sensor biasing and offset nulling applications

Digital Potentiometers Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging when sourcing components. Confirm the '502' code corresponds to the specific 5 kΩ resistance value required for the design. Ensure the ST package designation matches the 14-TSSOP footprint on the target PCB layout.

Digital Potentiometers Selection Notes

Select this model over volatile variants if circuit continuity of the resistance setting is required during power interruptions. Verify that the system's I²C bus speed does not exceed the limits defined for the chosen supply voltage, particularly when operating above 4.5V for high-speed modes.

Digital Potentiometers Part Context

This component belongs to the MCP454X/456X/464X/466X family of digital potentiometers. It shares core architectural features with single-channel counterparts like the MCP4541 but provides dual channels within a compact 14-pin form factor, optimizing board space for multi-rail or stereo applications.

Digital Potentiometers Replacement Considerations

Direct functional replacements include other MCP4641 variants with different resistance codes (e.g., -103 for 10 kΩ) or packages. Cross-family substitution requires verifying pin compatibility and interface protocols against devices such as the MCP4651.