MCP4631T-503E/ML

Digital Potentiometers Overview

The MCP4631T-503E/ML is a dual 7-bit digital potentiometer IC manufactured by Microchip Technology. It features an I2C serial interface and volatile memory configuration. The device provides two independent resistor networks with 129 taps each, supporting RAB resistance options of 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ. Operating voltage ranges from 1.8V to 5.5V for device operation, with analog characteristics specified from 2.7V to 5.5V. It includes high-voltage tolerant inputs up to 12.5V, low wiper resistance (typical 75 Ω), and supports I2C speeds of 100 kHz, 400 kHz, and 3.4 MHz.

Digital Potentiometers Feature Summary

• Dual 7-bit resistor network with 129 steps per channel
• I2C serial interface supporting 100 kHz, 400 kHz, and 3.4 MHz modes
• High-voltage tolerant digital inputs up to 12.5V
• Wide operating voltage range: 1.8V to 5.5V

Digital Potentiometers Applications

• Programmable gain amplifiers
• Voltage reference adjustment
• Digital volume control in audio systems

Digital Potentiometers Procurement Notes

Verify the ML suffix indicates the QFN-16 package type when sourcing. Confirm the 'T' suffix denotes tape and reel packaging if required for automated assembly. Ensure the -503 code matches the required 50 kΩ resistance value for the specific application design.

Digital Potentiometers Selection Notes

Select this component for applications requiring two independent digitally controlled resistors with I2C connectivity. The 7-bit resolution offers 129 steps, suitable for moderate precision adjustments. Consider the volatile memory nature; wiper settings are lost upon power cycle unless saved externally or re-initialized at startup.

Digital Potentiometers Part Context

This part belongs to the MCP45XX/MCP46XX family of single and dual I2C digital potentiometers. The MCP4631 specifically denotes the dual potentiometer variant with 7-bit resolution and volatile RAM. It complements non-volatile EEPROM versions like the MCP4641 and higher-resolution 8-bit models like the MCP4651.

Digital Potentiometers Replacement Considerations

MCP4631-503E/ST (TSSOP-14 package)

Digital Potentiometers FAQ

What is the maximum voltage tolerance for the digital input pins?

The HVC/A0, A1, A2, SCL, and SDA pins are high-voltage tolerant up to 12.5V.

Does the MCP4631 retain its wiper setting after power loss?

No, it uses volatile RAM. Wiper settings are reset to mid-scale upon power-up or brown-out reset.

What is the typical wiper resistance?

The typical wiper resistance is 75 Ω.