MCP4632T-104E/UN

Digital Potentiometers Overview

The MCP4632T-104E/UN is a dual-channel digital potentiometer IC featuring volatile memory and an I²C serial interface. It provides two independent rheostat configurations with a total resistance (R_AB) of 100 kΩ and 7-bit resolution, offering 128 taps. The device operates within a supply voltage range of 2.7V to 5.5V for specified characteristics, or 1.8V to 5.5V for operation only. It supports I²C clock frequencies up to 3.4 MHz and includes high-voltage tolerant inputs capable of withstanding up to 12.5V.

Digital Potentiometers Feature Summary

• Dual resistor network with 100 kΩ resistance per channel
• 7-bit resolution providing 128 discrete wiper steps
• I²C serial interface supporting 100 kHz, 400 kHz, and 3.4 MHz modes
• High-voltage tolerant digital inputs up to 12.5V

Digital Potentiometers Applications

• Programmable gain amplifiers
• Variable voltage references
• Digital volume control in audio circuits

Digital Potentiometers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging and 'UN' denotes the MSOP-10 package. Confirm the 'E' suffix corresponds to the extended temperature grade (-40°C to +125°C). Ensure the order number matches the exact resistance value of 100 kΩ indicated by the '104' code.

Digital Potentiometers Selection Notes

Select this component when dual isolated variable resistors are required with I²C control. The 100 kΩ value suits low-current applications. Note that the memory is volatile; wiper settings are lost upon power loss. For non-volatile storage, consider the MCP4642 variant instead.

Digital Potentiometers Part Context

This part belongs to the MCP46XX family of dual digital potentiometers. It shares the same core architecture as the MCP4631 but differs in terminal configuration, operating as a dual rheostat rather than a dual potentiometer. It is part of the broader MCP45XX/MCP46XX series which includes single-channel and non-volatile variants.

Digital Potentiometers Replacement Considerations

• MCP4632-104E/ST
• MCP4632-104E/MF

Digital Potentiometers FAQ

Is the wiper setting retained after power cycling?

No, the MCP4632 uses volatile RAM. Wiper settings are reset to mid-scale or zero upon power-up unless reprogrammed.

What is the maximum voltage on the SDA and SCL pins?

The digital inputs, including SDA and SCL, are high-voltage tolerant and can withstand voltages up to 12.5V relative to VSS.

Can this device be used as a potentiometer?

The MCP4632 is configured as a dual rheostat. While terminals can be floated to mimic potentiometer behavior, it is natively designed for rheostat applications.