MCP4632T-503E/UN

Digital Potentiometers Overview

The MCP4632T-503E/UN is a dual-channel digital potentiometer IC featuring volatile memory and an I2C serial interface. It provides two independent rheostat configurations with a nominal resistance (RAB) of 50 kΩ and 7-bit resolution, offering 128 taps. The device operates within a supply voltage range of 1.8V to 5.5V and supports I2C clock frequencies up to 3.4 MHz. Key electrical characteristics include a typical wiper resistance of 75 Ω, a low temperature coefficient of 50 ppm/°C for absolute resistance, and high-voltage tolerant digital inputs capable of withstanding up to 12.5V.

Digital Potentiometers Feature Summary

• Dual resistor network with 7-bit resolution (128 taps) in a rheostat configuration
• I2C serial interface supporting 100 kHz, 400 kHz, and 3.4 MHz speeds
• High-voltage tolerant digital inputs (HVC/A0 pin) up to 12.5V
• Wide operating voltage range from 1.8V to 5.5V

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise resistance adjustment
• Voltage reference trimming in measurement systems
• Audio volume control circuits using variable attenuation
• Sensor bias current adjustment in industrial instrumentation

Digital Potentiometers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging and 'UN' denotes the MSOP-10 package. Confirm that the '503' code corresponds to the 50 kΩ resistance value. Ensure the volatile memory type aligns with system requirements, as settings are lost upon power loss. Check for AEC-Q100 qualification if automotive compliance is required.

Digital Potentiometers Selection Notes

Select this model when dual independent variable resistors are needed with I2C control. The 50 kΩ resistance value suits moderate impedance applications. Consider the 7-bit resolution for cost-sensitive designs where 128 steps are sufficient. Verify that the volatile memory behavior is acceptable for the application, or choose a non-volatile variant like the MCP4642 if data retention across power cycles is necessary.

Digital Potentiometers Part Context

This component belongs to the MCP45XX/MCP46XX family of digital potentiometers manufactured by Microchip Technology. The '46' prefix identifies it as a dual-channel device, while the '3' indicates 7-bit resolution and volatile memory. The '2' suffix specifies the rheostat pinout configuration. It shares the same core architecture and interface protocols as other members of the DS22096B series.

Digital Potentiometers Replacement Considerations

Direct functional substitutes within the same family include the MCP4632-503E/UN (tube packaging) or MCP4632-503E/MS (SOIC-8 package). For single-channel applications, the MCP4532 series may be considered. Non-volatile alternatives such as the MCP4642 offer similar electrical performance but retain wiper settings after power loss.