MCP4632-502E/UN

Digital Potentiometers Overview

The MCP4632-502E/UN is a dual-channel digital potentiometer IC manufactured by Microchip Technology. It features two independent rheostat networks, each with a nominal resistance of 5 kΩ and 7-bit resolution providing 129 tap positions. The device utilizes an I²C serial interface for control and employs volatile memory to retain wiper settings during operation. It supports a wide operating voltage range from 1.8V to 5.5V and operates within an extended temperature range of -40°C to +125°C. Packaged in a 10-pin MSOP format, it includes high-voltage tolerant inputs up to 12.5V.

Digital Potentiometers Feature Summary

• Dual resistor network configuration with 5 kΩ nominal resistance per channel
• 7-bit resolution offering 129 discrete tap steps for precise adjustment
• I²C serial 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 dual-channel adjustment
• Voltage reference trimming circuits
• Audio volume control systems
• Sensor biasing and calibration networks

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and tape/reel specifications. Ensure compatibility with system voltage levels, particularly regarding the 1.8V minimum operational threshold versus the 2.7V specification threshold for analog characteristics. Confirm humidity sensitivity handling procedures are followed during assembly.

Digital Potentiometers Selection Notes

Select this component when a dual-rheostat configuration is required rather than a potentiometer setup. The 5 kΩ resistance value suits applications needing moderate current handling without excessive power dissipation. Verify that the system can accommodate volatile memory behavior, as wiper settings will reset upon power loss. Ensure the I²C bus speed requirements align with the supported 100 kHz to 3.4 MHz ranges.

Digital Potentiometers Part Context

This part belongs to the MCP45XX/MCP46XX family of digital potentiometers. The '46' designation indicates a dual-resistor network structure, while the '32' suffix specifies a 7-bit resolution with volatile memory and rheostat pinout. The '-502' code denotes the 5 kΩ resistance value, and '/UN' identifies the MSOP-10 package variant.

Digital Potentiometers Replacement Considerations

Direct replacements within the same family include other MCP4632 variants with different resistance values or packages. Cross-family substitution requires verifying interface compatibility and pinout alignment. Note that non-volatile memory versions like the MCP4642 offer different power-up behaviors.