MCP4232T-103E/UN

Digital Potentiometers Overview

The MCP4232T-103E/UN is a dual-channel digital potentiometer IC manufactured by Microchip Technology. It features two independent rheostat configurations with 7-bit resolution, providing 129 discrete resistance steps. The nominal end-to-end resistance (R_AB) is 10 kΩ with a ±20% tolerance. The device operates on a supply voltage range of 1.8V to 5.5V and utilizes a standard SPI serial interface for control. It employs volatile memory to store wiper settings, which reset to mid-scale upon power-up.

Digital Potentiometers Feature Summary

• Dual resistor network with 7-bit resolution (129 taps) in rheostat configuration
• SPI serial interface supporting up to 10 MHz clock frequency
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V
• Wide operating voltage range from 1.8V to 5.5V

Digital Potentiometers Applications

• Programmable gain amplifiers
• Voltage reference trimming
• Audio volume control circuits
• Sensor bias adjustment

Digital Potentiometers Procurement Notes

Verify the specific suffix 'UN' corresponds to the MSOP-8 package when sourcing components. Confirm that the 'E' designation indicates an extended temperature range (-40°C to +125°C). Ensure the order quantity matches the manufacturer's reel packaging requirements.

Digital Potentiometers Selection Notes

Select this component over non-volatile variants if power-down retention is unnecessary. Verify that the 10 kΩ resistance value aligns with the target circuit impedance. Ensure the host microcontroller supports the required SPI modes (0,0 or 1,1) and voltage levels compatible with the 1.8V to 5.5V operating range.

Digital Potentiometers Part Context

This part belongs to the MCP413X/415X/423X/425X family of digital potentiometers. The '42' prefix denotes a dual-channel device, while '3' indicates 7-bit resolution. The 'T' suffix specifies tape-and-reel packaging, and 'UN' identifies the MSOP-8 package type.

Digital Potentiometers Replacement Considerations

Direct replacements within the same family include MCP4231T-103E/UN (potentiometer configuration) or MCP4252T-103E/UN (8-bit resolution). Cross-family substitutes require verification of pin compatibility and interface protocols.