MCP4632T-103E/MF

Digital Potentiometers Overview

The MCP4632T-103E/MF is a dual-channel digital potentiometer IC featuring two independent rheostat configurations with volatile memory. It provides 7-bit resolution, offering 128 discrete taps per channel. The nominal resistance between terminals A and B is 10 kΩ (indicated by the '103' suffix), with a tolerance of ±20%. The device operates on an I²C serial interface supporting standard, fast, and high-speed modes up to 3.4 MHz. Electrical specifications include a typical wiper resistance of 75 Ω and a supply voltage range of 1.8 V to 5.5 V for operation, with analog characteristics specified from 2.7 V to 5.5 V.

Digital Potentiometers Feature Summary

• Dual resistor network with 7-bit (129-step) resolution in rheostat configuration
• I²C serial interface supporting 100 kHz, 400 kHz, and 3.4 MHz clock speeds
• High-voltage tolerant digital inputs (HVC/A0 pin) up to 12.5 V
• Volatile RAM storage for wiper settings with terminal disconnect capability via TCON register

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise resistance adjustment
• Voltage reference trimming and calibration circuits
• Audio volume control or equalization using variable resistive dividers
• Sensor biasing and offset adjustment in instrumentation systems

Digital Potentiometers Procurement Notes

Verify the package marking and datasheet revision when sourcing. The 'MF' suffix denotes the DFN-8 (3x3 mm) package with an exposed thermal pad. Confirm that the specific order code matches the required 10 kΩ resistance value ('103') and the dual rheostat topology ('632'). Ensure compatibility with the target I²C bus speed and voltage levels.

Digital Potentiometers Selection Notes

Select this component when a dual-channel variable resistor is needed without non-volatile storage requirements. The 7-bit resolution provides 128 steps, which may be insufficient for applications requiring finer granularity compared to 8-bit variants like the MCP4652. Verify that the 10 kΩ nominal resistance fits the circuit's impedance constraints and that the 75 Ω wiper resistance does not introduce excessive error in low-current applications.

Digital Potentiometers Part Context

This part belongs to the MCP45XX/46XX family of digital potentiometers manufactured by Microchip Technology. The 'MCP46' prefix indicates a dual-potentiometer/rheostat device, while the '32' suffix specifies 7-bit resolution and rheostat configuration. The 'T' indicates tape and reel packaging, and 'MF' identifies the DFN-8 (3x3 mm) package type.

Digital Potentiometers Replacement Considerations

Direct functional replacements within the same family include the MCP4631T-103E/MF (single channel) or MCP4652T-103E/MF (dual channel, 8-bit resolution). Cross-family replacements such as the MCP4132 series require SPI interface adaptation. Verify pinout compatibility, particularly the HVC/A0 pin function, when substituting devices.