MCP4442T-103E/ST

Digital Potentiometers Overview

The MCP4442T-103E/ST is a quad rheostat digital potentiometer IC manufactured by Microchip Technology. It features four independent resistor networks with 10 kΩ nominal resistance (±20% tolerance) and 7-bit resolution, providing 129 taps. The device utilizes an I²C serial interface supporting 100 kHz, 400 kHz, and 3.4 MHz speeds. It includes nonvolatile memory for wiper settings and five general-purpose EEPROM locations. Operating voltage ranges from 2.7V to 5.5V for specified characteristics, with operation down to 1.8V. The package is TSSOP-14.

Digital Potentiometers Feature Summary

• Quad Rheostat Configuration: Four independent variable resistors with 10 kΩ nominal resistance and 129 taps.
• Nonvolatile Memory: Retains wiper settings via WiperLock™ technology and provides five user-programmable EEPROM locations.
• High-Speed I²C Interface: Supports standard (100 kHz), fast (400 kHz), and high-speed (up to 3.4 MHz) modes.
• High-Voltage Tolerant Inputs: Digital inputs tolerate up to 12.5V, enabling compatibility with higher voltage logic systems.

Digital Potentiometers Applications

• Audio volume control and tone adjustment circuits
• Programmable gain amplifiers and sensor signal conditioning
• Voltage reference trimming and calibration
• LCD bias voltage generation

Digital Potentiometers Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging when ordering. Confirm the '103' code corresponds to the 10 kΩ resistance value. Ensure the 'E' suffix meets RoHS compliance requirements. Check the datasheet for specific humidity sensitivity levels and storage conditions prior to assembly.

Digital Potentiometers Selection Notes

Select this model for applications requiring four independent variable resistors controlled via I²C. Choose the 10 kΩ variant if the circuit impedance matches this range. Consider the MCP4441 if potentiometer configuration is needed instead of rheostat. Verify that the 7-bit resolution (129 steps) is sufficient for the required precision.

Digital Potentiometers Part Context

This component belongs to the MCP444X/446X family of 7/8-bit quad I²C digital potentiometers. The MCP4442 specifically denotes the quad rheostat version with nonvolatile memory. It shares the same pinout and interface as the MCP4441 (potentiometer) but differs in terminal connectivity options.

Digital Potentiometers Replacement Considerations

The MCP4441-103E/ST is a direct functional substitute if potentiometer configuration is acceptable. For 8-bit resolution, consider the MCP4462-103E/ST. Volatile alternatives include the MCP4432-103E/ST.