MCP4242T-104E/UN

Digital Potentiometers Overview

The MCP4242T-104E/UN is a dual-channel digital potentiometer IC featuring non-volatile memory and WiperLock™ technology. It provides two independent rheostat networks with 100 kΩ total resistance (R_AB) and 7-bit resolution, offering 128 discrete steps. The device operates on a single supply voltage ranging from 2.7V to 5.5V, with serial interface logic tolerant up to 12.5V. Key electrical parameters include a typical wiper resistance of 75 Ω, an operating temperature range of -40°C to +125°C, and a maximum SPI clock frequency of 10 MHz.

Digital Potentiometers Feature Summary

• Dual Resistor Network: Contains two independent 100 kΩ rheostats with 7-bit (129-step) resolution.
• Non-Volatile Memory: Stores wiper settings in Data EEPROM with automatic recall upon power-up.
• High-Voltage Inputs: Digital control pins (CS, SCK, SDI) tolerate voltages up to 12.5V.
• WiperLock Technology: Allows calibration settings to be secured in the EEPROM.

Digital Potentiometers Applications

• Industrial process control systems requiring adjustable gain or reference voltages.
• Audio equipment for digital volume control and tone adjustment.
• Test and measurement instrumentation for programmable attenuation.

Digital Potentiometers Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging and the 'UN' suffix specifies the MSOP-10 package. Confirm the '104' code corresponds to the 100 kΩ resistance value. Ensure the 'E' suffix meets RoHS compliance requirements for the target market.

Digital Potentiometers Selection Notes

Select this model when dual isolated variable resistors are required. The 100 kΩ value suits low-current applications. Use the 7-bit resolution if 128 steps provide sufficient granularity. Consider the high-voltage tolerant inputs if interfacing with 5V logic while the analog section operates at lower voltages.

Digital Potentiometers Part Context

This component belongs to the MCP414X/424X family of SPI-controlled digital potentiometers. It is part of a broader series that includes single-potentiometer variants (MCP414X) and higher-resolution 8-bit models (MCP426X). The dual-rheostat configuration distinguishes it from potentiometer-only versions.

Digital Potentiometers Replacement Considerations

Direct substitutes within the same family include MCP4242-104E/SL (SOIC-14 package) or MCP4242-104E/MF (DFN package). Verify pin compatibility and thermal characteristics when changing packages.