MCP4024T-103E/OT

Overview

The MCP4024T-103E/OT is a nonvolatile, single-channel digital potentiometer IC manufactured by Microchip Technology. It features a 10 kΩ resistance value with 6-bit resolution, providing 64 taps for precise adjustment. The device operates on a simple Up/Down (U/D) serial interface and includes WiperLock™ technology to secure settings in internal EEPROM without an external write-protect pin. Designed for rheostat configurations, it supports a supply voltage range of 2.7V to 5.5V and high-voltage tolerant digital inputs up to 12.5V. The component is housed in a compact SOT-23-5 package and functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• Nonvolatile memory with WiperLock™ technology secures wiper settings in EEPROM upon power-down.
• Simple 2-wire Up/Down (U/D) serial control interface for incrementing or decrementing resistance.
• High-voltage tolerant digital inputs allow operation with logic levels up to 12.5V.
• Low static current consumption of 1 µA maximum when the serial interface is inactive.

Applications

• Audio volume control circuits requiring persistent level settings.
• Variable gain amplifier adjustments in instrumentation systems.
• Calibration of sensor offsets where nonvolatile configuration is necessary.
• Voltage reference trimming in embedded hardware designs.

Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature grade (-40°C to +125°C) and 'OT' denotes the SOT-23-5 surface-mount package. Confirm that the '103' code corresponds to the 10 kΩ nominal resistance value. Ensure the application design accounts for the rheostat-only pinout configuration inherent to the MCP4024 model variant.

Selection Notes

Select this component when a single-channel, nonvolatile digital resistor is required with minimal pin count. The U/D interface is suitable for microcontrollers lacking SPI or I2C resources. Consider the 10 kΩ value against circuit impedance requirements, as bandwidth decreases with higher resistance values. Verify that the 12.5V input tolerance matches the controlling logic voltage levels.

Part Context

This part belongs to the MCP402x family of low-cost digital potentiometers. Unlike the MCP4021 and MCP4023 which support potentiometer configurations, the MCP4024 is specifically designed for rheostat applications. It shares the same core architecture and WiperLock™ technology as its siblings but differs in terminal connectivity and intended usage mode.

Replacement Considerations

Direct functional replacements within the same family include the MCP4021T-103E/OT and MCP4023T-103E/OT, provided the circuit can accommodate their potentiometer pinouts. Other Microchip series such as the MCP41xxx require SPI interfaces and are not pin-compatible substitutes.