MCP4021T-103E/MS

Overview

The MCP4021T-103E/MS is a nonvolatile, 6-bit digital potentiometer manufactured by Microchip Technology in an 8-pin MSOP package. It features a nominal resistance of 10 kΩ with 64 taps and utilizes a simple Up/Down (U/D) serial interface for wiper control. The device operates within a supply voltage range of 2.7V to 5.5V and includes WiperLock™ technology to secure settings in EEPROM without additional write-protect pins. It supports high-voltage tolerant digital inputs up to 12.5V and functions across an extended temperature range from -40°C to +125°C.

Feature Summary

• Nonvolatile memory with WiperLock™ technology for power-on recall of wiper settings
• Simple Up/Down (U/D) serial interface with CS pin control
• High-voltage tolerant digital inputs supporting up to 12.5V
• Low static current consumption of 1 µA maximum

Applications

• Audio volume control and tone adjustment
• Programmable gain amplifiers
• Voltage reference trimming
• Sensor biasing and calibration

Procurement Notes

Verify the specific suffix 'E/MS' corresponds to the MSOP-8 package and Extended Temperature Range (-40°C to +125°C). Confirm that the 'T' indicates tape and reel packaging if required for automated assembly. Ensure compatibility with the host system's U/D logic levels, noting the high-voltage tolerance feature.

Selection Notes

Select this component when a nonvolatile digital potentiometer with low pin count is required. The 10kΩ value suits moderate impedance applications. Consider the 64-tap resolution for coarse adjustments. Verify that the U/D interface fits the microcontroller's available GPIOs, as it does not use standard SPI or I2C protocols.

Part Context

This part belongs to the MCP4021/2/3/4 family of low-cost nonvolatile digital potentiometers. The MCP4021 variant specifically offers a potentiometer configuration, whereas other family members may offer rheostat modes. The T-103E/MS designation identifies the 10kΩ version in MSOP packaging with extended temperature rating.

Replacement Considerations

Direct replacements within the same family include MCP4021T-103E/MC (DFN package) or MCP4021-103E/MS (tube packaging). Cross-family alternatives like MCP41xxx require SPI interfaces and volatile memory, necessitating firmware changes.