MCP4021-103E/MS

Overview

The MCP4021-103E/MS is a single-channel, nonvolatile digital potentiometer with a nominal resistance of 10 kΩ. It features 6-bit resolution providing 64 taps and operates on a supply voltage range of 2.7V to 5.5V. The device utilizes a simple Up/Down (U/D) serial interface for wiper control and incorporates WiperLock technology to store settings in EEPROM without external write-protection pins. It supports high-voltage tolerant inputs up to 12.5V and functions within an extended temperature range of -40°C to +125°C.

Feature Summary

• Nonvolatile memory with WiperLock technology for power-on recall
• Up/Down (U/D) serial control interface
• High-voltage tolerant digital inputs (up to 12.5V)
• Extended temperature operation (-40°C to +125°C)

Applications

• Audio volume control
• Gain adjustment in instrumentation amplifiers
• Voltage reference trimming

Procurement Notes

Verify the package marking against the MSOP-8 specification. Confirm the 'E' suffix indicates the extended temperature grade (-40°C to +125°C). Ensure the U/D interface timing requirements are met by the host controller.

Selection Notes

Select this component when nonvolatile storage is required for the wiper position. The 10kΩ value suits moderate impedance circuits. Verify that the 64-step resolution meets the application's precision needs compared to higher-resolution alternatives.

Part Context

This part belongs to the MCP402x family of low-cost digital potentiometers. The '103' code denotes the 10 kΩ resistance value. The 'MS' suffix specifies the 8-lead MSOP package. Other variants include different resistances and rheostat configurations.

Replacement Considerations

Direct replacements within the same family include MCP4021-103E/SN (SOIC-8) or MCP4021-103E/ML (DFN-8). Cross-family replacement requires verifying interface compatibility and pinout differences.