MCP4021-202E/MSVAO

Overview

The MCP4021-202E/MSVAO is a nonvolatile digital potentiometer featuring WiperLock technology for secure EEPROM storage. It offers 64 taps with a nominal resistance of 2.1 kΩ and ±20% tolerance. The device operates on a 2.7V to 5.5V supply, drawing 45 µA at 5.5V. It utilizes a simple Up/Down serial interface and supports high-voltage tolerant inputs up to 12.5V. Packaged in MSOP-8, it functions across an extended temperature range of –40°C to +125°C.

Feature Summary

• WiperLock™ Technology secures wiper settings in nonvolatile EEPROM without external write-protect pins.
• High-Voltage Tolerant Digital Inputs allow CS and U/D signals up to 12.5V while VDD remains low.
• Low Power Operation provides static current as low as 1 µA when the serial interface is inactive.
• Linear Taper with 64 taps enables precise resistance adjustment between Terminal A and Terminal B.

Applications

• Calibration circuits requiring persistent setting retention after power loss.
• Audio volume control systems utilizing high-voltage tolerant interfaces.
• Sensor biasing adjustments in industrial environments with wide temperature swings.
• Gain control stages in instrumentation amplifiers needing nonvolatile configuration.

Procurement Notes

Verify the 'VAO' suffix indicates automotive qualification or specific vendor ordering requirements distinct from standard commercial variants. Confirm package integrity for MSOP-8 components subject to moisture sensitivity levels. Ensure design compatibility with the 2.1kΩ resistance value and 64-tap resolution before procurement.

Selection Notes

Select this component for applications requiring nonvolatile memory integration directly within the potentiometer structure. The 2.1kΩ value suits moderate impedance networks. Consider the 12.5V input tolerance if interfacing with higher voltage logic domains without level shifting. The MSOP-8 package is suitable for space-constrained PCB layouts requiring surface mount assembly.

Part Context

This part belongs to the MCP4021/2/3/4 family of low-cost nonvolatile digital potentiometers. The '202' designation specifies the 2.1 kΩ resistance value. The 'E' denotes the extended industrial temperature range (-40°C to +125°C). The '/MS' indicates the MSOP-8 package type. The 'VAO' suffix typically signifies automotive-grade reliability or specific OEM distribution channels.

Replacement Considerations

Direct pin-compatible replacements within the same family include MCP4021-202E/MS (commercial grade) or MCP4021-202T-E/MS (tape and reel). For rheostat configurations, consider the MCP4022 series. Verify that alternative packages like SOIC or DFN meet thermal and spatial constraints if physical footprint changes are acceptable.