MCP4021T-202E/MSVAO

Overview

The MCP4021T-202E/MSVAO is a nonvolatile, 6-bit digital potentiometer manufactured by Microchip Technology. It features a nominal resistance of 2.1 kΩ with 64 taps and operates within a supply voltage range of 2.7V to 5.5V. The device utilizes WiperLock™ technology to store wiper settings in EEPROM, ensuring power-on recall without external write-protect pins. It employs a simple Up/Down (U/D) serial interface for control and supports high-voltage tolerant inputs up to 12.5V. Designed for extended industrial applications, it functions reliably across temperatures from -40°C to +125°C.

Feature Summary

• WiperLock™ Nonvolatile Memory: Stores wiper settings in EEPROM for automatic recall upon power-up.
• High-Voltage Tolerant Inputs: CS and U/D pins tolerate voltages up to 12.5V relative to VSS.
• Simple Serial Interface: Controlled via a basic two-wire Up/Down protocol.
• Extended Temperature Range: Qualified for operation between -40°C and +125°C.

Applications

• Industrial process control systems requiring adjustable gain or reference voltages.
• Automotive electronics utilizing high-voltage tolerant interfaces.
• Portable battery-powered devices benefiting from low static current consumption.
• Audio equipment for digital volume control applications.

Procurement Notes

Verify the 'VAO' suffix indicates automotive qualification status against official Microchip documentation. Confirm package integrity for MSOP-8 SMD mounting. Ensure ESD precautions are taken during handling due to sensitivity ratings. Cross-reference datasheet DS20001945F for specific electrical tolerances.

Selection Notes

Select this component when a single-channel digital potentiometer with nonvolatile memory is required. The 2.1 kΩ value suits impedance matching or low-power signal conditioning. Use the U/D interface if GPIO resources are limited. Consider thermal resistance of 206 °C/W for MSOP-8 packaging in high-temperature environments.

Part Context

This part belongs to the MCP4021/2/3/4 family of low-cost nonvolatile digital potentiometers. The 'MCP4021' designation specifies a potentiometer configuration, while '202' indicates the 2.1 kΩ resistance value. The '/MS' denotes the 8-lead MSOP package. The 'T' typically signifies tape and reel packaging.

Replacement Considerations

Direct substitutes include other MCP4021 variants with different resistance values or packages, such as MCP4021-502E/MS (5 kΩ). For rheostat configurations, consider the MCP4022 series. Verify pin compatibility and interface protocols before substituting.