MCP4021T-502E/SN

Overview

The MCP4021T-502E/SN is a nonvolatile, 6-bit digital potentiometer manufactured by Microchip Technology in an 8-pin SOIC package. It features a nominal resistance of 5 kΩ with ±20% tolerance and 64 taps for precise adjustment. The device utilizes WiperLock™ technology to store the wiper setting in EEPROM, ensuring power-on recall without external write-protect pins. It operates on a supply voltage range of 2.7V to 5.5V and supports an Up/Down (U/D) serial interface with high-voltage tolerant inputs up to 12.5V. Typical static current is 1 µA max, with extended temperature operation from –40°C to +125°C.

Feature Summary

• Nonvolatile memory with WiperLock™ technology for secure wiper setting retention
• Simple Up/Down (U/D) serial control interface with high-voltage tolerant inputs (up to 12.5V)
• 6-bit resolution providing 64 taps with 5 kΩ nominal resistance
• Low power consumption with 1 µA maximum static current

Applications

• Audio volume control and tone adjustment circuits
• Variable gain amplifier biasing and calibration
• Power supply voltage reference trimming
• Sensor signal conditioning offset adjustment

Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging and 'SN' denotes the 8-SOIC package. Confirm the 'E' suffix corresponds to the extended temperature range (-40°C to +125°C). Ensure the datasheet DS20001945F matches the specific revision required for your design constraints.

Selection Notes

Select this component when nonvolatile resistance settings are required without additional microcontroller intervention. The U/D interface simplifies control logic compared to SPI or I2C alternatives. Verify that the 5 kΩ resistance value fits the circuit's impedance requirements and that the 64-step resolution meets the necessary precision.

Part Context

This part belongs to the MCP4021/2/3/4 family of low-cost nonvolatile digital potentiometers. The MCP4021 variant specifically offers potentiometer configuration options, while other family members may offer rheostat modes or different pinouts. The T-502E/SN designation specifies the 5 kΩ version in the SOIC package.

Replacement Considerations

Direct replacements within the same family include MCP4021T-202E/SN (2.1 kΩ), MCP4021T-103E/SN (10 kΩ), and MCP4021T-503E/SN (50 kΩ). Other packages like MSOP or DFN are available with corresponding suffixes (e.g., /MS, /MC) if form factor changes are acceptable.