MCP4021T-202E/SN

Overview

The MCP4021T-202E/SN is a nonvolatile digital potentiometer manufactured by Microchip Technology in an 8-SOIC package. It features a nominal resistance of 2.1 kΩ with ±20% tolerance and 64 taps for precise adjustment. The device operates on a supply voltage range of 2.7V to 5.5V and utilizes a simple Up/Down (U/D) serial interface for control. Key specifications include a typical wiper resistance of 70 Ω, a maximum static current of 1 µA, and high-voltage tolerant inputs up to 12.5V. It incorporates WiperLock™ technology to store settings in EEPROM.

Feature Summary

• Nonvolatile memory with WiperLock™ technology for power-on recall of wiper settings
• Simple Up/Down (U/D) serial control interface with high-voltage tolerant inputs (up to 12.5V)
• Low power consumption with 1 µA maximum static current
• Extended temperature range operation from -40°C to +125°C

Applications

• Audio volume control and tone adjustment
• Gain setting in instrumentation amplifiers
• Voltage reference trimming
• LED brightness control

Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging and the 'SN' suffix denotes the 8-SOIC package. Confirm the '-202' code corresponds to the 2.1 kΩ resistance value. Ensure the 'E' suffix meets the extended industrial temperature requirements (-40°C to +125°C). Cross-reference the datasheet DS20001945F for specific pinout and electrical limits.

Selection Notes

Select this component when a single-channel digital potentiometer with nonvolatile storage is required. The 2.1 kΩ resistance value suits applications needing moderate impedance levels. The U/D interface simplifies control logic compared to I2C or SPI devices. Verify that the 12.5V input tolerance aligns with the system's control signal levels to avoid level shifting components.

Part Context

This part belongs to the MCP4021/2/3/4 family of low-cost nonvolatile digital potentiometers. The MCP4021 specifically offers a potentiometer configuration, whereas the MCP4022 is a rheostat variant. Other family members like MCP4023 and MCP4024 offer different pin counts and configurations in SOT-23 packages. All share the same core WiperLock™ technology and electrical characteristics.

Replacement Considerations

Direct replacements within the same family include MCP4021T-502E/SN (5 kΩ), MCP4021T-103E/SN (10 kΩ), and MCP4021T-503E/SN (50 kΩ). For alternative packages, consider MCP4021-202E/MS (8-MSOP). Ensure the replacement maintains the 64-tap resolution and nonvolatile memory requirement.