MCP4021-503E/SN

Overview

The MCP4021-503E/SN is a nonvolatile, 6-bit digital potentiometer manufactured by Microchip Technology in an 8-pin SOIC package. It features a nominal resistance of 50 kΩ with 64 taps and utilizes a simple Up/Down (U/D) serial interface for wiper control. The device incorporates WiperLock™ technology to secure settings in EEPROM without a write-protect pin. Operating voltages range from 2.7V to 5.5V, with extended temperature support from -40°C to +125°C. Key electrical parameters include a typical wiper resistance of 75 Ω, low power consumption of 1 µA max static current, and high-voltage tolerant digital inputs up to 12.5V.

Feature Summary

• Nonvolatile memory with WiperLock™ technology for secure setting retention
• Simple 2-wire Up/Down (U/D) serial control interface
• High-voltage tolerant digital inputs supporting up to 12.5V
• Extended temperature range operation from -40°C to +125°C

Applications

• System calibration and gain adjustment
• Audio volume control
• Voltage reference trimming
• Sensor biasing and offset adjustment

Procurement Notes

Verify the 'SN' suffix indicates the 8-lead Small Outline Integrated Circuit (SOIC) package. Confirm the 'E' suffix denotes the extended industrial temperature range (-40°C to +125°C). Ensure the '-503' code corresponds to the 50 kΩ resistance value. Check RoHS compliance status as specified in the manufacturer's documentation.

Selection Notes

Select this component when a nonvolatile digital potentiometer with high-voltage tolerant inputs is required. The 50 kΩ resistance value suits moderate impedance applications. The U/D interface simplifies control logic compared to SPI or I2C alternatives. Consider the 75 Ω wiper resistance and bandwidth limitations for signal path applications.

Part Context

This part belongs to the MCP4021/2/3/4 family of low-cost nonvolatile digital potentiometers. The MCP4021 variant specifically supports potentiometer configuration, while others like MCP4022 support rheostat mode. All share the same core architecture, WiperLock™ technology, and U/D interface capabilities.

Replacement Considerations

Direct replacements within the same family include MCP4021-503E/MS (MSOP package) or MCP4021-503E/ST (DFN package). Verify pinout compatibility and thermal characteristics when substituting packages.