MCP4642T-503E/MF

Digital Potentiometers Overview

The MCP4642T-503E/MF is a dual-channel digital potentiometer IC manufactured by Microchip Technology. It features two independent rheostat configurations with a nominal resistance of 50 kΩ and a tolerance of ±20%. The device provides 7-bit resolution, offering 128 taps (129 steps) per channel. It utilizes an I²C serial interface for communication and includes nonvolatile memory to retain wiper settings. The component operates within a supply voltage range of 2.7V to 5.5V and is housed in a DFN 3x3 package.

Digital Potentiometers Feature Summary

• Dual resistor network with 50 kΩ nominal resistance and ±20% tolerance
• 7-bit resolution providing 128 taps per potentiometer
• Nonvolatile EEPROM memory with WiperLock™ technology
• I²C serial interface supporting 100 kHz, 400 kHz, and 3.4 MHz speeds

Digital Potentiometers Applications

• Calibration of sensor offset and gain
• Adjustable voltage reference circuits
• Programmable gain amplifier biasing
• Audio volume control applications

Digital Potentiometers Procurement Notes

Verify the specific suffix 'MF' corresponds to the DFN 3x3 package with exposed thermal pad as indicated in the datasheet diagrams. Confirm that the 'T' suffix denotes tape and reel packaging if required for automated assembly processes. Ensure the operating environment stays within the specified -40°C to +125°C temperature range.

Digital Potentiometers Selection Notes

Select this model when dual independent rheostats are required rather than potentiometers. The 50 kΩ value suits moderate impedance applications. Verify that the I²C address configuration via HVC/A0, A1, and A2 pins fits the system bus topology. Consider the 75 Ω typical wiper resistance impact on signal integrity for high-frequency signals.

Digital Potentiometers Part Context

This part belongs to the MCP454X/456X/464X/466X family of digital potentiometers. It shares core architecture with volatile counterparts like the MCP4632 but adds nonvolatile storage. The '42' designation indicates a dual rheostat configuration with 7-bit resolution. The '503' code specifies the 50 kΩ resistance value.

Digital Potentiometers Replacement Considerations

MCP4642-503E/UN: Same electrical specifications but in MSOP-10 package. MCP4642T-503E/UN: Same electrical specifications in MSOP-10 tape and reel. MCP4652-503E/MF: Dual rheostat with 8-bit resolution (257 steps) in identical DFN package.