MCP4642T-502E/MF

Digital Potentiometers Overview

The MCP4642T-502E/MF is a dual-channel digital potentiometer featuring nonvolatile memory and an I²C serial interface. It provides two independent rheostat configurations with a nominal resistance (R_AB) of 5 kΩ, offering 129 discrete taps for 7-bit resolution. The device operates within a supply voltage range of 2.7V to 5.5V, with serial interface functionality supported down to 1.8V. Key specifications include a typical wiper resistance of 75 Ω, a bandwidth of 2 MHz at 5 kΩ, and high-voltage tolerant digital inputs up to 12.5V. It utilizes a DFN 3x3 package with an exposed thermal pad.

Digital Potentiometers Feature Summary

• Dual resistor network with 129 steps (7-bit resolution) and nonvolatile EEPROM storage.
• I²C serial interface supporting 100 kHz, 400 kHz, and 3.4 MHz High-Speed modes.
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V.
• WiperLock™ technology for securing calibration settings in EEPROM.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise analog adjustment.
• Voltage reference trimming and offset calibration circuits.
• Digital control of variable resistors in sensor signal conditioning.
• Audio volume or tone control systems utilizing rheostat configuration.

Digital Potentiometers Procurement Notes

Verify the suffix 'MF' corresponds to the DFN 3x3 package with an exposed thermal pad. Confirm the 'T' indicates tape-and-reel packaging. Ensure the '502' code matches the required 5 kΩ resistance value. Check for RoHS compliance status as specified in the manufacturer documentation.

Digital Potentiometers Selection Notes

Select this component when dual independent rheostats are required with persistent setting retention. The 5 kΩ resistance value suits applications needing moderate current handling without excessive power dissipation. The I²C interface minimizes pin count compared to SPI alternatives. Consider the 12.5V input tolerance if interfacing with higher voltage logic levels.

Digital Potentiometers Part Context

This part belongs to the MCP46XX family of dual digital potentiometers. It shares features with the MCP4641 (potentiometer config) and MCP4662 (8-bit resolution). The 'T' suffix denotes reel packaging, while 'MF' specifies the DFN footprint. It complements single-channel variants like the MCP4542.

Digital Potentiometers Replacement Considerations

MCP4642-502E/MF: Identical electrical specifications but tube packaging instead of tape-and-reel. MCP4642-502E/ML: Same function in QFN-16 package. MCP4662-502E/MF: Higher 8-bit resolution (257 steps) in the same DFN package.