MCP4351T-104E/ML

Digital Potentiometers Overview

The MCP4351T-104E/ML is a quad-channel digital potentiometer IC from Microchip Technology, featuring volatile memory and an SPI serial interface. It provides four independent resistor networks with 8-bit resolution, offering 256 steps (257 taps) per channel. The device supports R_AB resistance options including 100 kΩ for the -104 suffix. It operates within a wide voltage range of 1.8V to 5.5V and includes high-voltage tolerant digital inputs up to 12.5V. The component is housed in a 20-lead QFN package.

Digital Potentiometers Feature Summary

• Quad Resistor Network: Four independent potentiometers or rheostats.
• 8-Bit Resolution: Provides 256 discrete steps (257 taps) per channel.
• SPI Interface: Supports 10 MHz operation in Modes 0,0 and 1,1.
• High-Voltage Inputs: Digital inputs tolerate voltages up to 12.5V.

Digital Potentiometers Applications

• Programmable gain amplifiers
• Voltage reference adjustment
• Audio volume control

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix 'T' indicates tape and reel packaging and 'ML' denotes the 20-QFN package. Confirm the '-104' suffix corresponds to the 100 kΩ resistance value. Ensure the design accounts for the volatile nature of the wiper settings, as power loss resets the device to mid-scale.

Digital Potentiometers Selection Notes

Select this model over non-volatile variants (MCP436X) if power consumption during standby is critical, as it lacks EEPROM. Verify that the 100 kΩ resistance value meets the circuit's impedance requirements. Ensure the SPI controller supports the required clock speeds and modes. Check thermal dissipation capabilities for the QFN package under maximum load conditions.

Digital Potentiometers Part Context

This part belongs to the MCP433X/435X family of quad digital potentiometers. The MCP4351 specifically distinguishes itself by offering 8-bit resolution compared to the 7-bit MCP4331. It shares the same pinout and interface characteristics as other members of the series but differs in memory type and resolution.

Digital Potentiometers Replacement Considerations

Direct substitutes include other MCP4351 variants with different resistance values (e.g., MCP4351-503E/ML for 50 kΩ). Cross-family replacements like MCP4341 offer non-volatile memory but require verification of voltage ranges and pin compatibility.