MCP4018T-104E/LT

Overview

The MCP4018T-104E/LT is a single-channel, 7-bit digital potentiometer manufactured by Microchip Technology. It features volatile RAM memory and an I2C serial interface for wiper control. The device offers 128 resistance steps with a nominal end-to-end resistance of 100 kΩ (indicated by the '104' suffix). It operates within a supply voltage range of 1.8V to 5.5V and supports standard and fast-mode I2C protocols up to 400 kHz. Packaged in a compact SC-70-6 surface-mount format, it includes power-on reset protection that defaults the wiper to mid-scale.

Feature Summary

• 7-bit resolution providing 128 discrete tap positions
• I2C serial interface supporting Standard (100 kHz) and Fast Mode (400 kHz)
• Volatile RAM storage for wiper position data
• Power-on Reset (POR) feature sets wiper to mid-scale upon startup

Applications

• Audio volume control circuits
• Variable gain amplifier adjustment
• Voltage reference trimming
• Sensor biasing configuration

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Confirm availability status as distribution channels may vary. Ensure the I2C bus voltage levels are compatible with the system logic before integration.

Selection Notes

Select this component when a single-channel digital potentiometer with I2C control is required. The 100 kΩ resistance value suits applications needing higher impedance networks. Consider the volatile memory characteristic if power loss retention is not needed, or choose a non-volatile variant if state preservation across power cycles is critical.

Part Context

This part belongs to the MCP4017/18/19 family of 7-bit digital potentiometers. The MCP4018 specifically denotes the Potentiometer configuration variant housed in an SC-70-6 package, distinguishing it from the Rheostat configurations found in the MCP4017 and MCP4019 models.

Replacement Considerations

Direct functional replacements within the same family include the MCP4017T-104E/LT and MCP4019T-104E/LT, provided the circuit accommodates the respective Rheostat pinout differences.