MCP40D19T-104E/LT

Overview

The MCP40D19T-104E/LT is a single-channel digital potentiometer IC manufactured by Microchip Technology. It features a 7-bit resistor network providing 128 tap positions and operates via an I2C serial interface. The device supports a resistance range of 5 kΩ to 100 kΩ, with the '104' suffix indicating a nominal 100 kΩ value. It utilizes volatile RAM for wiper memory and includes power-on reset protection that defaults the wiper to mid-scale. The component operates within a supply voltage range of 1.8V to 5.5V and is housed in a compact SC-70-5 surface-mount package.

Feature Summary

• 7-bit resolution with 128 discrete tap positions
• I2C protocol support including SMBus 2.0 Write Byte/Word formats
• Brown-out Reset (BOR) protection with Power-On Reset (POR) defaulting to mid-scale
• Low static current consumption of 2.5 µA typical

Applications

• Amplifier gain control and offset adjustment
• Sensor calibration for pressure, temperature, position, optical, and chemical sensors
• Set point or offset trimming
• RF amplifier biasing
• LCD brightness and contrast adjustment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm pinout compatibility and package dimensions. Ensure the selected variant matches the required resistance tolerance and temperature coefficient specifications for the target application environment.

Selection Notes

Select this model when a rheostat configuration is required in a minimal footprint. Compare against the MCP40D17 if a 6-pin SC-70 package is preferred, or the MCP40D18 if a potentiometer configuration is needed instead of a rheostat setup.

Part Context

This component belongs to the MCP40D17/18/19 family of 7-bit digital potentiometers. The MCP40D19 specifically designates the rheostat configuration variant packaged in a 5-lead SC-70 format, distinguishing it from the 6-lead variants offered by other members of the series.

Replacement Considerations

MCP4019T-104E/LT