MCP4019T-502E/LT

Overview

The MCP4019T-502E/LT is a single-channel digital potentiometer manufactured by Microchip Technology. It features a 7-bit resolution providing 128 discrete wiper positions and utilizes volatile RAM for memory storage. The nominal resistance between terminals A and B is 5 kΩ with a ±20% tolerance. The device operates on a supply voltage range of 1.8V to 5.5V and communicates via an I²C serial interface. It is housed in a compact SC70-5 surface-mount package.

Feature Summary

• 7-bit resolution with 128 tap positions
• I²C serial interface supporting standard and fast modes
• Volatile RAM memory retaining settings only during power
• SC70-5 package with low profile

Applications

• Audio volume control circuits
• Programmable gain amplifier biasing
• Voltage reference adjustment
• Sensor calibration trimming

Procurement Notes

Verify the specific suffix 'LT' corresponds to the SC70-5 package and tape-and-reel shipping configuration. Confirm that the 'E' designation indicates compliance with RoHS standards. Ensure the source documentation matches datasheet DS22147A for accurate electrical specifications.

Selection Notes

Select this component when a rheostat configuration is required rather than a potentiometer setup. The volatile memory necessitates re-initialization after power cycles. Verify that the 5 kΩ resistance value aligns with the target circuit impedance requirements.

Part Context

This part belongs to the MCP4017/18/19 family of digital potentiometers. The MCP4019 variant specifically provides a rheostat configuration in a 5-pin SC70 package, distinguishing it from the MCP4018 which offers a potentiometer configuration in a 6-pin package.

Replacement Considerations

The MCP4017T-502E/LT serves as a functional substitute if a 6-pin SC70-6 package is acceptable. Other family members like the MCP4018T-502E/LTY offer different terminal configurations.