MCP4018T-503E/LTY

Overview

The MCP4018T-503E/LTY is a single-channel, 7-bit volatile digital potentiometer manufactured by Microchip Technology. It features an I2C serial interface and operates within a supply voltage range of 1.8V to 5.5V. The device provides 128 wiper positions with a nominal end-to-end resistance (RAB) of 50 kΩ. Key electrical characteristics include a typical wiper resistance of 100 Ω, a bandwidth of 260 kHz at the specified resistance, and low power consumption with a static current of 2.5 µA. It supports both potentiometer and rheostat configurations and includes brown-out reset protection.

Feature Summary

• 7-bit resolution providing 128 discrete wiper steps for precise resistance control
• I2C serial interface supporting standard and fast mode operations up to 400 kHz
• Wide operating voltage range from 1.8V to 5.5V with low static current consumption
• Brown-out Reset (BOR) protection ensures reliable operation during power transitions

Applications

• Programmable gain amplifiers in signal conditioning circuits
• Voltage reference adjustment and bias setting
• Audio volume control and tone adjustment systems
• Sensor calibration and offset trimming

Procurement Notes

Verify the specific ordering suffix 'LTY' corresponds to the SC70-6 package and tape-and-reel shipping configuration as defined in the official datasheet. Confirm that the '503' code accurately specifies the 50 kΩ resistance value for the intended circuit design requirements.

Selection Notes

Select this component when a single-channel digital potentiometer with I2C control is required. Ensure the application utilizes volatile memory, as values are lost upon power loss. Verify that the 50 kΩ resistance and 128-step resolution meet the system's precision and impedance matching needs.

Part Context

This part belongs to the MCP4017/18/19 family of 7-bit digital potentiometers. The MCP4018 variant specifically offers a potentiometer configuration with six pins in an SC70 package, distinguishing it from the rheostat-only MCP4017 and the five-pin MCP4019.

Replacement Considerations

Direct functional substitutes within the same family include the MCP4017T-503E/LTY (rheostat configuration) and MCP4019T-503E/LT (five-pin rheostat). Cross-family replacements like the MCP4552 offer similar I2C interfaces but may differ in pinout or package dimensions.