MCP4017T-502E/LT

Overview

The MCP4017T-502E/LT is a single-channel digital potentiometer manufactured by Microchip Technology, housed in a compact SC-70-6 surface-mount package. It features a 7-bit resolution providing 128 discrete wiper taps and operates with a nominal resistance of 5 kΩ (±20% tolerance). The device utilizes an I²C serial interface for control and includes volatile RAM to store the wiper position. Key electrical specifications include a supply voltage range of 1.8V to 5.5V, a typical static current of 2.5 µA, and a low wiper resistance of 100 Ω. It supports rheostat configuration with zero-scale to full-scale operation and offers extended temperature performance from -40°C to +125°C.

Feature Summary

• 7-bit resolution with 128 steps and 5 kΩ nominal resistance
• I²C serial interface supporting standard (100 kHz) and fast (400 kHz) modes
• Low power consumption with 2.5 µA typical static current
• Brown-out reset protection and mid-scale power-on default setting

Applications

• Programmable gain amplifiers
• Voltage reference adjustment
• Digital volume control in audio circuits
• Sensor biasing and calibration

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix 'LT' corresponds to the SC-70-6 tape and reel packaging format. Check for RoHS compliance status and ensure the order quantity aligns with standard manufacturing pack sizes.

Selection Notes

Select this model when a rheostat configuration is required rather than a potentiometer setup. Ensure the system design accommodates volatile memory behavior, as the wiper setting resets upon power loss. Verify that the I²C bus speed requirements match the device's support for up to 400 kHz operation.

Part Context

This component belongs to the MCP4017/18/19 family of digital potentiometers. While the MCP4018 offers a potentiometer configuration and the MCP4019 uses a smaller SC-70-5 package, the MCP4017 specifically provides a rheostat configuration within the SC-70-6 footprint. All variants share identical electrical characteristics and interface protocols.

Replacement Considerations

MCP4017T-502E/LTY

FAQ

What happens to the wiper setting during a power cycle?

The device utilizes volatile RAM, meaning the wiper setting is lost when power is removed. Upon power-up, the wiper defaults to the mid-scale position (3Fh hex).

Does the MCP4017 support potentiometer mode?

No, the MCP4017 is configured specifically as a rheostat. For potentiometer applications, the MCP4018 variant should be used.

What is the maximum I²C clock frequency supported?

The device supports Fast Mode I²C operation with a maximum clock frequency of 400 kHz, provided the supply voltage is between 2.7V and 5.5V.