MCP4017T-104E/LTY

Overview

The MCP4017T-104E/LTY is a single-channel digital potentiometer manufactured by Microchip Technology, featuring a 100 kΩ end-to-end resistance (RAB) and 128 discrete wiper steps. It utilizes an I²C serial interface for control and employs volatile RAM to store the wiper position. The device operates within a supply voltage range of 1.8V to 5.5V and supports Fast Mode communication up to 400 kHz. Designed for surface-mount applications, it is housed in a compact SC70-6 package and functions reliably across an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Seven-bit resolution providing 128 distinct wiper positions with linear taper.
• I²C serial interface supporting Standard Mode (100 kHz) and Fast Mode (400 kHz).
• Configurable as a rheostat or potentiometer with low wiper resistance (typical 100 Ω at 5.5V).
• Integrated power-on reset ensures the wiper defaults to mid-scale upon initialization.

Applications

• Programmable gain amplifiers and variable attenuators in signal conditioning circuits.
• Digital volume control and audio level adjustment systems.
• Sensor calibration and bias voltage trimming in embedded instrumentation.
• Voltage reference adjustment and analog filter frequency tuning.

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm that the 'Y' suffix corresponds to the specific tape-and-reel packaging configuration required for automated assembly processes. Ensure compatibility with existing PCB footprints for the SC70-6 package before finalizing procurement orders.

Selection Notes

Select this model when a 100 kΩ resistance value is required for rheostat or potentiometer configurations. Consider the volatile memory characteristic, which necessitates re-initialization after power loss. Verify that the system's I²C bus speed does not exceed 400 kHz and that the operating voltage remains within the 1.8V to 5.5V specification.

Part Context

This component belongs to the MCP4017/18/19 family of digital potentiometers. While the MCP4017 offers a rheostat configuration, the MCP4018 provides a potentiometer option, and the MCP4019 uses a five-pin package. All variants share identical electrical characteristics and control protocols but differ in terminal availability and pinout assignments.

Replacement Considerations

The MCP40D17T-104E/LTY serves as a direct functional replacement within the same product family. Both devices maintain identical electrical specifications, pinouts, and I²C communication protocols, ensuring drop-in compatibility for design updates.

FAQ

What is the default wiper position after power-up?

Upon power-up, the internal Power-On Reset circuit automatically sets the wiper to the mid-scale position (code 3Fh).

Does the device retain its setting when power is removed?

No, the MCP4017 uses volatile RAM. The wiper position is lost when VDD falls below the retention voltage and must be reprogrammed after power restoration.

What is the maximum I²C clock frequency supported?

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