MCP40D17T-502E/LTY

Overview

The MCP40D17T-502E/LTY is a single-channel digital potentiometer IC manufactured by Microchip Technology. It features a 5 kΩ resistance between terminals A and B with a tolerance of ±20%. The device provides 7-bit resolution, offering 128 discrete tap positions for precise adjustment. It utilizes an I²C serial interface for control and operates within a supply voltage range of 1.8 V to 5.5 V. The unit employs volatile RAM memory to store the wiper setting, which resets to mid-scale upon power-up or brown-out events. It is housed in a compact SC70-6 surface-mount package.

Feature Summary

• 7-bit resolution providing 128 distinct tap positions
• I²C serial interface supporting SMBus 2.0 protocols
• Volatile RAM memory with Power-on Reset (POR) to mid-scale
• Brown-out Reset protection at approximately 1.5 V

Applications

• Amplifier gain control and offset adjustment
• Sensor calibration for pressure, temperature, and position
• Set point or offset trimming in electronic circuits
• Replacement for mechanical trim potentiometers
• RF amplifier biasing networks

Procurement Notes

Verify the specific suffix 'LTY' against the official datasheet to confirm packaging details. Ensure the I²C address matches system requirements, as the MCP40D17 family uses a standard address. Confirm that the volatile memory type aligns with the application's need for power-on reset behavior.

Selection Notes

Select this component when a rheostat configuration is required with I²C control. The 5 kΩ value suits applications needing moderate current handling. Consider the 1.8 V minimum operating voltage if designing for low-power systems. Verify that the SC70-6 package dimensions fit the PCB layout constraints.

Part Context

This part belongs to the MCP40D17/18/19 family of 7-bit digital potentiometers. The MCP40D17 variant specifically supports rheostat configuration. It shares the same core architecture and interface as the MCP40D18 (potentiometer) and MCP40D19 (rheostat, SC70-5 package). The 'D' designation indicates support for command codes in the I²C protocol.

Replacement Considerations

The MCP4017T-502E/LTY is a parameter-equivalent alternative within the same family. Both devices share identical electrical characteristics, pinouts, and functionality. Verify that the replacement part number corresponds to the correct tape-and-reel packaging if applicable.