MAX5474EKA+T

Overview

The MAX5474EKA+T is a single-channel, nonvolatile linear-taper digital potentiometer featuring 32 wiper positions and a 50kΩ end-to-end resistance. It operates on a single supply voltage ranging from +2.7V to +5.25V with a maximum static supply current of 1µA. The device utilizes a 3-wire up/down digital interface (CS, U/D, INC) for control and includes EEPROM to retain the wiper position upon power-up. Packaged in an 8-pin SOT-23, it supports both variable-resistor and voltage-divider configurations over an extended temperature range of -40°C to +85°C.

Feature Summary

• Nonvolatile memory retains wiper position across power cycles
• 3-wire serial interface (CS, U/D, INC)
• Single-supply operation from 2.7V to 5.25V
• Low static supply current of 1µA maximum

Applications

• Mechanical potentiometer replacement
• LCD screen adjustment
• Audio volume control
• Programmable filters

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific lot traceability requirements relevant to your manufacturing standards. Ensure storage conditions align with moisture sensitivity level specifications to prevent package damage prior to assembly.

Selection Notes

Select this model when a 50kΩ resistance value and 3-terminal configuration are required. Choose the MAX5475 variant if a 100kΩ resistance is needed instead. Verify that the system interface supports the 3-wire protocol and that the operating voltage remains within the 2.7V to 5.25V range. Consider the SOT-23-8 footprint constraints during PCB layout.

Part Context

This component belongs to the MAX547x family of 32-tap nonvolatile digital potentiometers manufactured by Analog Devices / Maxim Integrated. The family includes variants like the MAX5471, MAX5472, and MAX5475, which differ primarily in resistance values (50kΩ vs 100kΩ) and terminal configurations (variable resistor vs. voltage divider).

Replacement Considerations

The MAX5475EKA+T serves as a functional substitute if a 100kΩ resistance value is acceptable. Other members of the MAX547x series share similar pinouts and interfaces but may require verification of resistance tolerance and specific electrical characteristics against the original design requirements.