MAX5489EUD+T

Overview

The MAX5489EUD+T is a dual, linear-taper digital potentiometer featuring a 3-wire SPI-compatible interface and nonvolatile EEPROM memory. It provides two independent resistor networks with an end-to-end resistance of 100kΩ and 256 tap positions. The device operates on a single +2.7V to +5.25V supply, drawing 400µA during write cycles and 1µA in standby. Key electrical characteristics include ±1 LSB INL, ±0.5 LSB DNL, and a 35ppm/°C temperature coefficient. It is housed in a 14-pin TSSOP package and guaranteed for operation from -40°C to +85°C.

Feature Summary

• Dual 100kΩ resistive arrays with 256 programmable tap positions
• Nonvolatile EEPROM retains wiper settings across power cycles (50-year retention)
• SPI-compatible serial interface requiring only three control lines
• Low standby current of 1µA and extended industrial temperature range

Applications

• LCD screen contrast and bias adjustment
• Audio volume control circuits
• Programmable gain amplifiers
• Low-drift programmable filters

Procurement Notes

Verify the 'U' suffix indicates the 14-pin TSSOP package configuration. Confirm the '+' suffix denotes lead-free/RoHS compliance status. Ensure the component meets the required -40°C to +85°C operating temperature range for the specific application environment.

Selection Notes

Select this model over the MAX5487 or MAX5488 when a higher end-to-end resistance of 100kΩ is required. Verify that the 14-pin TSSOP footprint fits the PCB layout constraints compared to the 16-pin TQFN option. Check that the maximum continuous current limits for the 100kΩ variant are sufficient for the load requirements.

Part Context

This component belongs to the MAX5487/MAX5488/MAX5489 family of dual digital potentiometers. While functionally identical regarding interface and memory, the MAX5489 is distinguished by its 100kΩ end-to-end resistance value, whereas the MAX5487 offers 10kΩ and the MAX5488 offers 50kΩ.

Replacement Considerations

Direct functional substitutes within the same series include the MAX5487ETE+T and MAX5488ETE+T, provided the resistance values align with circuit requirements. Other packages such as the 16-pin TQFN variants can replace the TSSOP version if pinout compatibility is addressed.