MAX5435MEZT+T

Overview

The MAX5435MEZT+T is a nonvolatile, linear-taper digital potentiometer featuring 32 tap points and an end-to-end resistance of 100kΩ. It utilizes a fast-mode I²C-compatible serial interface for communication at data rates up to 400kbps. The device incorporates internal EEPROM to recall the wiper position upon power-up. Operating on a single supply voltage ranging from +2.7V to +5.25V, it consumes typically 0.5µA in standby mode. The component is housed in a 6-pin thin SOT23 package and is specified for operation over an extended temperature range of -40°C to +85°C.

Feature Summary

• Nonvolatile memory retains wiper position after power loss
• I²C-compatible serial interface with 400kbps data rate
• 100kΩ end-to-end resistance with 32 tap positions
• Low standby current consumption of 0.5µA typical

Applications

• Mechanical potentiometer replacement
• Low-drift programmable-gain amplifier circuits
• Liquid-crystal display (LCD) screen adjustment

Procurement Notes

Verify the specific I²C slave address assigned to the MAX5435MEZT+T variant before integration, as factory-programmed addresses vary within the family. Confirm that the 6-pin thin SOT23 package dimensions align with the target PCB footprint. Ensure the design accommodates the required pullup resistors for the SDA and SCL lines to maintain signal integrity during high-speed communication.

Selection Notes

Select this component when a 100kΩ variable resistor configuration is required rather than a voltage-divider setup. The MAX5435 internally connects the high terminal to the wiper, distinguishing it from the MAX5433 which exposes all three terminals. Verify that the system's I²C bus supports the necessary addressing scheme, as the A0 pin is not available for address selection on this package type.

Part Context

This part belongs to the MAX5432–MAX5435 series of 32-tap, nonvolatile, I²C, linear digital potentiometers. While the MAX5432 and MAX5433 are available in 8-pin TDFN packages with exposed pads, the MAX5434 and MAX5435 utilize a compact 6-pin thin SOT23 package. The series shares common electrical characteristics, including low temperature coefficients and nonvolatile storage capabilities.

Replacement Considerations

The MAX5433LEZT+T or MAX5433NEZT+T may serve as functional substitutes if the application requires access to the high terminal for voltage-divider configurations. These alternatives provide the same 100kΩ resistance and 32-tap resolution but differ in pinout by exposing the H terminal instead of connecting it internally to the wiper.