LMX339HAUD+

Overview

The LMX339HAUD+ is a quad general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single supply voltage ranging from 1.8V to 5.5V and supports an extended automotive temperature range of -40°C to +125°C. The device features internal hysteresis of 2mV for noise immunity, low supply current (60µA per comparator at 5.0V), and open-drain outputs. Input common-mode voltage includes ground, and the device exhibits no phase reversal for overdriven inputs.

Feature Summary

• Internal 2mV hysteresis provides noise immunity and prevents output oscillations with slow-moving signals
• Low supply current consumption optimized for battery-powered applications
• Input common-mode voltage range extends to ground without phase reversal
• Drop-in pin-for-pin compatible replacement for LMV339

Applications

• Mobile communications devices
• Automotive electronic systems
• Battery-powered electronics
• General-purpose portable devices

Procurement Notes

Verify that the ordering suffix 'AUD+' corresponds to the 14-pin TSSOP package and lead-free/RoHS compliance as defined in the manufacturer's ordering information table. Confirm the 'H' designation indicates the presence of internal hysteresis. Ensure the component meets the specified -40°C to +125°C operating temperature range requirements for your application environment.

Selection Notes

Select this component when a quad comparator with integrated hysteresis is required for noise-sensitive environments. It serves as a direct drop-in replacement for the LMV339 series. Consider the 14-pin TSSOP package constraints and the open-drain output configuration requiring external pull-up resistors. Verify that the 1.8V to 5.5V supply range aligns with the system power architecture.

Part Context

The LMX339HAUD+ belongs to the LMX331/LMX393/LMX339 family of general-purpose, low-voltage comparators. These devices are manufactured using advanced submicron CMOS technology. The 'H' variant specifically adds internal hysteresis compared to the standard LMX339 model. The family offers advantages such as wider supply voltage range and improved RF immunity over traditional BiCMOS or bipolar versions.

Replacement Considerations

The datasheet identifies the LMX339H series as drop-in, pin-for-pin-compatible replacements for the LMV339. Designers can substitute the LMV339 with the LMX339HAUD+ without modifying the PCB layout, provided the supply voltage and temperature range specifications are met.