LMX331HAXK-T

Overview

The LMX331HAXK-T is a single-channel, low-voltage comparator manufactured by Analog Devices/Maxim Integrated. It operates within a supply voltage range of 1.8V to 5.5V and supports an extended automotive temperature range from -40°C to +125°C. The device features internal hysteresis of 2mV for noise immunity and utilizes an open-drain output configuration. It is housed in a compact 5-pin SC70 package (2.0mm x 2.1mm x 1.0mm). Typical supply current is 60µA per comparator at VDD = 5.0V.

Feature Summary

• Internal 2mV hysteresis provides noise immunity and prevents output oscillations with slow-moving input signals.
• Open-drain output stage ensures compatibility with various logic levels without phase reversal for overdriven inputs.
• Input common-mode voltage range includes ground, allowing operation down to the negative rail.
• Designed using advanced submicron CMOS technology for superior performance compared to BiCMOS or bipolar versions.

Applications

• Mobile communications devices
• Automotive applications requiring extended temperature stability
• Battery-powered electronics and portable devices

Procurement Notes

Verify the specific ordering suffix 'T' indicates tape-and-reel packaging when sourcing components. Confirm that the 'H' designation in the part number corresponds to the version with integrated hysteresis. Ensure the manufacturer source is recognized as Analog Devices or Maxim Integrated to guarantee authenticity and compliance with RoHS standards indicated by the '+' suffix.

Selection Notes

Select this component for designs requiring a drop-in replacement for LMV331/LMV393/LMV339 series comparators where space is constrained. The SC70 package offers significant size reduction compared to traditional SOT-23 options. Consider the internal hysteresis feature if external feedback resistors are undesirable for reducing bill-of-materials complexity in noisy environments.

Part Context

The LMX331HAXK-T belongs to the LMX331/LMX393/LMX339 family of general-purpose, low-voltage comparators. This series is engineered to provide cost-effective solutions for portable and automotive systems. The 'H' variant specifically differentiates itself from the standard LMX331 by including built-in hysteresis, enhancing reliability in signal processing applications without additional external circuitry.

Replacement Considerations

The datasheet identifies the LMX331 series as pin-for-pin-compatible replacements for the LMV331/LMV393/LMV339. When substituting, verify that the original design accommodates the specific electrical characteristics of the LMX series, particularly regarding propagation delay and offset voltage differences.