LMX331AUK+T

Overview

The LMX331AUK+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 automotive temperature range from -40°C to +125°C. The device features a 5-pin SOT23 package with dimensions of 2.9mm x 1.6mm x 1.0mm. Key electrical characteristics include a typical supply current of 60µA at 5.0V, an input common-mode voltage range that includes ground, and no phase reversal for overdriven inputs. Propagation delay is typically 100ns with 100mV input overdrive.

Feature Summary

• Drop-in pin-for-pin compatible replacement for LMV331/LMV393/LMV339 comparators
• Operates on a single supply voltage ranging from 1.8V to 5.5V
• Includes internal hysteresis in the H-series variants for noise immunity
• Designed using advanced submicron CMOS technology for superior performance

Applications

• Mobile communications devices
• Automotive applications
• Battery-powered electronics
• Notebooks and PDAs
• General-purpose portable devices

Procurement Notes

Verify the specific suffix 'AUK' corresponds to the SOT23-5 package and the '+T' indicates tape and reel packaging. Confirm RoHS compliance status via the '+' designation. Check for obsolescence notices as this component may be superseded by newer generations. Ensure the ordering information matches the required temperature grade and package type before finalizing procurement.

Selection Notes

Select the LMX331AUK+T when space constraints require a tiny-pack solution alongside low power consumption requirements. Choose this part if compatibility with existing LMV331 designs is necessary without layout changes. Consider the non-H variant if external hysteresis is preferred or if lower cost is prioritized over built-in noise immunity features provided by the H-series.

Part Context

This component belongs to the LMX331/LMX393/LMX339 family of general-purpose, low-voltage comparators. These devices are designed to replace older industry-standard bipolar comparators while offering improved performance metrics such as wider supply voltage ranges and better CMRR. The series utilizes CMOS technology to achieve low current consumption and small physical footprints suitable for modern portable electronics.

Replacement Considerations

The datasheet identifies the LMX331 as a drop-in replacement for the LMV331. Designers should verify that the original design accommodates the slight differences in propagation delay and offset voltage specifications between the legacy and new components.