LMX339HASD+T

Overview

The LMX339HASD+T is a quad general-purpose low-voltage comparator manufactured by Analog Devices Inc./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 internal hysteresis for noise immunity, open-drain outputs, and input common-mode voltage ranges that include ground. It utilizes advanced submicron CMOS technology to achieve superior performance characteristics compared to traditional BiCMOS or bipolar versions.

Feature Summary

• Internal 2mV hysteresis provides noise immunity and prevents output oscillations with slow-moving signals
• Open-drain output configuration allows flexible interfacing with various logic levels
• Input common-mode voltage range includes ground potential
• No phase reversal occurs for overdriven inputs

Applications

• Mobile communications systems
• Automotive applications requiring wide temperature operation
• Battery-powered electronics
• General-purpose portable devices

Procurement Notes

Verify the specific ordering suffix '+T' indicates tape and reel packaging when sourcing this component. Confirm the manufacturer designation as Analog Devices Inc./Maxim Integrated to ensure authenticity. Check for lead-free/RoHS compliance status associated with the '+' suffix in the part number. Ensure the package type matches the required 14-pin SOIC footprint for your design.

Selection Notes

Select this component when a quad comparator with integrated hysteresis is required for noisy environments. It serves as a drop-in replacement for LMV339 equivalents while offering improved RF immunity and lower offset voltage. Consider the open-drain output requirement for pull-up resistor implementation. Evaluate the 1.8V to 5.5V supply range against system power constraints.

Part Context

This part belongs to the LMX331/LMX393/LMX339 series of general-purpose, low-voltage comparators. The 'H' variant specifically denotes the inclusion of internal hysteresis. The 'SD' suffix identifies the 14-pin Small Outline (SO) package. The 'T' suffix specifies tape and reel packaging for automated assembly processes.

Replacement Considerations

LMX339ASD+T is a compatible alternative without internal hysteresis. LMV339 equivalents are pin-for-pin compatible but lack the enhanced performance features of the LMX series.