LM239AQDRG4Q1

Overview

The LM239AQDRG4Q1 is an automotive-grade quad differential comparator manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 30 V and draws a typical operating current of 2 mA. The device features a response time of 300 ns, with each channel capable of sourcing up to 16 mA output current. Input specifications include a maximum input offset voltage of 3 mV and an input bias current of 250 nA. It is housed in a 14-pin SOIC package and supports CMOS and TTL outputs. The component is qualified under AEC-Q100 standards for operation between -40°C and +125°C.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability
• Quad differential architecture providing four independent comparison channels
• Wide single-supply voltage capability ranging from 2 V to 30 V
• Open-collector outputs compatible with CMOS and TTL logic families

Applications

• Automotive electronic control units requiring signal monitoring
• Voltage level detection circuits in vehicle power systems
• Over-voltage and under-voltage protection mechanisms
• Temperature sensing interfaces using thermistor networks

Procurement Notes

Verify the specific ordering suffix matches the required package and tape-and-reel configuration. Confirm that the AEC-Q100 qualification status aligns with your automotive project's reliability requirements. Ensure the SOIC-14 footprint dimensions are compatible with your PCB layout constraints. Check for any recent product change notices regarding material or manufacturing site updates.

Selection Notes

Select this component when high-speed differential comparison is needed in automotive environments. The low quiescent current makes it suitable for battery-powered applications. Consider the open-drain output structure for interfacing with varying logic voltage levels. Verify that the 300 ns propagation delay meets the timing requirements of your specific application circuit.

Part Context

This part belongs to the LM239A family of analog comparators designed for general-purpose and automotive use. It serves as a robust alternative to operational amplifiers configured as comparators. The device integrates multiple comparison functions into a single compact package, reducing board space. Its design focuses on stability and noise immunity for precise threshold detection.

Replacement Considerations

The LM239AQDRQ1 is a confirmed substitute part number offering equivalent functionality and automotive qualification.