LM239AMDREP

Overview

The LM239AMDREP is a quad differential voltage comparator manufactured by Texas Instruments, designed for operation from a single power supply. It features four independent comparators within a 14-pin SOIC package. The device supports a wide supply voltage range of 2 V to 30 V and operates over an extended temperature range of -55°C to +125°C. Key electrical specifications include a maximum input offset voltage of 2.5 mV, a typical response time of 300 ns, and a quiescent current of 2 mA per channel. The output stage provides open-collector capability with a sink current capacity of up to 6 mA.

Feature Summary

• Quad differential input configuration providing four independent comparison channels in a compact surface-mount package.
• Wide operating supply voltage range supporting both low-voltage and standard industrial applications.
• Open-collector output architecture allowing flexible interfacing with various logic families and voltage levels.
• Extended thermal stability ensuring reliable performance across harsh environmental conditions.

Applications

• Overvoltage and undervoltage detection circuits
• Window comparator designs
• Analog-to-digital conversion interfaces
• Temperature monitoring systems

Procurement Notes

Verify the specific suffix 'REP' indicates military or enhanced reliability standards as defined by Texas Instruments. Confirm RoHS compliance status and moisture sensitivity level prior to procurement. Ensure the SOIC-14 footprint matches the target PCB layout. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and traceability documentation.

Selection Notes

Select this component when multiple independent voltage comparisons are required in a space-constrained design. The open-collector outputs facilitate wired-AND configurations for complex logic functions. Consider the 300 ns propagation delay for timing-sensitive applications. The wide supply voltage range offers flexibility in power system design without requiring additional level shifting components.

Part Context

This device belongs to the LM239A family of quad comparators, which are industry-standard solutions for general-purpose voltage sensing. The LM239 series is widely used in industrial control and consumer electronics due to its balance of performance and cost. The AMDREP variant specifically denotes a qualified version often utilized in defense and aerospace sectors requiring higher reliability standards.

Replacement Considerations

Direct pin-compatible alternatives include the LM239AMDR and LM239N. Verify that substitute parts meet the same -55°C to +125°C temperature range and 30 V maximum supply voltage requirements. Check if the replacement maintains the open-collector output structure and comparable input offset voltage specifications.