LM339AM

Overview

The LM339AM is a quad analog comparator manufactured by Texas Instruments, housed in a 14-pin SOIC surface-mount package. It operates on a single supply voltage ranging from 2V to 36V or dual supplies of ±1V to ±18V. The device features four independent differential comparators with open-collector outputs capable of sinking up to 16mA at 5V. Key electrical parameters include a maximum input offset voltage of 5mV, an input bias current of 250nA, and a typical response time of 1.3µs. It functions within a commercial temperature range of 0°C to 70°C.

Feature Summary

• Integrates four independent high-gain differential comparators for multi-channel signal processing.
• Features open-collector outputs compatible with various logic families and pull-up voltages.
• Operates effectively across a wide single or split power supply voltage range.

Applications

• Over-voltage and under-voltage detection circuits
• Analog-to-digital conversion interfaces
• Temperature sensing threshold monitoring

Procurement Notes

Verify the specific suffix against official manufacturer documentation to confirm pinout compatibility and electrical tolerances. Ensure the component meets RoHS requirements if applicable to your assembly process. Cross-reference datasheet revisions to validate performance characteristics before finalizing procurement specifications.

Selection Notes

Select this component when multiple independent comparison channels are required in a compact surface-mount footprint. Consider the open-collector output structure for level shifting applications. Evaluate the 1.3µs propagation delay against system timing requirements to ensure adequate speed for the intended signal frequencies.

Part Context

This part belongs to the LM339 family of low-power quad comparators. It shares functional similarities with through-hole variants like the LM339N but utilizes a small-outline integrated circuit package for automated surface-mount assembly. The device is widely used in industrial control systems and consumer electronics requiring reliable voltage threshold detection.

Replacement Considerations

LM339MX/NOPB

FAQ

What is the output configuration of the LM339AM?

The LM339AM utilizes open-collector outputs for all four comparators, requiring external pull-up resistors to define the high logic level.

Does the LM339AM support dual power supplies?

Yes, the device supports dual supplies ranging from ±1V to ±18V, in addition to single supplies from 2V to 36V.