LM339M

Overview

The LM339M is a quad differential 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 an open-collector output 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 propagation delay of 1.3µs. The operating temperature range extends from 0°C to 70°C with a maximum power dissipation of 760mW.

Feature Summary

• Integrates four independent high-gain differential comparators within a single compact package for space-constrained designs.
• Features open-collector outputs that facilitate direct interfacing with various logic families and allow wired-AND configurations.
• Operates effectively across a wide common-mode voltage range that includes ground, enabling versatile signal conditioning applications.

Applications

• Over-voltage and under-voltage detection circuits
• Temperature sensing and control systems
• Automatic gain control loops

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm pinout compatibility and electrical tolerances. Ensure the selected variant matches the required thermal management specifications for the intended operating environment. Cross-reference datasheet revisions to validate parameter consistency before finalizing component selection.

Selection Notes

Select this component when a low-cost, general-purpose quad comparator is required for standard industrial or consumer electronics. Consider the open-collector output limitation which necessitates external pull-up resistors for proper logic level generation. Evaluate the 1.3µs response time against system speed requirements to ensure adequate performance margins.

Part Context

This part belongs to the LM139/LM239/LM339 family of low-power voltage comparators. The 'M' suffix specifically denotes the SOIC surface-mount package option. This family is widely recognized for its cost-effectiveness and reliability in basic threshold detection tasks across diverse electronic industries.

Replacement Considerations

LM339MX/NOPB serves as a verified equivalent substitute offering identical functionality and pinout compatibility within the same product family.