LM339AM/NOPB

Overview

The LM339AM/NOPB is a quad differential analog comparator manufactured by Texas Instruments. It features four independent channels within a single package, designed for low power and low offset voltage applications. The device operates with a supply voltage range of 2 V to 36 V or ±1 V to ±18 V. It utilizes an open-collector output configuration compatible with various logic families. The component supports through-hole mounting in a 14-pin PDIP package and 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
• Operates over a wide single or dual supply voltage range up to 36 V
• Features low input bias current and low offset voltage for accurate threshold detection
• Provides open-collector outputs suitable for wired-AND configurations and level shifting

Applications

• Over-voltage and under-voltage detection circuits
• Temperature sensing and control systems
• Level shifting between different voltage domains
• Peak hold circuits and pulse width modulation generation

Procurement Notes

Verify the specific suffix 'AM' indicates the military temperature grade variant (-55°C to +125°C) rather than the standard commercial grade (0°C to +70°C). Confirm RoHS compliance status associated with the NOPB designation. Ensure the ordering part number matches the required package type and thermal rating before procurement.

Selection Notes

Select this component when multiple independent comparison functions are required in a compact form factor. Consider the open-collector output limitation which necessitates external pull-up resistors for proper logic high levels. Evaluate the response time requirements against the typical propagation delay specifications provided in the datasheet.

Part Context

This part belongs to the LM339 family of quad comparators, widely used in industrial and consumer electronics. The LM339 series serves as a standard solution for general-purpose voltage monitoring tasks. Variants differ primarily in temperature ranges and packaging options while maintaining core electrical characteristics.

Replacement Considerations

• LM339AN/NOPB
• LM339DRG4

FAQ

What is the difference between LM339A and LM339?

The LM339A typically denotes a version with tighter specifications for parameters such as input offset voltage and bias current compared to the standard LM339.

Can the outputs be connected together?

Yes, the open-collector outputs can be tied together to create a wired-AND logic function, provided appropriate pull-up resistors are used.