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LM339PWR

LM339PWR Description

The LM339PWR from ROHM Semiconductor is a quad general-purpose voltage comparator housed in a 14-pin TSSOP package, designed for surface-mount applications. This IC operates over a wide supply voltage range (2V to 36V single or ±1V to ±18V dual), making it versatile for various analog and digital systems. With a low input bias current (0.25µA @ 5V) and moderate input offset voltage (7mV max @ 5V), it ensures reliable precision in comparison tasks. The device is RoHS3 compliant and rated for operating temperatures of 0°C to 70°C, suitable for industrial and consumer electronics. Though marked as obsolete, it remains a robust choice for legacy designs due to its proven performance.

LM339PWR Features

• Quad Comparator Design: Four independent comparators in a single package, reducing board space and cost.
• Wide Voltage Range: Supports 2V–36V single or ±1V–±18V dual supplies, accommodating diverse power configurations.
• Low Power Consumption: Quiescent current ≤2mA, ideal for battery-operated devices.
• High Input Impedance: 0.25µA max input bias current minimizes loading effects on signal sources.
• Surface-Mount Ready: TSSOP-14 package with tape-and-reel (TR) packaging for automated assembly.
• Robust Compliance: ROHS3 and REACH unaffected, meeting environmental standards.

LM339PWR Applications

• Voltage Monitoring: Over/under-voltage detection in power supplies and battery management systems.
• Signal Conditioning: Window comparators for threshold detection in sensor interfaces.
• Oscillators & Timers: Used in relaxation oscillators or pulse-width modulation (PWM) circuits.
• Industrial Control: Logic level shifting and motor drive fault detection.
• Consumer Electronics: Key debouncing, zero-crossing detection in appliances.

Conclusion of LM339PWR

The LM339PWR excels in cost-sensitive, space-constrained designs requiring multiple comparators with wide voltage flexibility and low power draw. While obsolete, its reliability, ease of integration, and compliance with modern standards make it a pragmatic choice for legacy or low-risk applications. Engineers favor it for analog signal processing, industrial controls, and portable electronics where proven performance outweighs the need for newer alternatives.