STMicroelectronics

LM219D

LM219D Description

The LM219D from STMicroelectronics is a dual general-purpose comparator designed for precision analog signal processing. Packaged in a 14-pin SOIC (Tube), this obsolete but still relevant IC operates over a wide supply voltage range of 5V to 30V (single) or ±2.5V to ±15V (dual), making it versatile for various industrial and automotive applications. With a low input offset voltage (max 4mV @ ±15V) and minimal input bias current (0.5µA @ ±15V), the LM219D ensures high accuracy in signal comparison tasks. Its ROHS3 compliance and REACH unaffected status highlight its adherence to environmental standards, while its MSL 1 (Unlimited) rating ensures reliability in storage and handling.

LM219D Features

• Dual Comparator Configuration: Two independent comparators in a single package, reducing board space and cost.
• Wide Supply Range: Supports 5V–30V (single) or ±2.5V–±15V (dual), ideal for mixed-voltage systems.
• Low Power Consumption: Quiescent current max 11.5mA, balancing performance and energy efficiency.
• High Precision: 4mV max offset voltage and 0.5µA input bias current ensure reliable signal comparison.
• Robust Packaging: 14-pin SOIC (Tube) for easy surface-mount assembly and thermal management.
• Environmental Compliance: ROHS3 Compliant and REACH Unaffected, meeting global regulatory standards.

LM219D Applications

The LM219D excels in precision-critical and industrial environments, including:

• Voltage Monitoring: Detecting threshold crossings in power supplies or battery management systems.
• Signal Conditioning: Comparing sensor outputs in automotive or industrial control systems.
• Window Comparators: Used in safety circuits to ensure signals remain within defined limits.
• Analog-to-Digital Interfaces: Serving as a front-end for ADCs in data acquisition systems.
• Oscillators & Pulse Generators: Timing applications where fast response and accuracy are critical.

Conclusion of LM219D

Though marked obsolete, the LM219D remains a robust choice for engineers needing high-precision, dual comparators with wide voltage flexibility. Its low offset, minimal bias current, and industrial-grade reliability make it suitable for legacy designs or replacements in automotive, industrial, and instrumentation applications. For systems requiring stable performance under varying conditions, the LM219D delivers consistent results while adhering to stringent environmental standards.