LM119J

Overview

The LM119J is a high-speed dual comparator manufactured by Texas Instruments. It operates from a single +5V logic supply or wider voltage ranges up to ±15V. The device features an open-collector output capable of driving loads such as lamps or relays with up to 25mA current. It offers a typical response time of 80ns at ±15V and maintains low input current across the full operating temperature range.

Feature Summary

• High-speed dual comparator design optimized for digital logic power supplies
• Open-collector output compatible with TTL, DTL, RTL, and transistor-transistor logic
• Wide operating voltage range supporting both single and dual power configurations

Applications

• Digital logic power supply monitoring
• Lamp and relay driver circuits
• High-speed signal comparison in mixed-signal systems

Procurement Notes

Verify the specific suffix 'J' indicates the military-grade temperature range (-55°C to 125°C) and ceramic package variant. Confirm RoHS status as older TI variants may not be compliant. Check datasheet revision dates for accurate electrical characteristics. Ensure availability matches current production lifecycle status.

Selection Notes

Select this component when high-speed comparison is required alongside wide voltage tolerance. The open-collector output simplifies interfacing with various logic families. Consider thermal management if driving high-current loads near maximum ratings. Verify pinout compatibility if replacing legacy National Semiconductor parts.

Part Context

The LM119 series belongs to Texas Instruments' family of high-speed comparators, originally developed by National Semiconductor. It serves as a robust alternative to slower general-purpose comparators while offering greater flexibility than fixed-voltage logic devices. The J-package variant provides hermetic sealing suitable for harsh environments.

Replacement Considerations

• LM219J
• LM319J