LM219J

Overview

The LM219J is a dual high-speed comparator manufactured by Texas Instruments, housed in a 14-CDIP package. It operates within a supply voltage range of 5V to 36V single or ±2.5V to ±18V dual. Key electrical specifications include a maximum input offset voltage of 7mV and a maximum input bias current of 1µA at ±15V. The device features an open-collector output compatible with DTL, TTL, RTL, and ECL logic families. It supports a typical response time of 80ns and functions across a temperature range of -25°C to 85°C.

Feature Summary

• Dual independent comparators designed for high-speed operation
• Open-collector outputs compatible with multiple logic families including TTL and DTL
• Wide operating supply voltage range supporting single and dual power sources
• Low input bias current ensuring minimal loading on signal sources

Applications

• High-speed digital logic interfacing
• Precision voltage monitoring circuits
• Waveform generation and shaping
• Threshold detection systems

Procurement Notes

Verify component authenticity through authorized distributors as the LM219J may be considered obsolete or discontinued in some regions. Confirm RoHS compliance status, as standard ceramic DIP versions often lack lead-free certification. Ensure the specific suffix matches the required package type and that the supplier provides valid traceability documentation for critical applications.

Selection Notes

Select the LM219J when high-speed comparison is required alongside compatibility with traditional transistor-transistor logic levels. Consider its wide supply voltage tolerance for systems requiring flexibility between low-voltage digital and higher-voltage analog domains. Evaluate the trade-off between its faster response time compared to older counterparts against its higher quiescent current consumption requirements.

Part Context

The LM219J belongs to the LM119/LM219/LM319 family of precision high-speed comparators. This series is characterized by its ability to operate from standard logic supplies while maintaining performance suitable for analog signal processing. The J suffix denotes the military-grade temperature range and ceramic package variant, distinguishing it from commercial plastic equivalents.

Replacement Considerations

Direct pin-compatible substitutes include the LM119N and LM319N for commercial temperature ranges. For hermetic packages, verify availability of LM119H or LM319H equivalents. Ensure replacement parts maintain the same open-collector output configuration and logic compatibility requirements.