LM293H/NOPB

Overview

The LM293H/NOPB is a dual differential analog comparator manufactured by Texas Instruments. It features a low power consumption profile with an operating supply current of 500 uA and supports a wide supply voltage range from 2 V to 30 V. The device provides a response time of 300 ns and delivers an output current of 6 mA per channel. It exhibits a typical input offset voltage of 5 mV and an input bias current of 250 nA. The component operates within a temperature range of -25°C to +85°C and is housed in an 8-pin TO-99 metal can package.

Feature Summary

• Dual differential configuration for precise signal comparison
• Low power operation suitable for battery-constrained applications
• Wide single-supply voltage capability up to 30 V
• CMOS/TTL compatible output interface

Applications

• Window detector circuits
• Voltage monitoring systems
• Temperature sensing interfaces
• Over-voltage protection logic

Procurement Notes

Verify the specific suffix H indicates the TO-99-8 metal can package variant, distinct from plastic packages like DIP or SOIC. Confirm RoHS compliance status via the manufacturer's official documentation as regulatory requirements may vary by production batch. Ensure the NOPB designation confirms lead-free manufacturing processes consistent with current environmental standards before finalizing procurement orders.

Selection Notes

Select this component when high precision is required due to its low 5 mV input offset voltage specification. The TO-99 package offers superior thermal stability and hermetic sealing compared to standard plastic alternatives, making it suitable for harsh environments. Consider the 300 ns response time against system speed requirements and ensure the 6 mA output current meets load driving needs without external buffering.

Part Context

This part belongs to the LM293 family of dual comparators, designed for general-purpose analog switching tasks. Unlike operational amplifiers, it lacks internal frequency compensation, optimizing it for fast open-loop operation. The LM293H/NOPB specifically utilizes a hermetic metal can package, providing enhanced reliability and radiation hardness characteristics compared to non-hermetic plastic variants found in the same product line.

Replacement Considerations

LM293C/NOPB: Plastic package alternative with similar electrical characteristics but different thermal and mechanical properties. LM293J/NOPB: Military grade version with extended temperature range and stricter parameter tolerances. Verify pinout compatibility and package dimensions when substituting to ensure physical fit on existing PCB layouts.