LM293H

Overview

The LM293H is a dual differential comparator from Texas Instruments, housed in an 8-pin TO-99 metal can package. It operates on a single supply voltage ranging from 2 V to 36 V or split supplies up to ±18 V. The device features a low quiescent current of 500 uA and a typical response time of 700 ns. Input characteristics include a maximum input offset voltage of 5 mV and an input bias current of 250 nA. Each output channel provides a sink current capability of 6 mA. The component functions within a commercial temperature range of -25°C to +85°C.

Feature Summary

• Dual differential configuration for independent signal comparison
• Rail-to-rail output capability compatible with CMOS and TTL logic families
• Low power consumption suitable for battery-operated applications
• Metal can packaging providing robust environmental protection

Applications

• Precision voltage monitoring circuits
• Threshold detection systems
• Waveform generation and shaping
• Logic level translation interfaces

Procurement Notes

Verify the specific suffix designation, such as NOPB, to confirm lead-free compliance and manufacturing origin. Ensure the TO-99-8 package variant matches the required thermal and mechanical constraints of the target assembly. Confirm that the operating voltage range aligns with the system's power supply architecture before finalizing the order.

Selection Notes

Select this component when low offset voltage and rail-to-rail output are critical requirements. The TO-99 package offers superior shielding compared to plastic variants. Consider the 700 ns response time against application speed needs. Verify that the 6 mA output drive current suffices for the connected load without external buffering.

Part Context

This part belongs to the LM293 family of low-power comparators. It shares functional similarities with the LM293P but utilizes a hermetic metal can package instead of plastic DIP. The LM293H provides enhanced stability and noise immunity due to its construction. It serves as a direct replacement for standard dual comparators requiring high reliability.

Replacement Considerations

The LM293H/NOPB is the explicit lead-free version of the LM293H. Cross-reference with LM293P for pin-compatible plastic alternatives if package changes are permissible. Verify electrical parameters against LM193H for extended temperature range requirements.