LM293DRE4

Overview

The LM293DRE4 is a dual differential voltage comparator manufactured by Texas Instruments, belonging to the LMx93 series. It features two independent comparison units housed in an SOIC-8 surface-mount package. The device operates on a single power supply ranging from 2V to 30V or dual supplies of ±1V to ±15V. Key electrical parameters include a maximum input offset voltage of 5mV, a typical quiescent current of 500µA, and an output short-circuit current capability of 6mA. The unit supports a common-mode input voltage range that includes ground and provides open-collector outputs compatible with CMOS and TTL logic families.

Feature Summary

• Dual differential voltage comparison architecture for signal threshold detection
• Open-collector output configuration allowing flexible logic level interfacing
• Wide single-supply operating voltage range accommodating diverse power systems
• Common-mode input voltage range extends to ground potential

Applications

• Over-voltage and under-voltage protection circuits
• Battery monitoring and low-battery detection systems
• Temperature and physical sensor threshold switching
• Waveform generation and pulse width modulation control

Procurement Notes

Verify the suffix 'E4' indicates lead-free construction compliant with RoHS standards. Confirm the SOIC-8 package dimensions match PCB footprint requirements. Ensure the open-collector output design aligns with system pull-up resistor specifications. Validate that the operating temperature range meets environmental constraints.

Selection Notes

Select this component when dual independent comparators are required within a compact surface-mount form factor. The wide supply voltage range suits applications powered by varying battery levels or unregulated sources. The open-collector output facilitates wired-OR configurations without additional logic gates. Consider the propagation delay characteristics against specific switching speed requirements.

Part Context

This part belongs to the LMx93 family of dual comparators, which also includes variants like the LM293, LM393, and LM2903. These devices share similar functional architectures but may differ in temperature ranges, pinout compatibility, or specific electrical tolerances. The LM293DRE4 specifically denotes the industrial-grade version with lead-free packaging in the standard SOIC-8 format.

Replacement Considerations

LM293DR serves as a direct functional equivalent within the same product line. LM393DR offers identical pinouts and electrical characteristics with potentially different manufacturing origins. LM2903DR provides comparable performance with guaranteed operation down to zero volts common-mode input.