LM393DR

Overview

The LM393DR is a dual-channel analog comparator manufactured by Texas Instruments, housed in an 8-pin SOIC surface-mount package. It operates on a single supply voltage ranging from 2V to 30V or dual supplies up to ±15V. The device features open-collector outputs compatible with TTL and CMOS logic families. Key electrical parameters include a typical response time of 1.3μs, a maximum input offset voltage of 5mV, and a quiescent current of 2.5mA. It functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Dual independent high-precision voltage comparators integrated into a single low-power IC
• Open-collector output stage allows flexible interfacing with various digital logic families
• Wide single-supply operating voltage range suitable for diverse power environments
• Common-mode input voltage extends to ground level for near-zero signal detection

Applications

• Battery voltage monitoring and under-voltage protection circuits
• Over-voltage and over-current limit detection systems
• Window comparator configurations for alarm threshold monitoring
• Square wave and pulse generation using RC timing networks
• Level shifting interfaces between different logic voltage domains

Procurement Notes

Verify the specific manufacturer datasheet revision to confirm pinout consistency and electrical limits. Ensure the application circuit includes appropriate pull-up resistors connected to the desired logic voltage rail, as the open-collector outputs require external termination to function correctly. Confirm that the operating environment remains within the specified commercial temperature range of 0°C to +70°C for reliable performance.

Selection Notes

Select this component when a cost-effective dual comparator solution is required for general-purpose signal switching. It is suitable for applications where moderate speed is acceptable and wide supply voltage flexibility is necessary. Consider alternative variants if extended industrial temperature ranges or lower propagation delays are strictly required for the specific design constraints.

Part Context

This part belongs to the standard LM393 family of dual comparators produced by Texas Instruments. It shares functional characteristics with industry-standard equivalents but is distinguished by its specific packaging and manufacturing origin. The DR suffix indicates the SOIC-8 surface-mount package variant, designed for automated assembly processes in modern electronic manufacturing.

Replacement Considerations

LM2903: Industrial temperature grade version with extended range. LM193: Military grade version with wider temperature specifications. TLV1701: Rail-to-rail input/output alternative for low-voltage applications.