LM193DT

Overview

The LM193DT is a dual low-voltage comparator manufactured by STMicroelectronics, housed in an 8-pin SOIC surface-mount package. It features two independent comparators designed for single-supply operation across a wide voltage range of 2V to 36V, or split supplies from ±1V to ±18V. The device includes open-collector outputs compatible with TTL, DTL, ECL, MOS, and CMOS logic families. Key electrical characteristics include a typical supply current of 0.45mA, input bias current of 20nA, and a response time of 1.3μs.

Feature Summary

• Dual independent comparators optimized for single-supply operation
• Wide operating voltage range supporting both single and split power supplies
• Open-collector output configuration ensuring compatibility with various logic families
• Input common-mode voltage range extends to ground potential

Applications

• General-purpose signal comparison circuits
• Voltage monitoring systems
• Logic level shifting interfaces
• Temperature sensing threshold detection

Procurement Notes

Verify the specific suffix 'DT' corresponds to the standard SOIC-8 tape-and-reel packaging format required for automated assembly processes. Confirm that the component meets RoHS3 compliance standards as indicated in distributor documentation. Ensure the ordering quantity aligns with the manufacturer's standard reel sizes to avoid partial reel handling issues during production integration.

Selection Notes

Select this component when designing circuits requiring dual comparators with ground-referenced input capabilities under single-supply conditions. The open-collector output necessitates external pull-up resistors tailored to the target logic voltage levels. Consider the 1.3μs propagation delay for timing-sensitive applications and verify that the 36V maximum supply rating accommodates system voltage fluctuations without exceeding absolute maximum ratings.

Part Context

The LM193DT belongs to the LM193/LM293/LM393 family of low-voltage comparators. This series is engineered for cost-effective performance in consumer electronics and industrial control applications where space constraints favor surface-mount packaging. The DT suffix specifically denotes the plastic small-outline integrated circuit (SOIC) package variant, distinguishing it from through-hole or wider body packages within the same functional family.

Replacement Considerations

Compatible substitutes include the LM293DT and LM393DT, which share identical pinouts and electrical specifications. Verify that alternative sources maintain the same SOIC-8 footprint and thermal characteristics to ensure direct board-level interchangeability without redesigning the surrounding passive components.