LM2903YST

Overview

The LM2903YST is a dual low-power voltage comparator manufactured by STMicroelectronics, designed for operation from a single power supply over a wide voltage range or multiple split supplies. It features an input common-mode voltage range that includes the negative rail, even when powered by a single supply. The device offers outputs compatible with TTL, DTL, ECL, MOS, and CMOS logic families. It is qualified under AEC-Q100 standards for automotive applications and operates within a temperature range of -40°C to +125°C.

Feature Summary

• Dual independent low-power voltage comparators optimized for single-supply wide voltage range operation
• Input common-mode voltage range extends to include the negative supply rail
• Output compatibility with various logic families including TTL, DTL, ECL, MOS, and CMOS
• Automotive qualification compliant with AEC-Q100 standards

Applications

• Automotive electronic systems requiring robust voltage comparison
• Industrial control circuits utilizing single-supply architectures
• Transducer signal conditioning and DC gain block implementations
• General-purpose analog signal processing in harsh environments

Procurement Notes

Verify the specific suffix 'YST' against the manufacturer's official documentation to confirm the exact package type and tape-and-reel specifications. Ensure the component meets the required AEC-Q100 automotive grade standards for your target application environment. Cross-reference the datasheet revision date to confirm parameter consistency before finalizing procurement orders.

Selection Notes

Select this component when a dual comparator with low power consumption and wide single-supply voltage tolerance is required. The inclusion of the negative rail in the input common-mode range simplifies circuit design for ground-referenced signals. Consider the AEC-Q100 qualification if the deployment environment demands automotive-grade reliability and thermal stability.

Part Context

This device belongs to the LM2903x series of low-power dual voltage comparators. It shares functional similarities with other members of the family but is distinguished by its specific packaging and automotive qualification status. The series is engineered for cost-effective solutions in consumer, industrial, and automotive sectors where power efficiency and wide operating voltage ranges are critical design constraints.

Replacement Considerations

Consult the manufacturer's datasheet for direct pin-compatible alternatives such as the LM2903W, which offers enhanced ESD performance. Verify that any substitute maintains the same AEC-Q100 qualification and operational temperature range to ensure system compatibility without redesign.