LM2903YDT

Overview

The LM2903YDT is an automotive-grade, low-power dual voltage comparator manufactured by STMicroelectronics. It features two independent comparators designed for single-supply operation ranging from +2 V to +36 V, or split supplies of ±1 V to ±18 V. The device operates within a temperature range of -40°C to +125°C and is housed in an SOIC-8 surface-mount package. Key electrical parameters include a typical supply current of 0.4 mA per comparator, a maximum input bias current of 250 nA, and a maximum input offset voltage of 7 mV at 5 V. It supports a typical output saturation voltage of 250 mV at 4 mA and provides a response time of 1.3 µs.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards
• Wide single-supply voltage range or dual supplies capability
• Input common-mode voltage range includes the negative rail
• Outputs compatible with TTL, DTL, ECL, MOS, and CMOS logic families

Applications

• Automotive electronic systems requiring qualified analog components
• Over-voltage and under-voltage detection circuits
• Window comparator configurations
• Temperature sensing interfaces

Procurement Notes

Verify that the specific order matches the LM2903YDT designation, as suffixes indicate package type and tape/reel specifications. Confirm the requirement for AEC-Q100 automotive grade compliance against other variants like the standard LM2903. Ensure the SOIC-8 package dimensions align with the target PCB footprint. Check RoHS and Ecopack3 environmental compliance status for regulatory adherence.

Selection Notes

Select this component when automotive reliability is required alongside low power consumption. The wide supply voltage range accommodates various system architectures without level shifting. Consider the 1.3 µs response time for speed requirements. Compare against the LM2903W if higher ESD protection is needed, or the LM2903H for extended temperature ranges up to 150°C.

Part Context

The LM2903YDT belongs to the LM2903x family of dual voltage comparators. It shares functional similarities with the LM193, LM293, and LM393 series but offers specific automotive grading. Unlike the LM393W which provides enhanced ESD robustness, the LM2903YDT focuses on automotive qualification. It is distinct from the LM2903H, which supports higher operating temperatures.

Replacement Considerations

The LM2903W is a verified alternative offering higher ESD performance. The LM2903H serves as a substitute for applications requiring operation up to 150°C. Cross-reference pinouts and electrical characteristics carefully when substituting.