LM2903WST

Overview

The LM2903WST is a dual low-power voltage comparator manufactured by STMicroelectronics, housed in an SOIC-8 surface-mount package. It operates on a single supply voltage ranging from +2 V to +36 V or dual supplies of ±1 V to ±18 V. The device features a typical quiescent current of 0.4 mA and a maximum input bias current of 25 nA. Key electrical parameters include a maximum input offset voltage of 7 mV, a response time of 1.3 µs, and an output short-circuit current capability of 16 mA. It supports operation across an extended temperature range from -40°C to +125°C.

Feature Summary

• Dual independent comparators designed for wide voltage range applications
• Input common-mode voltage includes the negative rail
• Output logic compatible with TTL, DTL, ECL, MOS, and CMOS families
• Low power consumption with supply current independent of voltage

Applications

• Battery-powered systems requiring low standby current
• Temperature sensing circuits using thermistors
• Over-voltage and under-voltage detection modules
• Window comparator configurations for signal monitoring

Procurement Notes

Verify the specific suffix 'WST' against the manufacturer's official datasheet to confirm pinout compatibility and tape-and-reel specifications. Ensure the component meets the required RoHS compliance standards for your target market. Cross-reference the ordering code with authorized distributors to validate authenticity and traceability before finalizing procurement contracts.

Selection Notes

Select this component when a dual-channel solution is required within a compact SOIC-8 footprint. It is suitable for designs needing rail-to-rail input common-mode capability relative to the negative supply. Consider its low input bias current for high-impedance sensor interfaces. Verify that the 1.3 µs propagation delay meets the timing requirements of the application circuit.

Part Context

This part belongs to the LM2903 family of analog comparators. It shares functional similarities with other variants like the LM2903YDT but differs in packaging and specific manufacturing lot characteristics. The WST designation indicates a specific reel-based packaging format intended for automated surface-mount assembly processes.

Replacement Considerations

Consult the official datasheet for direct pin-compatible alternatives within the same series. Verify that any substitute maintains the same SOIC-8 package dimensions and electrical characteristics.