LM2903WHYST

Overview

The LM2903WHYST is a dual low-power voltage comparator manufactured by STMicroelectronics, housed in an 8-MiniSO surface-mount package. It operates from a single supply of 2 V to 36 V or split supplies of ±1 V to ±18 V. Key electrical parameters include a typical supply current of 0.4 mA, input bias current of 25 nA, and input offset voltage of 7 mV. The device features a response time of 1.3 µs and supports output currents up to 16 mA per channel. It is qualified under AEC-Q100 standards for automotive applications and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Dual independent comparators designed for wide single or split supply operation
• Low power consumption with supply current independent of voltage
• 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 AEC-Q100 qualified components
• General-purpose analog signal comparison circuits
• Voltage monitoring and threshold detection applications
• Battery management and power supply control systems

Procurement Notes

Verify the specific suffix WHYST against official STMicroelectronics documentation to confirm the MiniSO-8 packaging and reel specifications. Ensure compatibility with AEC-Q100 automotive qualification requirements if used in vehicle electronics. Cross-reference datasheet revisions to confirm pinout consistency and operating temperature ranges before integration into final designs.

Selection Notes

Select this component when dual comparators are needed with low static power consumption and wide supply voltage flexibility. The MiniSO-8 package suits space-constrained surface-mount designs. Consider the 1.3 µs response time and 7 mV offset voltage for precision requirements. Verify that the open-collector/rail-to-rail output characteristics align with the downstream logic interface needs.

Part Context

This part belongs to the LM2903 family of low-power dual voltage comparators. It shares functional similarities with the LM2903W and LM2903H but differs in packaging and thermal characteristics. The WHYST variant specifically denotes the MiniSO-8 form factor and automotive-grade reliability, distinguishing it from standard industrial versions like the LM2903N or LM2903DR.

Replacement Considerations

Direct substitutes include other LM2903 variants such as LM2903WYDT or LM2903BYST, provided the package type matches the design constraints. Verify that alternative parts maintain the same AEC-Q100 qualification and MiniSO-8 footprint for seamless replacement without PCB redesign.