NCP303LSN42T1G

Supervisors Overview

The NCP303LSN42T1G is a voltage detector supervisory circuit manufactured by onsemi, designed for monitoring single-input power rails. It features a fixed threshold voltage of 4.2 V with an accuracy of 2%. The device operates within a supply voltage range of 800 mV to 10 V and draws a typical quiescent current of 500 nA. It provides an active low, open-drain reset output with programmable reset delay time. The component is housed in a TSOP-5 surface-mount package and supports battery backup switching functionality without manual reset or watchdog timer capabilities.

Supervisors Feature Summary

• Provides active low open-drain reset signal generation based on monitored input voltage levels
• Supports battery backup switching to maintain system state during power transitions
• Features programmable reset delay time to accommodate specific timing requirements
• Operates with low quiescent current consumption suitable for power-sensitive applications

Supervisors Applications

• Portable electronic devices requiring reliable power supervision
• Battery-powered systems needing backup switching functionality
• Embedded controllers requiring voltage monitoring and reset generation
• Industrial equipment operating across extended temperature ranges

Supervisors Procurement Notes

Verify component authenticity through authorized distribution channels due to potential counterfeit risks. Confirm RoHS compliance status and manufacturing origin prior to integration. Check for obsolescence notices as this part may be subject to end-of-life management. Ensure packaging specifications match assembly requirements. Validate electrical parameters against latest datasheet revisions before final design approval.

Supervisors Selection Notes

Select this component when a fixed 4.2 V threshold detection is required for single-rail monitoring. Consider the TSOP-5 package constraints for PCB layout optimization. Evaluate the programmable delay feature against system startup timing needs. Compare quiescent current specifications with other supervisors if ultra-low power operation is critical. Verify compatibility with downstream logic levels given the open-drain output configuration.

Supervisors Part Context

This voltage detector belongs to the NCP303 series from onsemi, which offers various threshold options for power management applications. The series is characterized by low power consumption and compact packaging solutions. Related parts include variants with different threshold voltages such as NCP303LSN47T1G and NCP303LSN44T1G, allowing designers to select appropriate trip points for specific supply rail monitoring requirements.

Supervisors Replacement Considerations

NCV303LSN42T1G serves as a qualified automotive-grade alternative within the same family.