NCP303LSN33T1

Supervisors Overview

The NCP303LSN33T1 is a single-channel voltage supervisor circuit manufactured by onsemi, designed for monitoring power supply integrity in electronic systems. It operates within a wide supply voltage range of 0.8 V to 10 V and features a typical quiescent current of 0.5 μA. The device provides an active-low open-drain reset output with a fixed threshold voltage of 3.3 V, exhibiting a monitoring accuracy of 2%. It supports programmable reset delay times and includes battery backup switching functionality. The component is housed in a compact TSOP-5 surface-mount package and is rated for operation across an extended temperature range from -40°C to +125°C.

Supervisors Feature Summary

• Provides reliable power-fail detection with a fixed 3.3 V threshold and 2% accuracy for stable system supervision.
• Features low power consumption with a typical operating current of 0.5 μA, suitable for energy-efficient designs.
• Includes battery backup switching capability to ensure seamless transition between primary and secondary power sources.

Supervisors Applications

• Portable consumer electronics requiring low standby current
• Battery-powered devices needing backup power management
• Embedded systems requiring simple power-on reset signals

Supervisors Procurement Notes

Verify the specific suffix and manufacturing date code when sourcing this component, as availability may vary due to lifecycle status. Confirm RoHS compliance details against the latest datasheet revision, as older batches might differ. Ensure the TSOP-5 footprint matches your PCB design constraints. Cross-reference part numbers carefully to distinguish between T1 and T1G variants if applicable. Check for obsolescence notices or last-time buy information from authorized distributors before finalizing procurement plans.

Supervisors Selection Notes

Select this component when a fixed 3.3 V monitoring threshold is required without the need for adjustable settings. It is appropriate for applications prioritizing low quiescent current over high-speed response times. Consider the TSOP-5 package size for space-constrained layouts. Verify that the open-drain output interface aligns with the downstream logic requirements. This device is suitable where battery backup switching is necessary but watchdog timers are not needed.

Supervisors Part Context

This part belongs to the NCP303 series of voltage supervisors from onsemi, which offers various fixed threshold options. The series is characterized by low power consumption and compact packaging. Other members include different voltage thresholds such as 1.4 V, 2.3 V, and 4.4 V. The NCP303LSN33T1 specifically targets the 3.3 V rail monitoring niche within portable and industrial applications.

Supervisors Replacement Considerations

Direct substitutes include other NCP303 series parts with similar voltage ratings, such as NCP303LSN33T1G, ensuring identical pinout and electrical characteristics. Verify compatibility with existing PCB footprints and thermal requirements. Check for any changes in reset delay programming options or output drive strength when considering alternative manufacturers.