LM810M3X-4.00/NOPB

Supervisors Overview

The LM810M3X-4.00/NOPB is a voltage supervisor integrated circuit manufactured by Texas Instruments, formerly National Semiconductor. It provides a reset signal for supply monitoring with an active-high, push-pull output. The device features a threshold voltage of 4.00 V and a reset delay time of 840 ms. It operates within a maximum power supply voltage of 5.5 V and consumes a typical quiescent current of 18 uA. The component is available in a SOT-23-3 surface-mount package and supports an operating temperature range from -40°C to +105°C.

Supervisors Feature Summary

• Active-high push-pull reset output for reliable logic interfacing
• Low quiescent current consumption suitable for battery-powered applications
• Integrated manual reset input capability for system control

Supervisors Applications

• Microprocessor and microcontroller supply monitoring
• Battery backup switching circuits
• Watchdog timer supervision

Supervisors Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the specific suffix 'NOPB' indicates lead-free and RoHS compliance. Ensure the ordering code matches the exact threshold voltage and package variant required for the design.

Supervisors Selection Notes

Select this component when a fixed 4.00 V threshold is required for single-supply monitoring. Consider the 840 ms delay for noise immunity. Verify that the active-high output polarity aligns with the target processor's reset pin requirements compared to alternative low-active variants.

Supervisors Part Context

This part belongs to the LM810 series of supervisory circuits. It shares functional characteristics with other members of the family, differentiated primarily by their specific voltage thresholds and output polarities. The series is designed for general-purpose power management in embedded systems.

Supervisors Replacement Considerations

LM810M3-4.00/NOPB