LM809M3X-4.63/NOPB

Supervisors Overview

The LM809M3X-4.63/NOPB is a voltage supervisory circuit manufactured by Texas Instruments, designed for monitoring single power supply rails in electronic systems. It operates within a maximum supply voltage of 5.5 V and features an active-low, push-pull output configuration to ensure reliable signal transmission. The device provides a fixed reset threshold voltage of 4.63 V, triggering the reset signal when the monitored voltage falls below this level. A standard reset delay time of 240 ms is included to prevent false triggering during power-up or transient conditions. The component supports surface-mount installation in a SOT-23-3 package and is rated for operation across an extended temperature range from -40°C to +105°C.

Supervisors Feature Summary

• Provides precise voltage supervision with a fixed 4.63 V threshold for accurate power rail monitoring
• Features an active-low, push-pull output stage for robust interface compatibility with digital logic
• Includes a built-in 240 ms reset delay timer to filter out noise and ensure stable system initialization

Supervisors Applications

• Microcontroller and processor power supply monitoring
• Battery-operated devices requiring low-voltage detection
• Industrial control systems needing reliable reset signals
• Portable electronics utilizing single-supply architectures

Supervisors Procurement Notes

Verify that the specific suffix 'NOPB' confirms lead-free compliance and RoHS standards as required by your manufacturing regulations. Ensure the ordering part number matches exactly, including the thermal pad and reel specifications if applicable. Confirm that the 4.63 V threshold aligns with your system's minimum operating voltage requirements before finalizing procurement. Cross-reference the manufacturer datasheet for any recent updates regarding pinout or electrical characteristics to avoid integration errors.

Supervisors Selection Notes

Select this component when a fixed 4.63 V threshold is required for a single-channel voltage supervisor. Consider the SOT-23-3 package size constraints and the need for an active-low push-pull output interface. Evaluate the 240 ms reset delay against your system's startup timing requirements to ensure adequate stabilization. Verify that the 5.5 V maximum supply voltage accommodates your highest expected input voltage without exceeding limits.

Supervisors Part Context

This part belongs to the LM809 series of voltage supervisory circuits from Texas Instruments. The series offers various threshold voltages to suit different power rail requirements while maintaining consistent performance characteristics. The LM809 family is designed for applications requiring simple, cost-effective reset generation without manual intervention or watchdog functionality. It serves as a fundamental building block for ensuring system reliability in embedded designs.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.