LM809M3X-2.63

Supervisors Overview

The LM809M3X-2.63/NOPB is a voltage supervisory circuit manufactured by Texas Instruments, designed for monitoring single-input power supplies. It operates within a supply voltage range up to 5.5 V and features an active-low, push-pull output type. The device provides a fixed threshold voltage of 2.63 V with a reset delay time of 240 ms. It is housed in a SOT-23-3 package and supports surface-mount installation. The component functions without manual reset or watchdog timer capabilities and lacks battery backup switching. It is rated for operation between -40°C and +105°C.

Supervisors Feature Summary

• Provides active-low, push-pull reset signaling for monitored supply rails
• Operates as a simple supervisor without manual reset or watchdog timer integration
• Supports surface-mount installation in a compact three-pin SOT-23 package

Supervisors Applications

• Supply voltage monitoring in embedded systems
• Power management supervision in industrial control units
• Reset generation for microcontrollers operating at low voltages

Supervisors Procurement Notes

Verify the exact suffix against official manufacturer documentation to confirm pinout and electrical characteristics. Ensure the NOPB designation aligns with RoHS compliance requirements for your specific manufacturing process. Cross-reference the threshold voltage value with system design specifications to guarantee accurate reset triggering under all operating conditions.

Supervisors Selection Notes

Select this component when a low-voltage threshold near 2.63 V is required for system reset logic. Consider the active-low output polarity and push-pull drive capability for direct interface with digital inputs. Evaluate the 240 ms reset delay against system startup timing requirements to ensure stable initialization before processor execution begins.

Supervisors Part Context

This part belongs to the LM809 series of voltage supervisors from Texas Instruments. The series offers various fixed threshold options to accommodate different supply rail standards. The LM809 family is characterized by its simplicity, requiring minimal external components while providing reliable reset signals for digital logic circuits in consumer and industrial applications.

Supervisors Replacement Considerations

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