LM809M3-4.63

Supervisors Overview

The LM809M3-4.63/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 reset output. The device provides a threshold voltage of 4.63 V with 5% accuracy and includes a reset delay time of 840 ms. It is housed in a SOT-23-3 surface-mount package and supports operation across a temperature range from -40°C to +105°C.

Supervisors Feature Summary

• Provides active-low, push-pull reset signal generation for monitored supply voltages
• Ensures reliable system recovery through configurable reset delay timing
• Operates efficiently with low quiescent current consumption

Supervisors Applications

• Portable equipment requiring battery backup supervision
• Microprocessor-based systems needing power-on reset functions
• Industrial control systems operating in wide temperature ranges

Supervisors Procurement Notes

Verify the specific suffix configuration against the manufacturer datasheet to ensure compatibility with required threshold voltages and output polarities. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may vary by region. Ensure proper handling procedures are followed for the SOT-23-3 package during assembly.

Supervisors Selection Notes

Select this component when a fixed 4.63 V threshold is required for single-channel voltage monitoring. Consider the active-low output polarity and 840 ms delay duration relative to system startup requirements. Evaluate thermal performance and package constraints against PCB layout limitations before finalizing the design.

Supervisors Part Context

This part belongs to the LM809 series of simple reset circuits. It complements other variants offering different threshold voltages and output types within the same family. The device serves as a fundamental building block for power management architectures requiring precise voltage supervision without complex interface protocols.

Supervisors Replacement Considerations

Direct substitutes include LM809M3-4.63 variants with identical electrical characteristics. Cross-reference with LM810 series devices if active-high output is preferred instead of active-low. Verify pinout compatibility and thermal specifications when replacing with generic equivalents.