LM809M3X-3.08/NOPB

Supervisors Overview

The LM809M3X-3.08/NOPB is a voltage supervisory circuit manufactured by Texas Instruments, designed to monitor a single power supply input. It operates within a supply voltage range of up to 5.5 V and provides an active-low, push-pull output signal. The device features a fixed threshold voltage of 3.08 V and includes a reset delay time of 240 ms. It is housed in a SOT-23-3 surface-mount package and supports an operating temperature range from -40°C to +105°C.

Supervisors Feature Summary

• Provides active-low, push-pull output for reliable logic interfacing
• Includes a built-in reset delay timer to ensure stable system initialization
• Operates across an extended industrial temperature range

Supervisors Applications

• Microprocessor reset circuits
• Portable equipment power monitoring
• Battery-powered system supervision

Supervisors Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free compliance and RoHS adherence as per manufacturer specifications. Confirm the 'M3X' designation corresponds to the correct SOT-23-3 tape and reel packaging format required for automated assembly processes. Ensure the 3.08 V threshold matches the target rail voltage requirements.

Supervisors Selection Notes

Select this component when a fixed 3.08 V threshold is required for single-channel monitoring. Consider the 240 ms reset delay duration against system startup timing constraints. Evaluate the SOT-23-3 footprint availability against board space limitations compared to alternative packages like SC-70 or SOIC variants.

Supervisors Part Context

This part belongs to the LM809 family of voltage supervisors, which offers various fixed threshold options. The LM809 series is characterized by low quiescent current and compact packaging, making it suitable for space-constrained portable applications where continuous power monitoring is essential without significant battery drain.

Supervisors Replacement Considerations

The LM809M3-2.93/NOPB is documented as an alternate option within the same family, offering a different threshold voltage. Verify that the change in trip point does not affect the monitored rail's stability requirements before substitution.