LM809M3X-2.93

Supervisors Overview

The LM809M3X-2.93/NOPB is a 3-pin microprocessor supervisory circuit manufactured by Texas Instruments, designed to monitor a single voltage input within a supply range of up to 5.5 V. It features an active-low, push-pull output and provides a fixed reset delay time of 840 ms. The device operates reliably across an extended temperature range from -40°C to +105°C and is housed in a compact SOT-23-3 surface-mount package.

Supervisors Feature Summary

• Provides automatic system reset when monitored voltage drops below the specified threshold
• Features active-low push-pull output for direct interface with digital logic
• Includes internal reset delay timer to ensure stable power-up conditions

Supervisors Applications

• Microprocessor power supply monitoring
• Battery-powered system supervision
• Embedded controller reset generation

Supervisors Procurement Notes

Verify the exact suffix against official Texas Instruments documentation, as 'LM809M3X-2.93' may represent a specific tape-and-reel variant or legacy designation. Confirm RoHS compliance status and current production lifecycle stage (NRND or Active) via the manufacturer's official datasheet before procurement to ensure availability and functional equivalence.

Supervisors Selection Notes

Select this component when a fixed 2.93 V threshold is required for single-input voltage supervision. Ensure the application demands an active-low output and can accommodate the 840 ms reset delay. Verify that the operating environment stays within the -40°C to +105°C range and that the SOT-23-3 package fits the PCB layout constraints.

Supervisors Part Context

This part belongs to the LM809/LM810 family of 3-pin microprocessor reset circuits from Texas Instruments. These devices are engineered for reliable voltage monitoring in embedded systems, offering various threshold options to suit different rail voltages while maintaining a consistent pinout and functional behavior across the series.

Supervisors Replacement Considerations

Official alternate part numbers include LM809M3-2.93/NOPB. Verify pin compatibility and electrical specifications with the manufacturer's datasheet before substitution.