LM809M3X-4.63

Supervisors Overview

The LM809M3X-4.63/NOPB is a 3-pin microprocessor reset circuit manufactured by Texas Instruments, designed for supply voltage monitoring in electronic systems. It operates within a maximum supply voltage of 5.5 V and features an active-low, push-pull output type. The device monitors a single input with a threshold voltage of 4.63 V. It provides a reset delay time of 840 ms to ensure stable system recovery. The component supports surface mount installation in an SOT-23-3 package and functions reliably across a temperature range from -40°C to +105°C.

Supervisors Feature Summary

• Provides active-low, push-pull reset signals for reliable microprocessor supervision
• Monitors a single power supply input with precise threshold detection
• Operates without manual reset or watchdog timer functionality
• Supports surface-mount assembly in compact SOT-23-3 packages

Supervisors Applications

• Microprocessor reset circuits
• Supply voltage monitoring
• Battery-powered devices

Supervisors Procurement Notes

Verify the exact suffix against official Texas Instruments documentation, as 'LM809M3X-4.63' may represent a specific tape-and-reel variant or distributor-specific designation distinct from the standard 'LM809M3-4.63/NOPB'. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the ordering part number matches the required package and electrical specifications for your design.

Supervisors Selection Notes

Select this component when an active-low reset signal is required for single-supply monitoring applications. The 4.63 V threshold suits systems operating near standard logic levels. Consider the 840 ms reset delay for timing requirements. Verify that the SOT-23-3 package fits the PCB layout constraints and that the -40°C to +105°C temperature range meets environmental conditions.

Supervisors Part Context

The LM809 series belongs to Texas Instruments' family of 3-pin microprocessor reset circuits. These devices are engineered for simple, cost-effective voltage supervision. The LM809 specifically offers an active-low output, contrasting with the LM810 which provides an active-high output. Both share similar electrical characteristics and packaging options, serving as foundational components for power management in embedded systems.

Supervisors Replacement Considerations

The LM809M3-2.93/NOPB is documented as an alternate for related variants. For direct functional replacement with identical active-low output and similar form factor, consider other LM809 variants with different threshold voltages (e.g., LM809M3-2.63/NOPB, LM809M3-4.38/NOPB). Verify pinout compatibility and threshold voltage alignment before substitution.