LM809M3X-3.08

Supervisors Overview

The LM809M3X-3.08/NOPB is a 3-pin microprocessor reset circuit manufactured by Texas Instruments, designed for voltage supervisory applications. It features an active-low, push-pull output and monitors a single input channel with a fixed threshold voltage of 3.08 V. The device operates within a supply voltage range up to 5.5 V and provides a reset delay time of 240 ms. It supports surface-mount installation in a SOT-23-3 package and functions reliably across an extended temperature range from -40°C to +105°C.

Supervisors Feature Summary

• Provides active-low, push-pull reset signaling for monitored power rails
• Fixed threshold voltage detection eliminates need for external resistor networks
• Compact 3-pin SOT-23 surface-mount packaging for space-constrained designs

Supervisors Applications

• Microprocessor power supply monitoring
• Voltage supervision in embedded systems
• Reset generation for digital logic circuits

Supervisors Procurement Notes

Verify the exact suffix against official Texas Instruments documentation, as 'M3X' may indicate specific tape-and-reel or marking variations compared to standard 'M3' designations. Confirm RoHS compliance status via the current datasheet. Ensure the threshold voltage matches the required 3.08 V specification for your application. Check for any obsolete or NRND status updates before finalizing procurement plans.

Supervisors Selection Notes

Select this component when an active-low reset signal is required for voltages near 3.08 V. Compare reset delay times with other LM809 variants if timing constraints are critical. Ensure the operating temperature range meets environmental requirements. Verify that the push-pull output capability suits the load driving needs of the downstream circuitry without additional buffering.

Supervisors Part Context

This part belongs to the LM809/LM810 family of 3-pin microprocessor reset circuits. The LM809 variant specifically provides an active-low output, whereas the LM810 offers an active-high output. Both share similar electrical characteristics but differ in output polarity, allowing designers to choose based on the logic requirements of the target system architecture.

Supervisors Replacement Considerations

LM809M3-3.08/NOPB is a confirmed equivalent part number within the same product family.