CAT809STBI-T3

Supervisors Overview

The CAT809STBI-T3 is a voltage supervisory circuit manufactured by onsemi, designed to monitor power supply voltages in digital systems. It features an active low, push-pull output and operates within a supply voltage range of 1.2 V to 5.5 V. The device provides a reset delay time of 240 ms and has a typical operating supply current of 6 uA. It is available with threshold voltages of 2.5 V, 3 V, 3.3 V, or 5 V. The component is housed in a SOT-23-3 package and supports surface mount installation.

Supervisors Feature Summary

• Provides active low push-pull reset signal generation
• Monitors single power supply input voltage
• Operates without manual reset or watchdog timer functions

Supervisors Applications

• Digital system power supply monitoring
• Microprocessor power management circuits
• Portable electronic devices requiring low standby current

Supervisors Procurement Notes

Verify the specific threshold voltage variant required, as the suffix indicates a specific value among 2.5 V, 3 V, 3.3 V, or 5 V options. Confirm package compatibility with SOT-23-3 footprints. Check for end-of-life status or obsolescence notices from onsemi before finalizing design-in decisions.

Supervisors Selection Notes

Select this component when a simple, low-power supervisor is needed for single-rail monitoring. Ensure the chosen threshold matches the target rail voltage. Consider the 240 ms reset delay for system timing requirements. Verify that the active low output polarity aligns with the downstream logic interface needs.

Supervisors Part Context

This part belongs to the CAT809 series of voltage supervisors from onsemi. These devices are engineered to replace older industry-standard parts like the MAX809. The series offers various threshold options to support common system voltages such as +5.0 V, +3.3 V, +3.0 V, and +2.5 V.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers for CAT809STBI-T3 were not found in the provided source material.