CAT803TTBI-T3

Supervisors Overview

The CAT803TTBI-T3 is a voltage supervisory circuit from onsemi, designed to monitor power supplies in digital systems. It features an open-drain active-low reset output and operates within a supply voltage range up to 5.5 V. The device provides a fixed reset delay time of 240 ms and supports threshold voltages including 2.5 V, 3 V, 3.3 V, and 5 V. It functions reliably across an industrial temperature range of -40°C to +85°C and is housed in a compact SOT-23-3 surface-mount package.

Supervisors Feature Summary

• Provides precise monitoring of standard power supply rails such as 5.0 V, 3.3 V, 3.0 V, and 2.5 V.
• Features an open-drain active-low reset output configuration for direct interface with microprocessors.
• Ensures system stability with a fixed 240 ms reset delay time during power-up or brown-out events.

Supervisors Applications

• Computers and servers
• Wireless communications equipment
• Embedded control systems

Supervisors Procurement Notes

Verify component authenticity through authorized distributors due to obsolete status. Confirm RoHS compliance and lead-free packaging specifications against current manufacturing data sheets. Validate pinout compatibility with existing SOT-23-3 footprints before integration into new designs.

Supervisors Selection Notes

Select this component when an open-drain active-low reset signal is required for single-channel voltage supervision. Ensure the monitored rail matches available threshold options. Consider the 240 ms delay requirement against system startup timing constraints. Verify that the SOT-23-3 package fits the board space limitations.

Supervisors Part Context

This part belongs to the CAT803 series of microprocessor power supply supervisors. It serves as a direct replacement for legacy MAX803 devices in industrial temperature applications. The series offers various threshold voltages and output configurations to support diverse digital system power management needs.

Supervisors Replacement Considerations

CAT803TTBI-GT3 is a verified substitute within the same family offering identical electrical characteristics and pinout compatibility.