CAT803STBI-GT3

Supervisors Overview

The CAT803STBI-GT3 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 of 1.2 V to 5.5 V. The device provides a fixed reset delay time of 240 ms and supports threshold voltages of 2.5 V, 3 V, 3.3 V, and 5 V. It draws a typical operating supply current of 15 µA and functions reliably down to VCC = 1.0 V. The component is housed in a SOT-23-3 package and operates over an industrial temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Provides precise monitoring for standard power supply rails including +5.0 V, +3.3 V, +3.0 V, and +2.5 V systems.
• Features an open-drain active-low reset output configuration suitable for wired-OR connections.
• Ensures reset validity down to a minimum supply voltage of 1.0 V.

Supervisors Applications

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

Supervisors Procurement Notes

Verify the specific threshold voltage suffix required for your design, as the base part number covers multiple voltage options (2.5 V, 3 V, 3.3 V, 5 V). Confirm RoHS compliance and lead-free status with the manufacturer or authorized distributor before ordering. Check for any recent lifecycle changes or obsolescence notices directly from onsemi documentation.

Supervisors Selection Notes

Select this component when an open-drain active-low reset signal is required for single-input voltage monitoring. Ensure the chosen threshold voltage matches the target rail within specified tolerance limits. Consider the 240 ms reset delay duration relative to system startup requirements. Verify that the SOT-23-3 package footprint fits the PCB layout constraints.

Supervisors Part Context

This device belongs to the CAT803 family of microprocessor power supply supervisors. It serves as a direct replacement for legacy MAX803 components in industrial temperature applications. The series utilizes floating gate technology to provide accurate threshold detection across varying supply conditions.

Supervisors Replacement Considerations

Direct replacements include the MAX803 for equivalent functionality in industrial temperature ranges. Cross-reference pinouts and electrical characteristics carefully when substituting with other supervisor ICs from different manufacturers.