CAT803LTBI-GT3

Supervisors Overview

The CAT803LTBI-GT3 is a microprocessor power supply supervisor manufactured by onsemi. It monitors system voltage and asserts an active-low reset signal when the supply drops below a specific threshold. The device features an open-drain output configuration and lacks manual reset or watchdog timer capabilities. It operates within an industrial temperature range of -40°C to +85°C and supports multiple threshold voltages including 2.5 V, 3 V, 3.3 V, and 5 V. The component is housed in a compact SOT-23-3 surface-mount package.

Supervisors Feature Summary

• Provides precise monitoring for standard digital power supply rails
• Generates active-low reset signal with open-drain output
• Ensures reset validity down to low voltage levels
• Immune to power supply transients during startup

Supervisors Applications

• Computers and server systems
• Wireless communications equipment
• Embedded control systems
• Intelligent instruments and handheld devices

Supervisors Procurement Notes

Verify the exact threshold voltage variant required, as the base part number covers multiple options. Confirm RoHS compliance and lead-free status with the supplier. Check current availability status as distribution may vary. Ensure the SOT-23-3 package fits the PCB layout constraints. Validate that the open-drain output interface matches the target microprocessor reset input requirements.

Supervisors Selection Notes

Select this component when an active-low reset with open-drain output is required. Choose based on the specific system voltage needing supervision among the available thresholds. Consider the SOT-23-3 package size for space-constrained designs. Verify that the absence of a manual reset pin does not conflict with system design needs. Ensure the operating temperature range meets the application environment specifications.

Supervisors Part Context

This part belongs to the CAT803 series of supervisory circuits from onsemi. It serves as a direct replacement for legacy MAX803 components in industrial applications. The series includes variants with different output configurations such as push-pull outputs. These devices are designed for reliable power management in digital systems requiring stable reset timing.

Supervisors Replacement Considerations

The CAT803LTBI-GT3 is documented as a direct replacement for the MAX803 in industrial temperature range applications. Verify pinout compatibility and electrical characteristics before substitution. Ensure the replacement maintains the same active-low open-drain output behavior.