CAT810RTBI-GT3

Supervisors Overview

The CAT810RTBI-GT3 is a single-channel voltage supervisory circuit manufactured by onsemi, designed to monitor power supplies in digital systems. It operates within a supply voltage range of 1.2 V to 5.5 V and features an active-high, push-pull reset output. The device provides a fixed threshold voltage of 2.63 V with a corresponding over-voltage threshold of 2.66 V. It includes a reset delay time of 240 ms and consumes a typical operating supply current of 15 µA. Packaged in a SOT-23-3 surface-mount case, it functions reliably across an industrial temperature range from -40 °C to +85 °C.

Supervisors Feature Summary

• Generates a reset signal when the monitored power supply voltage drops below a preset threshold level
• Features an active-high, push-pull output configuration for direct interface compatibility
• Ignores fast transients on the power supply line to prevent false triggering

Supervisors Applications

• Monitoring power supplies in industrial digital systems
• Providing reset signals for microprocessors and logic circuits
• Serving as a direct replacement for legacy MAX809 devices in existing designs

Supervisors Procurement Notes

Verify the specific suffix RTBI to confirm the 2.63 V threshold voltage and active-high output configuration. Confirm the SOT-23-3 package type matches the design footprint requirements. Ensure the industrial temperature rating aligns with the operational environment specifications. Cross-reference the manufacturer part number against official catalogs to avoid obsolete or discontinued variants.

Supervisors Selection Notes

Select this component when an active-high reset output is required for low-voltage digital systems. The 2.63 V threshold is suitable for monitoring 3.3 V or 5.0 V rails where precise under-voltage detection is necessary. The low quiescent current makes it appropriate for battery-powered applications requiring minimal standby drain. Verify that the push-pull output capability meets the drive requirements of the downstream logic inputs.

Supervisors Part Context

This device belongs to the CAT809/CAT810 family of 3-pin microprocessor power supply supervisors. While the CAT809 series offers active-low outputs, the CAT810 variant specifically provides active-high outputs. These components are engineered to replace older industry-standard parts like the MAX809, offering improved reliability and lower power consumption within a compact three-terminal surface-mount package.

Supervisors Replacement Considerations

The CAT810RTBI-GT3 is documented as a direct functional replacement for the Maxim Integrated MAX809CSA+ and similar MAX809 variants featuring active-high outputs. When substituting, ensure the original design accommodates the active-high logic polarity, as many legacy MAX809 implementations utilize active-low outputs.