CAT811ZTBI-T3

Supervisors Overview

The CAT811ZTBI-T3 is a microprocessor power supply supervisory circuit manufactured by onsemi, housed in a compact SOT-143-4 surface-mount package. It monitors a single voltage input and provides an active-low push-pull reset output. The device features a manual reset input and operates within an industrial temperature range of -40°C to +85°C. It supports standard threshold voltages including 2.5V, 3.0V, 3.3V, and 5.0V. The component ensures correct output states at Vcc levels as low as 1.0V and ignores fast transients.

Supervisors Feature Summary

• Generates a reset signal asserted when the monitored power supply voltage falls below a preset threshold level.
• Includes a manual reset input for external control of the reset state.
• Features a push-pull output structure that remains in the correct state at supply voltages as low as 1.0V.
• Designed to ignore fast transients on the power supply line.

Supervisors Applications

• Monitoring +5.0 V power supplies
• Monitoring +3.3 V power supplies
• Monitoring +3.0 V power supplies
• Monitoring +2.5 V power supplies

Supervisors Procurement Notes

Verify the specific datasheet version for the CAT811ZTBI-T3, as this part number originates from Catalyst Semiconductor, which was acquired by onsemi. Confirm that the electrical characteristics and pinout match your design requirements, particularly regarding the manual reset functionality and threshold voltage accuracy. Ensure the SOT-143-4 package dimensions are compatible with your PCB layout constraints.

Supervisors Selection Notes

Select this component for applications requiring a simple, low-cost supervisor with manual reset capability. It serves as a direct replacement for legacy MAX811 devices in industrial environments. Consider the available threshold options (2.5V, 3.0V, 3.3V, 5.0V) to ensure compatibility with the target system voltage. The SOT-143-4 package is suitable for space-constrained designs.

Supervisors Part Context

The CAT811 series belongs to a family of microprocessor supervisory circuits originally developed by Catalyst Semiconductor. These devices are designed to monitor power supply voltages and generate reset signals for digital systems. The series includes variants like the CAT812, which offers an active-high output. The technology utilizes floating gate mechanisms to provide precise threshold detection.

Supervisors Replacement Considerations

The CAT811ZTBI-T3 is documented as a direct replacement for the MAX811REUS+T in applications operating over the industrial temperature range. Verify pin compatibility and electrical specifications before substitution.