CAT803ZTBI-GT3

Supervisors Overview

The CAT803ZTBI-GT3 is a single-channel voltage supervisor IC from onsemi, designed for monitoring power supplies in digital systems. It operates within a supply voltage range of 1.2 V to 5.5 V and provides reset signals valid down to VCC = 1.0 V. The device features an active low open-drain output with a fixed threshold voltage of 2.5 V, 3 V, 3.3 V, or 5 V depending on the specific variant configuration. It includes a reset delay time of 240 ms and functions over an industrial temperature range of -40°C to +85°C. The component is housed in a SOT-23-3 package.

Supervisors Feature Summary

• Provides precision monitoring for standard power supply voltages including +5.0 V, +3.3 V, +3.0 V, and +2.5 V levels.
• Delivers an active low open-drain reset signal that remains valid even at very low supply voltages.
• Offers direct replacement capability for legacy MAX803 devices in industrial temperature applications.

Supervisors Applications

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

Supervisors Procurement Notes

Verify current availability status as this component may be subject to end-of-life restrictions or limited distribution channels. Confirm exact threshold voltage variants (2.5V, 3V, 3.3V, or 5V) required for your specific design, as these are distinct part numbers within the same family. Ensure compatibility with existing PCB footprints for SOT-23-3 packages during procurement planning.

Supervisors Selection Notes

Select this component when a simple, low-cost supervisor is needed for single-rail monitoring. Choose based on the specific voltage threshold required by the target system rail. Consider the open-drain output type if wired-OR logic is necessary. Verify that the 240 ms reset delay meets the timing requirements of the downstream microprocessor or logic circuitry.

Supervisors Part Context

This part belongs to the CAT803 series of microprocessor power supply supervisors manufactured by onsemi. It serves as a functional equivalent to the Maxim Integrated MAX803, maintaining pinout and electrical characteristics for easy migration. The series is categorized under PMIC supervisory circuits, focusing on basic power-on reset functionality without additional features like watchdog timers or manual resets.

Supervisors Replacement Considerations

The CAT803ZTBI-GT3 is documented as a direct replacement for the MAX803 in industrial temperature range applications. Designers migrating from older designs should verify that the open-drain output configuration matches their existing pull-up resistor networks.