CAT859FTBI-GT3

Supervisors Overview

The CAT859FTBI-GT3 is a voltage supervisory circuit manufactured by onsemi, designed to monitor a single power supply rail. It features a fixed threshold voltage of 4.2V and provides an active-low push-pull output signal. The device is housed in a compact SOT-23-3 surface-mount package, suitable for space-constrained applications. It operates within a specified temperature range and includes a reset delay time of 240 ms to ensure stable system initialization. This component functions as a simple reset or power-on reset IC without manual reset or watchdog timer capabilities.

Supervisors Feature Summary

• Monitors a single voltage input with a fixed threshold
• Provides an active-low push-pull output signal
• Housed in a compact SOT-23-3 surface-mount package

Supervisors Applications

• Power-on reset circuits
• Manual reset circuits
• Battery-powered systems

Supervisors Procurement Notes

Verify the specific suffix 'GT3' against the manufacturer's current datasheet to confirm packaging details and compliance status. Check for end-of-life notices or obsolescence warnings, as availability may be limited through primary distributors. Ensure the 4.2V threshold matches the target application's requirements before finalizing procurement decisions.

Supervisors Selection Notes

Select this component when a fixed 4.2V monitoring threshold is required for a single-supply system. The SOT-23-3 package is ideal for designs with limited board space. Consider the 240 ms reset delay to ensure adequate stabilization time for downstream logic. Verify that the active-low push-pull output interface is compatible with the receiving microcontroller or FPGA inputs.

Supervisors Part Context

This part belongs to the CAT859 series of voltage supervisors from onsemi. These devices are engineered for reliable power management in portable and industrial electronics. The series typically offers various threshold voltages and package options to accommodate different design constraints while maintaining low quiescent current consumption.

Supervisors Replacement Considerations

Direct substitutes include other CAT859 variants with different threshold voltages if the 4.2V requirement can be adjusted. Cross-reference with similar SOT-23-3 voltage supervisors from other manufacturers, ensuring pinout compatibility and matching electrical specifications such as reset delay and output type.