CAT859MTBI-GT3

Supervisors Overview

The CAT859MTBI-GT3 is a microprocessor power supply supervisor manufactured by onsemi. It operates within a supply voltage range of 1.2 V to 5.5 V and features a fixed reset threshold voltage of 4.38 V. The device provides an active low, push-pull output with a reset delay time of 240 ms. It is housed in a SOT-23-3 surface-mount package and supports operation across a temperature range of -40°C to +85°C. The component monitors a single input channel without manual reset or watchdog timer functionality.

Supervisors Feature Summary

• Provides hardware-based voltage supervision for microprocessor systems
• Generates a reset signal when monitored voltage falls below the specified threshold
• Features a push-pull output driver for direct interface with digital logic

Supervisors Applications

• Microprocessor power supply monitoring
• Embedded system voltage supervision
• Portable electronic device power management

Supervisors Procurement Notes

Verify that the CAT859MTBI-GT3 remains available for procurement as it may be subject to obsolescence notices from onsemi. Confirm the specific manufacturing lot date code and authenticity through authorized distributors. Ensure the ordering suffix matches the required tape and reel configuration for automated assembly processes.

Supervisors Selection Notes

Select this component when a fixed 4.38 V threshold is required for system reset generation. The SOT-23-3 package offers a compact footprint suitable for space-constrained designs. Consider the 240 ms reset delay duration to ensure compatibility with the target microprocessor's startup requirements and power-on sequence timing constraints.

Supervisors Part Context

This part belongs to the CAT809/CAT859 series of voltage supervisors from onsemi. These devices are designed for reliable power management in consumer and industrial electronics. The series typically includes variants with different threshold voltages and packages to accommodate various system design specifications and voltage rail requirements.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference data directly with onsemi technical support or authorized distributor catalogs before implementing alternative components.