CAT853STBI-T3

Supervisors Overview

The CAT853STBI-T3 is a voltage supervisory circuit manufactured by onsemi, designed for monitoring single-input power rails. It operates within a supply voltage range of 1.2 V to 5.5 V and features an open-drain output type. The device provides a reset delay time of 20 µs and has a threshold voltage of 2.4 V. It is housed in a SOT-23-3 package with a maximum power dissipation of 320 mW. The component supports surface mount installation and functions across a temperature range of -40 °C to +85 °C. It draws a working supply current of 6 µA and lacks manual reset or watchdog timer capabilities.

Supervisors Feature Summary

• Provides voltage supervision with an open-drain active-low output for system reset signaling
• Operates over a wide input voltage range from 1.2 V to 5.5 V
• Features a fast reset delay time of 20 µs for rapid response to undervoltage events

Supervisors Applications

• Monitoring power supplies in embedded systems
• Voltage supervision for microcontroller units (MCUs)
• Reset generation in portable electronic devices

Supervisors Procurement Notes

Verify the obsolete status of this component before design finalization, as it may no longer be in active production. Confirm availability through authorized distributors or secondary market suppliers if sourcing is required. Ensure that the SOT-23-3 package footprint matches your PCB layout constraints. Check for RoHS compliance documentation if environmental regulations apply to your specific application region. Consider lead times carefully due to potential discontinuation.

Supervisors Selection Notes

Select this component when a low-power, single-channel voltage supervisor with a fast 20 µs reset delay is required. It is suitable for applications operating between 1.2 V and 5.5 V where an open-drain output interface is preferred. The low quiescent current of 6 µA makes it appropriate for battery-powered designs. Ensure the 2.4 V threshold aligns with the monitored rail's minimum operating voltage requirements.

Supervisors Part Context

This part belongs to the CAT853 series of supervisory circuits from onsemi. The series includes variants with different threshold voltages and reset delays. The CAT853STBI-T3 specifically denotes the SOT-23-3 package variant with a 2.4 V threshold. It is categorized under PMIC - Power Management ICs and serves as a fundamental building block for power management reliability in digital systems.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.