CAT823TTDI-GT3

Supervisors Overview

The CAT823TTDI-GT3 is a system supervisory voltage reset circuit manufactured by onsemi. It operates within a supply voltage range of 1.2 V to 5.5 V and features a fixed under-voltage threshold of 3 V with an over-voltage threshold of 3.15 V. The device provides active low, push-pull output and includes manual reset functionality alongside a watchdog timer. It is housed in a TSOT-23-5 surface-mount package and supports operation from -40 °C to +85 °C.

Supervisors Feature Summary

• Integrates voltage supervision with manual reset capability for comprehensive system monitoring
• Includes built-in watchdog timer to detect software or hardware malfunctions
• Delivers active low push-pull output signal for direct interface with digital logic

Supervisors Applications

• Portable battery-powered equipment requiring low quiescent current
• Embedded systems needing reliable power-on reset sequences
• Industrial control units operating in extended temperature environments

Supervisors Procurement Notes

Verify component authenticity through authorized distribution channels due to end-of-life status. Confirm RoHS compliance documentation matches the specific manufacturing lot. Validate that the TSOT-23-5 package variant aligns with PCB footprint requirements. Ensure design-in approval accounts for the discontinued lifecycle stage before finalizing procurement plans.

Supervisors Selection Notes

Select this component when a single-channel supervisor with integrated watchdog is required. The fixed 3 V threshold suits 3.3 V logic systems. Consider the low 4 uA operating current for energy-sensitive designs. Verify that the manual reset pin meets system safety requirements. Evaluate the push-pull output drive strength against load specifications.

Supervisors Part Context

This part belongs to the CAT823 series of supervisory circuits designed for general-purpose voltage monitoring. It complements other PMIC offerings by providing dedicated reset generation without complex configuration. The series targets applications where reliability and simplicity are prioritized over programmability.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the end-of-life status, alternative sourcing requires careful evaluation of functional equivalence and package compatibility.