CAT809TSDI-GT3

Supervisors Overview

The CAT809TSDI-GT3 is a single-input voltage supervisory circuit manufactured by onsemi, designed for microprocessor power supply monitoring. It operates within a supply voltage range of 1.2 V to 5.5 V and features an active low push-pull output. The device monitors input voltage against a threshold of 3.08 V with an overvoltage threshold of 3.15 V. It includes a fixed reset delay time of 240 ms and consumes 15 uA of operating current. The component is housed in a SC-70-3 package and supports surface mount installation across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Provides continuous monitoring of a single power rail with active low push-pull output signaling
• Integrates a fixed 240 ms reset delay to ensure stable system initialization
• Operates with low quiescent current consumption suitable for battery-powered applications

Supervisors Applications

• Microprocessor power supply supervision
• Portable electronic device power management
• Battery-operated system voltage monitoring

Supervisors Procurement Notes

Verify component authenticity through authorized distributors as the part is marked obsolete. Confirm package integrity and pin alignment for SC-70-3 compatibility. Check for direct substitutes like MAX809SQ308T1G if availability is critical. Ensure datasheet revisions match design requirements before procurement.

Supervisors Selection Notes

Select this component when a single-channel supervisor with active low output is required. Verify that the 3.08 V threshold aligns with the monitored rail's minimum operating voltage. Consider the 240 ms delay duration relative to system startup timing requirements. Ensure the SC-70-3 package fits the PCB layout constraints.

Supervisors Part Context

This part belongs to the CAT809 series of microprocessor power supply supervisors from onsemi. It shares functional similarities with other variants in the family but differs in threshold voltage and package type. The series is designed for reliable voltage monitoring in embedded systems requiring compact solutions.

Supervisors Replacement Considerations

MAX809SQ308T1G is listed as a direct substitute. Verify pinout compatibility and electrical specifications before substitution.