CAT803MSDI-GT3

Supervisors Overview

The CAT803MSDI-GT3 is a voltage supervisory circuit manufactured by onsemi, designed for monitoring single-channel power supply voltages. It operates within a maximum supply voltage of 5.5 V and features an active low, open-drain output type. The device provides a fixed reset delay time of 240 ms to ensure stable system initialization. It is available in an SC-70-3 surface-mount package and supports threshold voltages including 2.5 V, 3 V, 3.3 V, and 5 V variants. The component functions without manual reset or watchdog timer capabilities.

Supervisors Feature Summary

• Provides active low open-drain output signaling for voltage supervision
• Features a fixed 240 ms reset delay for reliable system startup
• Supports multiple fixed threshold voltage options for various logic levels

Supervisors Applications

• Portable equipment power management
• Microprocessor system reset circuits
• Battery-powered device supervision

Supervisors Procurement Notes

Verify the specific suffix code to confirm the exact threshold voltage selection, as the base part number covers multiple voltage variants. Confirm package orientation and pinout compatibility with existing PCB footprints. Check current lifecycle status as distribution availability may vary across regions. Ensure operating temperature range meets environmental requirements for the intended application.

Supervisors Selection Notes

Select this component when a simple, low-pin-count voltage supervisor is required for single-rail monitoring. Consider the fixed reset delay and lack of manual reset functionality against system timing requirements. Evaluate the SC-70-3 package size constraints against available board space. Compare quiescent current consumption if battery life is a critical design parameter.

Supervisors Part Context

This component belongs to the CAT803 series of voltage supervisors from onsemi. The series offers compact solutions for power management applications requiring basic reset generation. The SDI suffix indicates the SC-70-3 package style. The GT3 designation typically refers to the tape and reel packaging format used for automated assembly processes.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence with other single-channel voltage supervisors offering similar threshold options and package dimensions before substitution.