CAT803ZSDI-GT3

Supervisors Overview

The CAT803ZSDI-GT3 is a voltage supervisory circuit manufactured by onsemi, designed for monitoring single-input power rails. It operates within a maximum supply voltage of 5.5 V and features an active low, open-drain output. The device provides a fixed reset delay time of 240 ms to ensure stable system initialization. It supports threshold voltages including 2.5 V, 3 V, 3.3 V, and 5 V, with the specific Z suffix indicating a 2.32 V threshold variant. The component functions without manual reset, watchdog timer, or battery backup switch capabilities. It is housed in a compact SC-70-3 surface-mount package and operates across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Provides reliable power supervision with an active low open-drain output interface for direct microcontroller integration.
• Ensures system stability through a fixed 240 ms reset delay time during power-up sequences.
• Operates efficiently with low quiescent current consumption suitable for battery-powered applications.

Supervisors Applications

• Monitoring power rails in embedded systems requiring simple reset generation
• Protecting microcontrollers and digital logic from undervoltage conditions
• Ensuring proper initialization sequences in portable electronic devices

Supervisors Procurement Notes

Verify the exact threshold voltage corresponding to the 'Z' suffix against the official datasheet, as suffixes define specific trip points. Confirm the SC-70-3 package dimensions match your PCB footprint requirements. Check for end-of-life status or obsolescence notices from onsemi before finalizing procurement plans. Ensure compatibility with your system's operating temperature range of -40°C to +85°C. Validate that the open-drain output configuration aligns with your pull-up resistor strategy.

Supervisors Selection Notes

Select this component when a fixed 240 ms reset delay and open-drain output are required for single-channel voltage monitoring. The SC-70-3 package offers space efficiency for compact designs. Consider the specific 2.32 V threshold if it matches your target rail voltage. This part lacks advanced features like watchdog timers, making it suitable for basic supervision tasks only. Verify that the 5.5 V maximum input rating exceeds your highest expected supply voltage.

Supervisors Part Context

The CAT803 series represents onsemi's line of simple voltage supervisors. These devices focus on fundamental power management tasks without complex programmability. The CAT803ZSDI-GT3 is a specific variant within this family, distinguished by its threshold voltage and packaging. It belongs to the broader category of PMIC supervisory circuits used for system reliability.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers include MAX6328XR29+T from Analog Devices/Maxim Integrated. Verify pinout compatibility and electrical specifications before substitution.