CAT803LSDI-GT3

Supervisors Overview

The CAT803LSDI-GT3 is a voltage supervisory circuit manufactured by onsemi, designed for monitoring single-input power supply voltages. 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 and includes overvoltage detection with a threshold of 4.7 V. Available in a compact SC-70-3 surface-mount package, it supports threshold voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The component functions without manual reset or watchdog timer capabilities, drawing a typical operating current of 20 uA across an industrial temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Provides hardware-based supervision of a single monitored input voltage level
• Generates an active low signal via an open-drain output interface
• Detects overvoltage conditions independently of the main reset function

Supervisors Applications

• Monitoring microprocessor power rails during system startup
• Ensuring stable voltage levels in embedded control systems
• Protecting logic circuits from undervoltage events

Supervisors Procurement Notes

Verify component authenticity through authorized distribution channels due to end-of-life status. Confirm package integrity and pin alignment against SC-70-3 specifications. Validate electrical parameters against original datasheet requirements before integration into final designs.

Supervisors Selection Notes

Select this component when a simple, low-power supervisor is required for single-voltage monitoring. Consider the fixed 240 ms delay and lack of manual reset functionality against specific timing requirements. Evaluate the open-drain output compatibility with downstream logic levels.

Supervisors Part Context

This part belongs to the CAT803 series of voltage supervisors from onsemi. The series offers various threshold options and packages to suit different power management needs. The CAT803LSDI-GT3 specifically utilizes the SC-70-3 footprint for space-constrained applications.

Supervisors Replacement Considerations

Check for direct pin-compatible alternatives within the same family or cross-reference with similar open-drain supervisors. Verify that substitute parts match the 240 ms delay and 4.7 V overvoltage threshold if those parameters are critical.