CAT823TDI-GT3

Supervisors Overview

The CAT823TDI-GT3 is a system supervisory voltage reset circuit manufactured by onsemi. It monitors system voltage and maintains a reset output until the voltage reaches the specified trip value, then holds active for an internal timer of at least 140ms to allow power supply stabilization. Key electrical parameters include a maximum operating voltage of 5.5V, a minimum operating voltage of 1.2V, and a typical quiescent current of 4uA. The device supports threshold voltages of 3V, 3.3V, and 5V, with specific overvoltage and undervoltage thresholds around 3.15V and 3V respectively. It operates within a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Provides automatic microprocessor restart following power failure events
• Includes manual reset capability via pushbutton override
• Features accurate under-voltage monitoring for brownout detection
• Integrates a watchdog timer for system reliability

Supervisors Applications

• Microprocessor and microcontroller based systems
• Portable equipment requiring low power consumption
• Critical microprocessor monitors in industrial control systems
• Intelligent instruments and consumer electronics

Supervisors Procurement Notes

Verify component authenticity through authorized onsemi distributors or certified partners. Confirm RoHS compliance status and material composition declarations prior to integration. Check for End-of-Life (EOL) notices as availability may be limited. Ensure packaging specifications match design requirements for surface mount assembly processes.

Supervisors Selection Notes

Select this component when designing systems requiring precise voltage supervision with minimal quiescent current. The TSOT-23-5 package suits space-constrained portable applications. Verify that the required threshold voltage aligns with the specific system rail being monitored. Consider the 140ms timeout duration against system startup requirements.

Supervisors Part Context

Part of the CAT823/824/825 family of supervisory circuits designed for basic reset and monitoring functions. These devices are pin and function compatible with legacy MAX823/24/25 products, facilitating drop-in replacements in existing designs while offering improved performance characteristics and lower power consumption profiles.

Supervisors Replacement Considerations

Direct functional equivalents include the MAX823 series from Maxim Integrated. Verify pin compatibility and threshold voltage specifications before substitution. Ensure thermal and electrical ratings meet or exceed original design constraints.