CAT823MTDI-GT3

Supervisors Overview

The CAT823MTDI-GT3 is a system supervisory voltage reset circuit manufactured by onsemi, designed to monitor electronic system voltages and maintain a reset output until the supply reaches specified trip values. It features an internal timer with a minimum duration of 140ms to allow power supply stabilization. The device supports manual reset inputs for external override and automatically restarts microprocessors after power failures. It operates within a supply voltage range of 1.2V to 5.5V, with working supply current of 4µA. Threshold voltages include 3V, 3.3V, and 5V, with overvoltage threshold at 3.15V and undervoltage threshold at 3V. Power dissipation is rated at 571mW. The component is housed in a TSOT-23-5 package and functions across temperatures from -40°C to +85°C.

Supervisors Feature Summary

• Provides accurate under-voltage system monitoring and brownout detection for 3.0V, 3.3V, and 5.0V systems
• Includes a watchdog timer and manual reset capability for external override functionality
• Automatically restarts microprocessor systems following power failure events

Supervisors Applications

• Microprocessor and microcontroller based systems
• Intelligent instruments and control systems
• Critical microprocessor monitors in portable equipment

Supervisors Procurement Notes

Verify the specific suffix GT3 against official onsemi documentation to confirm tape and reel packaging specifications. Ensure the part number matches the exact pinout and electrical characteristics required for the target design. Cross-reference the datasheet revision date to confirm compliance with current manufacturing standards. Confirm availability status as end-of-life information may impact long-term supply chain stability.

Supervisors Selection Notes

Select this component when a low-current supervisory circuit with manual reset and watchdog features is required. The TSOT-23-5 package suits space-constrained designs. Verify that the fixed threshold voltage options (3V, 3.3V, 5V) align with the system's operating voltage. Consider the 140ms minimum timer delay for application timing requirements. Ensure the operating temperature range meets the environmental conditions of the final product.

Supervisors Part Context

The CAT823 series belongs to onsemi's line of system supervisory circuits, offering basic reset and monitoring functions. It is pin and function compatible with MAX823/24/25 products, facilitating direct replacements in existing designs. The series includes variants with different threshold voltages and packages, providing flexibility for various voltage monitoring applications in consumer and industrial electronics.

Supervisors Replacement Considerations

The CAT823MTDI-GT3 is pin and function compatible with MAX823, MAX824, and MAX825 products. Designers can consider these Maxim Integrated (now Analog Devices) parts as potential substitutes if sourcing constraints exist, provided the electrical parameters and package dimensions are verified against the specific application requirements.