MAX803ZEXR-T

Supervisors Overview

The MAX803ZEXR-T is a microprocessor supervisory circuit designed to monitor power supplies in digital systems. It provides a reset signal when the monitored voltage falls below a specific threshold. The device features an open-drain active-low RESET output and operates within a supply voltage range up to 5.5 V. It includes a fixed timeout period of 240 ms for the reset pulse. The component is housed in a SC-70-3 package and supports surface-mount installation. It functions without manual reset or watchdog timer capabilities.

Supervisors Feature Summary

• Monitors single input voltage with precision threshold detection
• Provides active-low open-drain reset output signal
• Ensures valid reset operation down to low supply voltages
• Eliminates need for external components during implementation

Supervisors Applications

• Microprocessor system supervision
• Digital system power monitoring
• Portable battery-powered equipment
• Automotive electronic control units

Supervisors Procurement Notes

Verify the exact suffix configuration against official Analog Devices documentation, as variations exist within the MAX803 family. Confirm RoHS compliance status through current manufacturer certificates. Check availability status directly with authorized distributors, as supply conditions may vary by region. Ensure the ordering part number matches the required threshold voltage and package type specified in your design requirements.

Supervisors Selection Notes

Select this component when a simple, cost-effective voltage supervisor is required for systems powered by standard logic levels. The open-drain output allows flexibility in interfacing with various logic families. Consider the 240 ms timeout duration to ensure compatibility with the target processor's startup sequence. Verify that the SC-70-3 package fits the available board space constraints.

Supervisors Part Context

This part belongs to the MAX803/MAX809/MAX810 family of microprocessor reset circuits manufactured by Maxim Integrated, now part of Analog Devices. These devices are designed to replace discrete monitoring solutions by integrating threshold detection and timing functions into a small three-pin package. The family offers different output configurations to suit various system architectures.

Supervisors Replacement Considerations

Direct substitutes include other variants from the MAX803 series with matching thresholds. Cross-reference with LM809 equivalents if pin compatibility is critical. Verify that any replacement maintains the same open-drain output structure and timeout characteristics.