ADM805LARN

Supervisors Overview

The ADM805LARN is a microprocessor supervisory circuit manufactured by Analog Devices Inc. It monitors a single voltage input with a threshold of 4.65 V and an overvoltage threshold of 4.75 V. The device provides an active high reset signal with a typical delay of 200 ms. It operates within a supply voltage range of 4.5 V to 5.5 V and consumes 100 uA of working current. The component includes a watchdog timer and battery backup switch functionality. It is housed in an 8-SOIC package and functions reliably between -40°C and +85°C.

Supervisors Feature Summary

• Integrates precision voltage monitoring with power fail warning capabilities for system protection.
• Includes a built-in watchdog timer to detect software malfunctions and ensure system recovery.
• Supports seamless battery backup switchover to maintain data integrity during primary power loss.

Supervisors Applications

• Microprocessor system supervision
• Battery backup power management
• Industrial control systems

Supervisors Procurement Notes

Verify the specific suffix 'LARN' against official documentation, as availability may vary. Confirm RoHS compliance status directly with the manufacturer or authorized distributors. Check for obsolescence notices, as this component family may have end-of-life implications. Ensure the 8-SOIC package dimensions match your PCB footprint requirements before finalizing procurement decisions.

Supervisors Selection Notes

Select this component when a fixed 4.65 V threshold is required for CMOS logic systems. The active high output is suitable for interfaces requiring positive logic reset signals. Consider the low operating current for battery-powered applications where standby consumption is critical. Verify that the 200 ms reset delay aligns with the target processor's startup timing requirements.

Supervisors Part Context

This part belongs to the ADM805 series of supervisory circuits designed for low-power applications. It is functionally similar to other variants like the ADM805LARNZ but may differ in packaging or environmental specifications. The series is characterized by its integration of voltage monitoring, watchdog, and battery backup features in a compact form factor.

Supervisors Replacement Considerations

The ADM805LARNZ is a documented variant within the same product line. Verify pin compatibility and electrical parameters before substitution. Other members of the ADM805 family may offer different thresholds or output polarities.