ADM805LARNZ

Supervisors Overview

The ADM805LARNZ is a single-channel voltage supervisory circuit manufactured by Analog Devices Inc. It operates within a supply voltage range of 4.5 V to 5.5 V and features a threshold voltage of 4.65 V with an overvoltage threshold of 4.75 V. The device provides an active high reset output with a minimum reset delay time of 140 ms, extending up to 200 ms in specific configurations. It includes a watchdog timer and battery backup switch functionality. Operating temperatures range from -40°C to +85°C, and it is housed in an 8-SOIC surface-mount package.

Supervisors Feature Summary

• Integrates a watchdog timer for system fault monitoring alongside standard voltage supervision capabilities.
• Provides an active high reset signal to ensure reliable microcontroller initialization during power events.
• Includes a dedicated battery backup switch function to manage power source transitions.

Supervisors Applications

• Embedded systems requiring automated reset generation upon power failure.
• Battery-powered devices utilizing the backup switch feature for seamless power management.
• Industrial control circuits needing watchdog timer protection against software hangs.

Supervisors Procurement Notes

Verify the component status as sources indicate potential obsolescence or end-of-life conditions for this part number. Confirm current availability through authorized distributors and check for valid RoHS compliance documentation before procurement. Ensure the 8-SOIC package dimensions match your PCB footprint requirements.

Supervisors Selection Notes

Select this component when a fixed 4.65 V threshold is required for 5 V logic systems. The active high output simplifies interface design with compatible logic families. Consider the 140 ms to 200 ms reset delay duration to ensure adequate stabilization time for downstream components before system release.

Supervisors Part Context

This device belongs to the ADM805 series of supervisory circuits designed for CMOS applications. It serves as a critical power management element in embedded architectures, providing essential protection against brown-out conditions and ensuring system stability through integrated watchdog and reset mechanisms.

Supervisors Replacement Considerations

Consult official manufacturer documentation for confirmed substitute part numbers. Verify pin compatibility and electrical parameter alignment if considering alternative vendors or updated series revisions.