ADM805LAN

Supervisors Overview

The ADM805LAN is a microprocessor supervisory circuit manufactured by Analog Devices Inc., designed for precise voltage monitoring and system reset management. It features a fixed threshold voltage of 4.65 V, ensuring accurate detection of power supply deviations. The device provides an active high reset output with a typical timeout delay of 200 ms to prevent premature resetting during power-up sequences. Integrated functionalities include a watchdog timer for fault recovery and a backup battery switchover mechanism to maintain system integrity during main power loss. Operating within a supply voltage range of 4.5 V to 5.5 V, it supports single-input monitoring in an SOIC-8 surface-mount package, suitable for commercial temperature ranges from -40°C to +85°C.

Supervisors Feature Summary

• Integrates precision voltage monitoring with a fixed 4.65 V threshold for reliable power supervision.
• Includes a built-in watchdog timer to detect software faults and trigger system recovery.
• Features automatic backup battery switchover to maintain critical data during primary power failure.
• Provides an active high reset signal with a defined 200 ms timeout delay for stable initialization.

Supervisors Applications

• Microprocessor system reset generation in embedded controllers
• Watchdog timer implementation for fault detection in industrial automation
• Backup battery switchover circuits for non-volatile memory protection
• Power fail warning systems in telecommunications equipment

Supervisors Procurement Notes

Verify the specific suffix 'L' against the manufacturer's current datasheet to confirm package type and temperature grade accuracy. Confirm availability status as lifecycle notices may indicate obsolescence or end-of-life status for this component variant. Ensure compliance with RoHS directives and check for any recent manufacturing changes that might affect pin compatibility or electrical characteristics before finalizing procurement orders.

Supervisors Selection Notes

Select the ADM805LAN when a fixed 4.65 V threshold is required for standard 5 V logic systems. Choose this part if integrated watchdog and battery switchover functions are needed to minimize external component count. Consider the SOIC-8 package for surface-mount assembly constraints. Verify that the active high reset polarity matches the target microprocessor input requirements. Ensure the operating temperature range meets the environmental specifications of the intended application.

Supervisors Part Context

The ADM805LAN belongs to the ADM805 series of low-power microprocessor supervisory circuits from Analog Devices. This family is designed to provide essential power management functions including voltage monitoring, reset generation, and watchdog timing in a compact footprint. The series typically includes variants with different threshold voltages and reset polarities to suit various digital logic families. These components are widely used in applications requiring reliable system supervision without complex external circuitry.

Supervisors Replacement Considerations

Direct substitutes include the ADM805LARNZ and ADM805LMAN, which share identical functional specifications but may differ in package type or temperature range. Cross-reference with SP805LCP-L or SP805SEN-L from other manufacturers for pin-compatible alternatives, verifying threshold voltage and reset polarity alignment. Ensure any replacement maintains the same watchdog timeout and battery switchover capabilities to preserve system design integrity.