ADM690AARNZ

Supervisors Overview

The ADM690AARNZ is a microprocessor supervisory circuit manufactured by Analog Devices Inc., housed in an SOIC-8 surface-mount package. It monitors a single voltage input with a fixed threshold of 4.65 V and features an open-collector output type. The device includes a watchdog timer, battery backup switchover capability, and power-fail detection. It operates within a supply voltage range up to 5.5 V, with a reset delay time of 200 ms. The component functions reliably across an industrial temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Integrates precision voltage monitoring with a dedicated watchdog timer for system reliability.
• Provides automatic battery backup switchover to maintain data integrity during primary power loss.
• Includes power-fail warning functionality to alert the system of impending voltage drops.

Supervisors Applications

• Microprocessor reset circuits requiring precise voltage supervision
• Battery-powered systems needing automatic backup switchover
• Industrial control units operating in extended temperature environments

Supervisors Procurement Notes

Verify current lifecycle status as the part may be obsolete or subject to discontinuation. Confirm package compatibility and pinout alignment with existing PCB layouts. Ensure thermal management meets specifications for the intended operating environment. Check for alternative sourcing options if original manufacturer stock is unavailable.

Supervisors Selection Notes

Select this component when a fixed 4.65 V threshold is required for CMOS process ICs. Consider the open-collector output configuration for interface compatibility. Evaluate the need for integrated watchdog and battery backup features versus discrete solutions. Verify that the SOIC-8 package fits the available board space constraints.

Supervisors Part Context

This component belongs to the ADM690A series of supervisory circuits designed for robust power management. It complements other variants like the ADM692A which offer different thresholds. The series focuses on providing essential protection functions for digital systems without requiring external components for basic operation.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not explicitly listed in the provided documentation for direct replacement. Verify functional equivalence regarding threshold voltage and package dimensions before considering alternatives.