ADM693AARW

Supervisors Overview

The ADM693AARW is a voltage supervisory circuit manufactured by Analog Devices Inc., designed for monitoring single power supply rails. It operates within a supply voltage range of 4.5 V to 5.5 V, with specific threshold voltages including an undervoltage threshold of 4.25 V and an overvoltage threshold of 4.48 V. The device features a watchdog timer, battery backup switch, and power-fail detection capabilities. It utilizes an SOIC-16 surface-mount package and supports chip enable functionality. The reset delay time is specified at 280 ms, and the operating temperature range extends from -40°C to +85°C.

Supervisors Feature Summary

• Integrates a watchdog timer with programmable clock input for system reliability
• Provides dedicated power-fail output for immediate fault indication
• Includes battery backup switch functionality for seamless power transition management
• Features chip enable pin for low-power standby mode control

Supervisors Applications

• Microprocessor power supply supervision in embedded systems
• Watchdog timer implementation for industrial control units
• Battery backup switching in portable electronic devices
• Power-fail detection circuits for data acquisition systems

Supervisors Procurement Notes

Verify exact suffix compatibility when sourcing replacements, as packaging variations such as reel versus tube may affect handling procedures. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure that the specific revision level matches design requirements, particularly regarding threshold tolerances and thermal characteristics. Cross-reference datasheet specifications against current inventory listings to avoid obsolete part numbers.

Supervisors Selection Notes

Select this component when a single-supervisor IC with integrated watchdog and power-fail signals is required. The SOIC-16 package suits space-constrained surface-mount designs. Consider the 280 ms reset delay and 100 uA quiescent current for low-power applications. Verify that the 4.5 V minimum operating voltage aligns with the target system's rail stability. The chip enable feature offers additional power management flexibility compared to basic supervisors.

Supervisors Part Context

This part belongs to the ADM693A series of voltage supervisory circuits from Analog Devices. It is functionally similar to the MAX693 family but optimized for CMOS processes. The device consolidates multiple protection functions into a single IC, reducing board space and component count. It serves as a critical interface between power management and logic control sections in complex electronic assemblies.

Supervisors Replacement Considerations

The ADM693AARZ is a direct pin-compatible alternative available in tube packaging. The MAX693ACWE+T offers similar functionality in a wide SOIC package with active-high open-drain output. Verify electrical parameter alignment before substitution.