ADM690AAN

Supervisors Overview

The ADM690AAN is a microprocessor supervisory circuit manufactured by Analog Devices Inc. It operates within a supply voltage range of 4.75 V to 5.5 V, featuring a precise threshold voltage of 4.65 V for power monitoring. The device provides a reset timeout delay of 200 ms and includes a watchdog timer function. It supports battery backup switchover and power failure warning capabilities. The component utilizes an open collector output type and lacks manual reset or chip enable signals. It is housed in an 8-pin PDIP package with through-hole mounting. Operating temperatures range from -40°C to +85°C, with a maximum power dissipation of 400 mW.

Supervisors Feature Summary

• Integrates precision voltage monitoring with automatic battery backup switchover functionality
• Includes built-in watchdog timer for system reliability and power failure warning detection
• Provides active-low reset assertion down to low supply voltages without manual intervention

Supervisors Applications

• Microprocessor reset circuits requiring precise voltage supervision
• Battery-backed memory systems utilizing backup switchover features
• CMOS RAM write protection applications

Supervisors Procurement Notes

Verify component authenticity and physical condition upon receipt. Confirm the specific suffix matches the required package and electrical specifications. Check for RoHS compliance status as indicated in official documentation. Ensure storage conditions maintain integrity prior to assembly. Review datasheet revisions for any functional updates.

Supervisors Selection Notes

Select this component when a fixed 4.65 V threshold is required for 5 V CMOS logic systems. Consider the open collector output configuration for interface compatibility. Evaluate the 200 ms reset delay against processor startup requirements. Verify that the through-hole PDIP package fits the target PCB layout constraints.

Supervisors Part Context

This part belongs to the ADM690A series of supervisory circuits designed for microprocessor applications. It complements similar models like the ADM690AARMZ, differing primarily in package style and manufacturing process. The series focuses on providing complete power management solutions including reset, watchdog, and battery control functions.

Supervisors Replacement Considerations

Public confirmed substitute part numbers include MAX817LCUA+.