ADM691AARU-REEL

Supervisors Overview

The ADM691AARU-REEL is a microprocessor supervisory circuit manufactured by Analog Devices Inc., designed for power supply monitoring and battery control in embedded systems. It operates within a maximum supply voltage of 5.5 V and features a reset threshold of 4.65 V with an overvoltage threshold of 4.75 V. The device provides a fixed reset delay time of 280 ms and includes a watchdog timer, battery backup switching, and power-failure detection capabilities. It draws a typical operating current of 100 uA and supports chip enable functionality. The component is housed in a TSSOP-16 surface-mount package and functions across an industrial temperature range from -40 C to +85 C.

Supervisors Feature Summary

• Integrates complete single-chip solutions for microprocessor reset, backup-battery switchover, and CMOS RAM write protection.
• Features low power consumption with adjustable standby current and precision voltage monitoring with tight tolerance.
• Includes automatic battery backup power switching and fast onboard gating of chip enable signals.

Supervisors Applications

• Microprocessor systems requiring reliable power supervision
• Computers and controllers needing watchdog timer protection
• Automotive systems with critical power monitoring requirements

Supervisors Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging rather than tube packaging when sourcing. Confirm RoHS compliance status through official manufacturer documentation as distribution listings may vary. Check for end-of-life notices or obsolescence warnings, as some sources indicate potential discontinuation for related variants in this family. Ensure the supplier provides valid traceability documents for quality assurance.

Supervisors Selection Notes

Select this component when a fixed 4.65 V threshold and 280 ms reset delay are required for system stability. Consider the TSSOP-16 package for space-constrained surface-mount designs. Evaluate the 100 uA operating current against total system power budgets. Verify that the integrated watchdog and battery backup features meet the application's safety and reliability standards without requiring external components.

Supervisors Part Context

This part belongs to the ADM691A/ADM693A/ADM800L/ADM800M family of supervisory circuits, which serves as an upgrade path for the MAX691A/93A/800M series. The family provides comprehensive power management functions including voltage monitoring, reset generation, and memory protection. The ADM691A variant specifically targets applications requiring precise voltage supervision with integrated watchdog capabilities.

Supervisors Replacement Considerations

Public confirmed substitute part numbers include ADM691AARNZ and ADM691AARUZ. These variants share identical electrical specifications but differ in packaging format (tube vs. reel) or lead-free compliance status. Verify pin compatibility and thermal performance before substitution.