ADM691AARN-REEL

Supervisors Overview

The ADM691AARN-REEL7 is a microprocessor supervisory circuit manufactured by Analog Devices Inc. It provides complete single-chip solutions for power supply monitoring and battery control functions in microprocessor systems. The device features a precision voltage monitor with ±2% tolerance, an adjustable watchdog timer, and automatic battery backup power switching. It operates within a supply voltage range up to 5.5 V and includes a reset time delay of 200 ms or adjustable timing. The component supports CMOS RAM write protection and power-failure warning, utilizing a SOIC-16 package.

Supervisors Feature Summary

• Integrates microprocessor reset, backup-battery switchover, and watchdog timer functions on a single chip
• Provides precision voltage monitoring with tight tolerance for reliable system supervision
• Features automatic battery backup power switching to maintain data integrity during power loss
• Supports fast onboard gating of chip enable signals for enhanced system control

Supervisors Applications

• Microprocessor systems requiring comprehensive power supervision
• Computers and controllers needing reliable reset and watchdog mechanisms
• Intelligent instruments demanding precise voltage monitoring
• Automotive systems with critical microprocessor power monitoring requirements

Supervisors Procurement Notes

Verify the exact suffix designation when ordering, as REEL and REEL7 indicate specific tape-and-reel packaging configurations from the manufacturer. Confirm that the SOIC-16 package matches your PCB footprint design. Ensure the operating temperature range aligns with your application environment. Cross-reference the datasheet revision to confirm feature compatibility with previous generations like the MAX691A family.

Supervisors Selection Notes

Select this component when a unified solution for reset, watchdog, and battery backup is required. Consider the ±2% voltage monitor tolerance for precision applications. Evaluate the need for adjustable versus fixed reset delays based on system startup requirements. Compare against the MAX691A family if legacy compatibility is necessary, noting the ADM691A offers upgraded performance characteristics.

Supervisors Part Context

The ADM691A belongs to a family of supervisory circuits that also includes the ADM693A, ADM800L, and ADM800M. These devices serve as upgrades to the Maxim MAX691A/93A/800M series. The family is designed to replace discrete components by integrating multiple power management functions into a compact CMOS process IC, simplifying board layout and reducing component count in embedded designs.

Supervisors Replacement Considerations

The MAX691A is a direct predecessor in the product line. Verify pinout compatibility and electrical parameter alignment before substitution. Check if the specific reset delay and voltage threshold tolerances meet the target system specifications.