ADM691AARW-REEL

Supervisors Overview

The ADM691AARW-REEL is a microprocessor supervisory circuit manufactured by Analog Devices Inc. It operates within a supply voltage range of 0 V to 5.5 V and monitors a single input channel with a threshold voltage of 4.65 V. The device features an overvoltage threshold of 5 V and includes power-fail detection capabilities. It incorporates a watchdog timer, battery backup switching, and a chip enable signal. The reset delay time is specified at 200 ms, and the maximum power dissipation is 600 mW. It is housed in a 16-pin SOIC package and supports surface-mount installation.

Supervisors Feature Summary

• Integrates a programmable watchdog timer for system stability monitoring
• Provides automatic battery backup switching to maintain data integrity during power transitions
• Includes power-fail detection to alert the processor of voltage anomalies
• Features a chip enable pin for low-power standby control

Supervisors Applications

• Microprocessor system supervision
• Battery-powered equipment requiring backup switching
• Industrial control systems needing watchdog protection
• Embedded systems requiring power-fail signaling

Supervisors Procurement Notes

Verify the exact suffix against official Analog Devices documentation to confirm package type and reel specifications. Ensure compatibility with existing board layouts regarding the SOIC-16 footprint. Confirm that the 200 ms reset delay meets the specific timing requirements of the target microprocessor. Check for any obsolescence notices or lifecycle status updates from the manufacturer before finalizing procurement plans.

Supervisors Selection Notes

Select this component when a single-channel voltage monitor with integrated watchdog functionality is required. It is suitable for applications operating up to 5.5 V where a 4.65 V threshold is appropriate. Consider the 200 ms reset delay and 600 mW power dissipation limits during thermal design. Verify that the open-drain output type aligns with the downstream logic interface requirements.

Supervisors Part Context

This part belongs to the ADM691A series of supervisory circuits designed for CMOS processes. It serves as a dedicated solution for monitoring power rails in digital systems. The device simplifies design by combining voltage monitoring, watchdog, and backup switching functions into a single integrated circuit, reducing component count and board space.

Supervisors Replacement Considerations

Cross-reference with other ADM691 variants or MAX691 equivalents if pinout and electrical parameters match. Verify that substitute parts offer compatible reset delays and output drive types. Ensure replacement components support the same operating temperature range and package dimensions.