ADM823LYRJ-R7

Supervisors Overview

The ADM823LYRJ-R7 is a supervisory circuit from Analog Devices designed to monitor power supply voltage levels and code execution integrity. It operates within a supply voltage range of 1.6 V to 5.5 V, drawing a typical quiescent current of 24 µA. The device features a fixed reset threshold voltage of 3.08 V with 2.5% accuracy and includes an integrated watchdog timer with a manual reset input. It provides a push-pull active-low output and supports a reset delay time of 280 ms. The component is available in a 5-lead SOT-23 package and functions reliably across an extended temperature range of -40°C to +125°C.

Supervisors Feature Summary

• Monitors power supply voltage and code execution integrity via an integrated watchdog timer
• Includes a manual reset input for system control flexibility
• Provides a push-pull active-low reset output signal
• Operates efficiently with low quiescent current consumption

Supervisors Applications

• Portable battery-powered equipment requiring low standby current
• Microprocessor-based systems needing reliable power supervision
• Industrial control systems operating in extended temperature environments
• Embedded applications requiring watchdog timer functionality for code execution monitoring

Supervisors Procurement Notes

Verify the specific suffix RJ-5 confirms the 5-lead SOT-23 package configuration when sourcing. Ensure the order quantity matches the manufacturer's standard reel specifications. Confirm that the required operating temperature range aligns with the specified -40°C to +125°C limits. Check for any regional distribution restrictions or limited availability status before finalizing procurement plans.

Supervisors Selection Notes

Select this component when a single-channel supervisor with both voltage monitoring and watchdog capabilities is required. It is suitable for designs where low quiescent current is critical for battery life. Consider the fixed 3.08 V threshold if it matches the target supply rail. The SOT-23-5 package offers a compact footprint for space-constrained PCB layouts compared to larger packages.

Supervisors Part Context

This part belongs to the ADM823/ADM824/ADM825 family of supervisory circuits. These devices are engineered to provide robust protection for microprocessors and memory systems by detecting under-voltage conditions and ensuring proper software execution through the watchdog feature. The family shares core functionalities but varies in threshold voltages and package options to suit diverse application requirements.

Supervisors Replacement Considerations

Direct substitutes include other parts from the ADM823 series with compatible thresholds and packages. Verify pinout compatibility and electrical specifications such as reset delay and quiescent current when evaluating alternatives. Ensure the replacement supports the same operating voltage range and temperature specifications.