ADM825MYKS-R7

Supervisors Overview

The ADM825MYKS-R7 is a supervisory circuit from Analog Devices designed to monitor power supply voltage levels and code execution integrity in microprocessor-based systems. It features a manual reset input and push-pull output stages, providing RESET and /RESET signals. The device includes a watchdog timer with a 1.6-second timeout period to ensure system stability. It operates within an automotive temperature range and offers low power consumption of 5 µA. The component is housed in a 5-lead SC70 package.

Supervisors Feature Summary

• Monitors power supply voltage levels with precision thresholds ranging from 2.19 V to 4.63 V
• Includes an on-chip watchdog timer with a 1.6-second timeout for code execution integrity
• Features a manual reset input allowing external assertion of reset signals
• Provides dual push-pull output stages for RESET and /RESET signals

Supervisors Applications

• Microprocessor systems requiring voltage supervision
• Computers and controllers needing code execution monitoring
• Intelligent instruments with strict reset requirements
• Portable equipment demanding low power consumption

Supervisors Procurement Notes

Verify the specific threshold voltage option required, as the ADM825 family offers multiple reset threshold options between 2.19 V and 4.63 V. Confirm that the 5-lead SC70 package aligns with your PCB layout constraints. Ensure the 1.6-second watchdog timeout meets your system's timing specifications. Check for automotive grade qualification if operating in harsh environments. Validate compatibility with your microprocessor's reset signal polarity and drive requirements.

Supervisors Selection Notes

Select this component when both power supply monitoring and code execution integrity are required in a compact form factor. The inclusion of a manual reset input makes it suitable for systems needing user-initiated resets. The low 5 µA current consumption is ideal for battery-powered portable devices. Consider the 1.6-second watchdog timeout against your processor's maximum strobe interval. The push-pull outputs simplify interface design compared to open-drain alternatives.

Supervisors Part Context

The ADM825 is part of the ADM823/ADM824/ADM825 family of supervisory circuits from Analog Devices. These components share similar core functionalities but differ in available inputs and output configurations. The ADM825 specifically combines a watchdog timer with a manual reset input and dual push-pull outputs. This distinguishes it from the ADM823, which lacks a manual reset, and the ADM824, which has different output stage options. All members support automotive temperature ranges.

Supervisors Replacement Considerations

Direct substitutes include ADM823MYKS-R7 and ADM824MYKS-R7 from the same manufacturer. Verify that the alternative part's reset threshold matches your system's voltage requirements. Ensure the watchdog timeout period is compatible with your microprocessor's operation. Confirm that the output stage configuration (push-pull vs. open-drain) fits your circuit design. Package compatibility must be verified for pin-to-pin replacement.