ADM709LARZ

Supervisors Overview

The ADM709LARZ is a power supply monitor integrated circuit manufactured by Analog Devices Inc. It generates a system reset signal during power-up, power-down, and brownout conditions to protect microprocessor systems. The device features a low quiescent current of 35 µA and operates with supply voltages as low as 1 V. It provides a minimum power-on reset pulse duration of 140 ms. The component is available in an 8-pin SOIC package and supports monitoring for +5 V, +3.3 V, and +3 V supply rails.

Supervisors Feature Summary

• Generates system reset signals during power-up, power-down, and brownout events
• Maintains operational functionality with supply voltages down to 1 V
• Provides a guaranteed minimum power-on reset pulse duration of 140 ms
• Available in low-cost 8-pin DIP and SOIC packages

Supervisors Applications

• Microprocessor systems
• Computers and controllers
• Intelligent instruments
• Critical microprocessor power monitoring
• Automotive systems

Supervisors Procurement Notes

Verify the specific voltage threshold variant required for the application, as the ADM709 family includes options for +5 V, +3.3 V, and +3 V monitoring. Confirm package availability, as the L suffix typically denotes a specific package type such as SOIC or DIP depending on the manufacturer's current coding standards. Check for end-of-life status or obsolescence notices from Analog Devices before finalizing procurement plans.

Supervisors Selection Notes

Select the ADM709LARZ when a simple, cost-effective supervisor is needed for critical power monitoring without additional features like watchdog timers or manual resets. Ensure the monitored rail matches the specific threshold variant (e.g., +5 V, +3.3 V, or +3 V) associated with the part number suffix. Consider the 35 µA quiescent current for battery-powered applications where low standby power is essential.

Supervisors Part Context

The ADM709 series serves as a direct upgrade to the Maxim Integrated MAX709 line, maintaining pin compatibility and functional equivalence while offering enhanced performance characteristics. This family of devices is designed for reliable operation in industrial and automotive environments, providing robust protection against unstable power conditions through precise voltage monitoring and timed reset generation.

Supervisors Replacement Considerations

Public confirmed substitute part numbers include MAX709 variants such as MAX709MCSA+ and MAX709LESA+. These components offer similar functionality and pinouts, facilitating drop-in replacements in existing designs that originally utilized Maxim Integrated parts.