ADM709LAR

Supervisors Overview

The ADM709LAR 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 ensure microprocessor reliability. The device features a low quiescent current of 35 µA and includes a minimum power-on reset pulse duration of 140 ms. It operates with a supply voltage range from 1 V to 5.5 V and offers a reset threshold accuracy of 2.5%. The component is available in an 8-pin SOIC package and supports industrial temperature ranges.

Supervisors Feature Summary

• Generates precise system reset signals during power transitions and brownout events
• Maintains operational functionality with supply voltages as low as 1 V
• Provides a guaranteed minimum power-on reset pulse duration for stable initialization
• Features low quiescent current consumption suitable for battery-powered applications

Supervisors Applications

• Microprocessor systems requiring critical power monitoring
• Computers and controllers needing reliable reset generation
• Automotive systems with strict power supervision requirements
• Intelligent instruments demanding brownout protection

Supervisors Procurement Notes

Verify the specific suffix 'L' indicates the -40°C to +85°C industrial temperature grade and the 'A' denotes the 4.4V threshold variant. Confirm RoHS compliance status and check for end-of-life notices or obsolescence warnings from Analog Devices before finalizing procurement plans due to potential availability constraints.

Supervisors Selection Notes

Select this component when a fixed threshold supervisor is required for standard logic levels. Ensure the 4.4V threshold aligns with the target rail voltage. Consider the 8-pin SOIC package constraints and verify that the 140ms reset delay meets the system startup timing requirements without additional external components.

Supervisors Part Context

The ADM709 series serves as a direct upgrade to the Maxim MAX709 family, offering enhanced performance in a compact footprint. It functions as a simple reset generator and power-supply monitor, widely used in embedded designs where cost-effective and reliable voltage supervision is essential for preventing erratic microcontroller behavior during unstable power conditions.

Supervisors Replacement Considerations

Public confirmed substitute part numbers include MAX709MCSA+ and MAX709MESA+. Verify pin compatibility and threshold voltage matching before substitution. Check manufacturer documentation for any functional differences regarding reset timing or output drive capabilities.