ADM709RAR

Supervisors Overview

The ADM709RAR is a power-supply supervisor integrated circuit manufactured by Analog Devices Inc. It monitors a single voltage input and generates a reset signal when the supply drops below a specific threshold. The device features an active-low, push-pull output driver compatible with standard logic families. It operates within a supply voltage range of 1 V to 5.5 V and supports a maximum monitored voltage of 4.75 V. The component provides a fixed reset delay time of 280 ms to ensure stable power-up sequencing. It is housed in an 8-pin SOIC package and is rated for industrial operating temperatures from -40°C to +85°C.

Supervisors Feature Summary

• Monitors a single power rail for under-voltage conditions
• Generates an active-low reset signal via a push-pull output
• Includes a fixed internal reset delay timer for power-on stability
• Operates across a wide supply voltage range up to 5.5 V

Supervisors Applications

• Microprocessor and microcontroller system supervision
• Battery-powered equipment power management
• Industrial control board voltage monitoring
• Communication systems power integrity verification

Supervisors Procurement Notes

Verify the exact suffix configuration against official datasheets, as variations may indicate different thresholds or packages. Confirm current production status, as this part number may be subject to end-of-life notices or limited availability. Ensure compatibility with existing PCB footprints and thermal requirements before finalizing procurement decisions.

Supervisors Selection Notes

Select this component when a fixed threshold supervisor is required for standard 3.3 V or 5 V logic systems. Consider the 280 ms reset delay duration relative to system startup requirements. Evaluate the 8-pin SOIC package constraints against available board space. Verify that the 4.75 V maximum monitored voltage aligns with the target power rail specifications.

Supervisors Part Context

The ADM709 series belongs to Analog Devices' portfolio of simple voltage supervisors designed for basic power management tasks. These devices are engineered to replace discrete comparator circuits, offering reduced component count and improved reliability. The family typically includes variants with different reset thresholds and delay times to suit various application needs.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers include MAX709RESA+ and MAX709TEPA+. Verify pinout compatibility and electrical parameter alignment before substitution.