ADM709MAN

Supervisors Overview

The ADM709MAN 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 precision voltage monitor with a fixed threshold of 4.4V, suitable for +5V supply monitoring applications. It operates with a minimum supply voltage of 1V and includes a minimum power-on reset pulse duration of 140ms. The component is housed in an 8-SOIC package and supports a wide operating temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Generates active-low reset signals during power transitions and brownout events
• Provides precise voltage monitoring with a fixed 4.4V threshold
• Maintains reset functionality at supply voltages as low as 1V
• Ensures adequate reset pulse width during power-up sequences

Supervisors Applications

• Microprocessor systems requiring critical power supervision
• Controllers and intelligent instruments needing reliable reset generation
• Automotive systems with strict power monitoring requirements

Supervisors Procurement Notes

Verify the specific suffix MAN against official Analog Devices documentation to confirm the exact threshold voltage and package variant. Check current lifecycle status as some variants may be obsolete or limited supply. Ensure compatibility with existing board layouts regarding the 8-SOIC footprint and thermal characteristics before procurement.

Supervisors Selection Notes

Select this component when a fixed 4.4V threshold is required for +5V rail monitoring. Consider the 140ms minimum reset delay for system timing constraints. Evaluate the 8-SOIC package size against available PCB space. Confirm that the active-low push-pull output drives the target microprocessor reset pin correctly without additional pull-up components.

Supervisors Part Context

The ADM709 series serves as a supervisor circuit for protecting microprocessors from unstable power conditions. It replaces older Maxim Integrated MAX709 equivalents in many designs. The family offers various threshold options to match different standard voltage rails, ensuring robust system initialization and protection against voltage sags or spikes.

Supervisors Replacement Considerations

• MAX709MCSA+