ADM1817-R22ART-RL

Supervisors Overview

The ADM1817-R22ART-RL is a voltage supervisory circuit manufactured by Analog Devices Inc., designed to monitor power supply voltages and generate a reset signal. It operates within a supply voltage range up to 5.5 V and features a push-pull output type. The device provides a fixed reset threshold level of 2.18 V, ensuring reliable monitoring for systems requiring this specific voltage reference. It includes a reset delay time of 250 ms and consumes a typical operating supply current of 16 uA. The component is housed in an SOT-23-3 surface-mount package and supports operation across a temperature range from -40°C to +105°C.

Supervisors Feature Summary

• Provides reliable low-cost voltage monitoring with a dedicated reset output
• Suitable for monitoring standard power supply voltages including 2.5 V, 3 V, 3.3 V, and 5 V rails
• Features a fixed reset threshold level of 2.18 V for precise supervision

Supervisors Applications

• Microprocessor reset circuits
• Portable equipment power management
• Battery-powered system supervision

Supervisors Procurement Notes

Verify the exact suffix and revision status before procurement, as the ADM1817 series has been discontinued by Analog Devices. Confirm that the 2.18 V threshold aligns with your design requirements, as other variants offer different thresholds. Check for RoHS compliance details and ensure the SOT-23-3 package fits your PCB layout constraints. Since availability is limited or non-existent through major distributors, validate the source authenticity and lead times carefully.

Supervisors Selection Notes

Select this component only if a 2.18 V reset threshold is explicitly required for the monitored rail. Consider the 16 uA quiescent current for battery life calculations. Ensure the 250 ms delay meets the system's startup timing requirements. Verify that the SOT-23-3 package is compatible with the assembly process. Note that alternative parts may be needed due to discontinuation status.

Supervisors Part Context

The ADM1817 series belongs to Analog Devices' line of microprocessor reset circuits. These devices are designed to provide cost-effective supervision for digital systems. The R22 variant specifically sets the reset threshold at 2.18 V. The ART suffix indicates the SOT-23-3 package, while RL denotes reel packaging. This family is known for simplicity and reliability in basic voltage monitoring applications.

Supervisors Replacement Considerations

Public confirmed substitute part numbers: None available. The ADM1817 series is discontinued.