ADM1817-R22ART-RL7

Supervisors Overview

The ADM1817-R22ART-RL7 is a voltage supervisory circuit manufactured by Analog Devices Inc., designed for monitoring power supply voltages. It operates within a supply voltage range up to 5.5 V and features a fixed reset threshold of 2.18 V. The device provides a push-pull output type with a reset delay time of 250 ms. It is housed in an SOT-23-3 package, suitable for surface mount installation. The component supports an operating temperature range from -40°C to +105°C and consumes a typical quiescent current of 16 µA. This single-input supervisor lacks manual reset, watchdog timer, or battery backup switch functionalities.

Supervisors Feature Summary

• Provides reliable low-cost voltage monitoring with a dedicated reset output for system protection.
• Features a push-pull output stage capable of driving downstream logic directly without additional pull-up components.
• Designed for compact applications utilizing the small SOT-23-3 surface-mount package.

Supervisors Applications

• Monitoring 2.5 V, 3 V, 3.3 V, and 5 V power supply rails in embedded systems.
• Providing power-on reset signals for microprocessors and digital logic circuits.
• Ensuring system stability in portable electronic devices requiring low standby current.

Supervisors Procurement Notes

Verify component authenticity through authorized distributors due to discontinued status. Confirm lot traceability and RoHS compliance documentation prior to acquisition. Check for obsolescence notices from Analog Devices. Ensure storage conditions meet manufacturer specifications to prevent degradation. Validate pinout compatibility with existing PCB footprints before integration.

Supervisors Selection Notes

Select this part when a fixed 2.18 V threshold is required for specific logic levels. Consider the push-pull output if active high drive capability is needed without external resistors. Evaluate the 250 ms reset delay against system startup timing requirements. Compare quiescent current consumption against other supervisors in the ADM1817 series for power-sensitive designs.

Supervisors Part Context

This component belongs to the ADM1817 series of microprocessor reset circuits from Analog Devices. The series offers various threshold options including 2.5 V, 3 V, 3.3 V, and 5 V variants. The R22 suffix indicates the specific 2.18 V threshold version. Other series members may differ in package types or additional features like watchdog timers.

Supervisors Replacement Considerations

Direct substitutes include other ADM1817 variants with similar thresholds or packages. Verify electrical parameters such as reset delay and quiescent current match design requirements. Check pinout compatibility for SOT-23-3 packages. Consider newer generations from Analog Devices if long-term availability is critical.