ADM1818-R22AKS-RL7

Supervisors Overview

The ADM1818-R22AKS-RL7 is a voltage supervisory circuit manufactured by Analog Devices Inc. It functions as a simple reset generator with a fixed threshold voltage of 2.18 V. The device features an open-drain or open-collector output type and provides a low-active reset signal. It operates within a supply voltage range up to 5.5 V, with a typical reset timeout of 100 ms minimum. The component is housed in a SC-70-3 (SOT-323) surface-mount package and supports manual reset functionality. It is designed for monitoring single-input power rails.

Supervisors Feature Summary

• Provides reliable voltage supervision with a fixed reset threshold
• Features open-drain or open-collector output for flexible interfacing
• Supports manual reset input for system control

Supervisors Applications

• Monitoring 2.5 V, 3 V, 3.3 V, and 5 V power supply voltages
• Embedded systems requiring simple power-on reset generation
• Portable electronic devices with limited board space

Supervisors Procurement Notes

This component is officially discontinued and no longer in production. Verification of availability should focus on obsolete stock or secondary market sources. Confirm the specific suffix 'R22' corresponds to the 2.18 V threshold variant when sourcing replacements. Ensure compatibility with existing PCB footprints and design-in requirements before procurement.

Supervisors Selection Notes

Select this part only if the 2.18 V threshold aligns precisely with the monitored rail's brown-out requirements. Consider the open-drain output requirement for pull-up resistor implementation. Evaluate alternative active parts from the same family if long-term supply stability is critical, as this specific reel-packaged variant is end-of-life.

Supervisors Part Context

The ADM1818 series comprises low-cost voltage supervisors designed for monitoring standard logic supply voltages. This specific model belongs to the ADM1818 family, which offers various fixed threshold options. The R22 suffix denotes the 2.18 V threshold version. The device is part of Analog Devices' portfolio of power management ICs focused on system reliability.

Supervisors Replacement Considerations

ADM1818-R23AKSZ-R7 is documented as a parameter-equivalent substitute.