ADM1818-R22AKS-RL

Supervisors Overview

The ADM1818-R22AKS-RL is a single-channel voltage supervisor integrated circuit manufactured by Analog Devices Inc. It operates within a supply voltage range of 1.6 V to 5.5 V and features a fixed threshold voltage of 2.20 V for monitoring power rails. The device provides an active-low reset output with a typical reset delay time of 140 ms, ensuring stable system initialization during power-up or brown-out events. Designed for surface-mount applications, it is housed in a compact SC-70 (SOT-323) package, making it suitable for space-constrained portable electronics and embedded systems requiring reliable power management supervision.

Supervisors Feature Summary

• Provides precise voltage supervision with a fixed 2.20 V threshold for accurate power rail monitoring
• Features an active-low open-drain reset output compatible with various logic families
• Includes internal reset delay timer to prevent false triggering during power transitions
• Operates over an extended industrial temperature range from -40°C to +125°C

Supervisors Applications

• Portable consumer electronics requiring low-voltage power supervision
• Embedded microcontroller systems needing reliable power-on reset signals
• Battery-powered devices with strict voltage threshold requirements
• Industrial control modules operating in harsh environmental conditions

Supervisors Procurement Notes

Verify the exact suffix 'R22' confirms the 2.20 V threshold variant, as Analog Devices uses specific alphanumeric codes to denote threshold voltages. Confirm the 'KS' package code corresponds to the SC-70-3 form factor required for your PCB layout. Check current lifecycle status, as older revision numbers may indicate end-of-life products requiring qualification for new designs. Ensure compatibility with your system's logic levels given the open-drain output configuration.

Supervisors Selection Notes

Select this component when a fixed 2.20 V supervision point is required for low-voltage digital circuits. The SC-70 package offers minimal footprint compared to larger SOIC options. Consider the open-drain output requirement for pull-up resistor implementation in your design. Evaluate if the 140 ms reset delay meets your system's startup timing constraints. Compare against adjustable supervisors if flexible threshold settings are needed for multi-rail architectures.

Supervisors Part Context

This part belongs to the ADM1818 series of simple reset supervisors designed for cost-sensitive applications. The series typically includes variants with different threshold voltages and output polarities. Analog Devices positions these components as fundamental building blocks for power management in portable and industrial equipment. The R22 designation specifically identifies the 2.20 V threshold version within this family.

Supervisors Replacement Considerations

ADM1818-R22AKSZ-R7 is listed as a parameter-equivalent alternative in public distributor records.