RT9818B-27GU3

Supervisors Overview

The RT9818B-27GU3 is a micro-power voltage detector manufactured by Richtek Technology Corporation. It supervises power supply voltage levels for microprocessors and digital systems. The device features internally fixed threshold levels ranging from 1.2V to 5V in 0.1V steps, with high accuracy of ±1.5%. It operates with a low supply current of 3μA and requires no external components. The functional supply voltage extends down to 0.9V. It provides an N-channel open-drain output and includes built-in recovery delay options such as 0ms, 55ms, 220ms, and 450ms. The reset signal activates when VDD falls below the preset threshold and releases after a delay upon recovery.

Supervisors Feature Summary

• Supervises power supply voltage levels for microprocessors and digital systems
• Provides internally fixed threshold levels with high accuracy
• Features low supply current operation without external components
• Includes built-in recovery delay options and quick reset response

Supervisors Applications

• Microprocessor power supply supervision
• Digital system voltage monitoring
• Battery-powered device power management

Supervisors Procurement Notes

Verify the specific suffix GU3 corresponds to the SC-70-3 package type as documented in the official ordering information. Confirm the threshold voltage code matches the required detection level within the 1.2V to 5V range. Ensure compliance with RoHS and lead-free requirements specified in the datasheet. Cross-reference the manufacturer part number with official Richtek documentation to avoid substitution errors.

Supervisors Selection Notes

Select this component for applications requiring precise voltage supervision with minimal power consumption. The fixed threshold eliminates the need for external resistors, simplifying design. Consider the available recovery delay options to match system startup requirements. Verify that the operating voltage range covers the intended application's supply variations.

Supervisors Part Context

The RT9818 series comprises micro-power voltage detectors designed for supervising power supplies in digital systems. This family offers various package options including SC-82, SC-70-3, SOT-23-3, SOT-23-5, and SOT-89. The devices are characterized by low supply current and high accuracy, making them suitable for portable and battery-operated electronics where power efficiency is critical.

Supervisors FAQ

What is the reset response time of the RT9818B-27GU3?

The device performs a quick reset within 20μs when the supply voltage falls below the preset threshold.

Does the RT9818B-27GU3 require external components for operation?

No, the RT9818B-27GU3 requires no external components as it features internally fixed threshold levels.