RT9818C-12GV

Supervisors Overview

The RT9818C-12GV is a micro-power voltage detector designed to supervise power supply voltage levels for microprocessors and digital systems. It features an internally fixed threshold level of 1.2V with high accuracy of ±1.5%. The device operates with a low supply current of 3μA and supports a functional supply voltage range down to 0.9V. It provides an N-channel open-drain reset signal that activates when the input voltage falls below the preset threshold. The component includes built-in recovery delay options and ensures quick reset response within 20μs. It is available in small packages including SOT-23-3.

Supervisors Feature Summary

• Provides supervisory function by generating a reset signal when supply voltage drops below a fixed threshold
• Features low supply current consumption of 3μA for energy-efficient operation
• Includes built-in recovery delay to prevent premature release of the reset signal during power-up
• Delivers fast reset response time within 20μs without requiring external components

Supervisors Applications

• Supervising power supply voltage levels for microprocessors
• Monitoring voltage levels in digital systems
• Power-on reset circuits for embedded applications

Supervisors Procurement Notes

Verify the specific suffix GV indicates the SOT-23-3 package configuration as documented in official Richtek ordering information. Confirm the C suffix corresponds to the 1.2V threshold setting. Ensure compliance with RoHS and lead-free requirements specified in the datasheet. Cross-reference the manufacturer part number RT9818C-12GV with distributor codes such as RT9818C-12GV-ND to ensure accurate sourcing from authorized channels.

Supervisors Selection Notes

Select this component when a fixed 1.2V threshold detection is required for microprocessor supervision. The low 3μA supply current makes it suitable for battery-powered or energy-sensitive designs. The N-channel open-drain output allows flexibility in interfacing with various logic families. Verify that the 0.9V minimum operating voltage meets the system's lowest expected supply rail conditions before implementation.

Supervisors Part Context

The RT9818 series consists of micro-power voltage detectors offering internally fixed threshold levels ranging from 1.2V to 5V in 0.1V steps. The RT9818C-12GV specifically denotes the variant with a 1.2V threshold. The series supports multiple package options including SC-70-3, SOT-23-3, and SOT-89. These devices are designed to replace discrete resistor divider solutions, simplifying circuit design while maintaining high accuracy and low power consumption.

Supervisors Replacement Considerations

The RT9818B-50GY is listed as a parameter equivalent alternative within the same product family, though it differs in threshold voltage and potentially package type. Verify pin compatibility and threshold requirements before substitution.