The RT9819C-30PV is a voltage detector manufactured by Richtek USA Inc. This device is designed to monitor the supply voltage of electronic systems and generate a reset signal when the voltage drops below a specified threshold. This helps prevent erratic behavior and data corruption in microprocessors and other digital circuits.

Applications

• Microcontroller-based systems
• Embedded systems
• Power supply monitoring
• Battery-powered applications
• Industrial automation equipment

Features

• High-accuracy voltage detection
• Low quiescent current
• Open-drain reset output
• Fixed threshold voltage
• Small package size

Benefits

• Ensures system stability by preventing malfunctions caused by undervoltage conditions.
• Simplifies system design with integrated voltage monitoring.
• Reduces power consumption in battery-powered devices.
• Provides a reliable reset signal for system initialization and error recovery.
• Saves board space.

Additional Details

The RT9819C-30PV integrates an internal, high-precision voltage reference and a comparator to accurately detect the input voltage. When the voltage falls below the preset threshold (3.0V for this particular variant), the open-drain output is asserted low, creating a reset signal. This signal can be used to reset microprocessors, microcontrollers, and other digital circuits. When the voltage rises above the threshold, the output is de-asserted high after a defined delay. An external pull-up resistor is required for the open-drain output configuration. The device's low quiescent current makes it well-suited for battery-powered applications and other energy-sensitive designs. It is available in a small package to minimize PCB footprint.