The RT9809-26CV is a voltage detector manufactured by Richtek USA Inc. It is designed to monitor voltage levels and provide a reset signal to a microcontroller or other system component when the voltage drops below a specified threshold. This functionality is crucial in preventing system failures and ensuring data integrity, especially in battery-powered or unstable power environments.

Applications

• Portable electronics
• Microcontroller systems
• Embedded systems
• Power management systems
• Battery monitoring

Features

• Precise voltage detection: Accurately monitors the supply voltage to ensure reliable reset generation.
• Low quiescent current: Minimizes power consumption, making it ideal for battery-powered applications.
• Open-drain output: Flexible output configuration for interfacing with various microcontrollers.
• Hysteresis: Built-in hysteresis to prevent chattering and ensure stable operation.
• Small package size: Available in compact packages for space-constrained applications.

Benefits

• Prevents system malfunction: Resets the system when the voltage drops below the threshold, preventing unexpected behavior.
• Data integrity: Protects data from corruption by initiating a reset before the voltage becomes too low for reliable operation.
• Prolonged battery life: Low quiescent current minimizes power consumption, extending the operational life of battery-powered devices.
• Easy integration: Open-drain output simplifies interfacing with other components in the system.
• Compact design: Small package size allows for use in space-constrained applications.

Additional Details

The RT9809-26CV features a detection voltage of 2.6V. The open-drain output requires an external pull-up resistor. The device provides hysteresis to prevent oscillations or false triggering of the reset signal due to noise or minor voltage fluctuations. It operates over a wide temperature range, making it suitable for various operating environments. Its primary function is to monitor the power supply voltage and assert a reset signal when the voltage falls below the specified threshold. This helps ensure proper operation of the connected microcontroller or other digital circuitry. The small package allows for easy placement on PCBs, even in densely packed designs.