The RE5VA47A is a voltage detector (voltage supervisor) manufactured by Ricoh Electronic Devices. It is designed to monitor the voltage level of a power supply and generate a reset signal when the voltage drops below a certain threshold. This is crucial for ensuring the proper operation of microcontrollers and other sensitive electronic components.

Applications

• Microcontroller reset: Provides a reliable reset signal to microcontrollers during power-up and brown-out conditions.
• Power supply monitoring: Monitors the voltage of power supplies and generates an alert signal if the voltage drops below the acceptable range.
• Battery-powered devices: Protects battery-powered devices from deep discharge.
• System monitoring: Monitors the voltage of critical components in a system.
• Industrial control systems: Provides a reliable reset signal in harsh industrial environments.

Features

• High-accuracy voltage detection: Accurately detects voltage levels with minimal error.
• Low current consumption: Minimizes power consumption in battery-powered applications.
• Small package size: Available in small packages, such as SOT-23, for space-constrained applications.
• Wide operating voltage range: Operates over a wide range of input voltages.
• Open drain output: Provides a flexible output configuration for various applications.
• Fixed detection voltage: Preset voltage detection threshold for ease of use.

Benefits

• Improved system reliability: Prevents system malfunctions due to voltage drops.
• Extended battery life: Low current consumption extends battery life in portable devices.
• Simplified design: Easy to integrate into existing designs.
• Reduced system cost: Integrated functionality reduces the need for external components.
• Enhanced protection: Protects sensitive components from damage due to voltage fluctuations.

Additional Details

The RE5VA47A has a detection voltage of 4.7V. It typically consumes very low quiescent current, usually in the order of a few microamperes. The output is an N-channel open drain output, which requires a pull-up resistor. It is available in a SOT-23 package. It operates across an industrial temperature range.

The open drain output gives the designer flexibility in choosing the pull up voltage and resistance to tailor the part to the specific requirements of the circuit it is being used in.