The BD4943FVE-TR is a voltage detector IC manufactured by Rohm Semiconductor. As a voltage supervisor, its primary function is to monitor the voltage levels in electronic circuits and generate a reset signal when the voltage drops below a predetermined threshold. This safeguards the connected microcontroller or other critical components from operating with insufficient power, preventing erratic behavior, data corruption, and potential hardware damage.

Applications

• Microcontroller Reset Circuits: Primarily used to provide a reliable reset signal to microcontrollers during power-up or voltage drops, ensuring proper initialization and operation.
• CPU Voltage Monitoring: Monitors the core voltage of CPUs in embedded systems and computers, triggering a reset or interrupt if the voltage falls outside the specified range.
• Power Supply Monitoring: Safeguards electronic devices against power supply failures by detecting under-voltage conditions and initiating a controlled shutdown.
• Battery-Powered Devices: Protects batteries from deep discharge by disabling the device when the battery voltage reaches a critical low level, extending battery life and preventing damage.
• Industrial Control Systems: Provides reliable voltage monitoring in industrial equipment, ensuring safe and stable operation of critical machinery and control systems.

Features

• High-Accuracy Voltage Detection: Offers precise voltage detection thresholds, ensuring reliable reset operation and preventing false triggers.
• Low Current Consumption: Minimizes power consumption, making it ideal for battery-powered and energy-efficient applications.
• Small Package Size: Available in compact packages, facilitating easy integration into space-constrained designs.
• Open Drain Output: Provides flexible interfacing with various microcontroller and system architectures.
• Wide Operating Temperature Range: Operates reliably over a broad temperature range, suitable for use in harsh environments.

Benefits

• Prevents System Malfunctions: Safeguards against system crashes and data corruption caused by undervoltage conditions, ensuring reliable operation.
• Ensures Stable Operation: Maintains stable operation of microcontrollers and other sensitive components by continuously monitoring voltage levels.
• Protects Against Battery Damage: Prevents deep discharge of batteries in portable devices, extending battery life and preventing potential damage.
• Improves System Reliability: Enhances the overall reliability of electronic systems by providing a robust voltage monitoring and reset function.
• Simplifies Circuit Design: The open-drain output configuration simplifies integration into existing systems.

Additional Details: The BD4943FVE-TR has a typical detection voltage of 4.3V. The package is a small VSON package. The output configuration is N-channel open drain, allowing for easy level shifting and integration with different logic families. The operating temperature range is typically -40°C to +125°C. The supply voltage range typically spans 1.0V to 5.5V. The "-TR" suffix typically indicates tape and reel packaging for automated assembly.