The BD4849FVE is a voltage detector IC produced by Rohm Semiconductor, designed to monitor supply voltage levels and generate a reset signal when the voltage drops below a predefined threshold. This supervisory function is crucial for maintaining stable operation in various electronic systems, especially those powered by batteries or subject to fluctuating power sources. The device prevents data corruption and system malfunctions by ensuring a controlled reset during undervoltage conditions.

Applications

• Microcontroller Reset Circuits: Provides a reliable reset signal for microcontrollers during power-up, power-down, or brownout conditions.
• Memory Protection: Safeguards data stored in volatile memory by initiating a reset or shutdown sequence when the supply voltage drops below a critical level.
• Power Management Systems: Monitors voltage levels in power management circuits and provides a reset signal to protect sensitive components from undervoltage conditions.
• Automotive Electronics: Ensures reliable operation of automotive electronic systems by detecting and responding to undervoltage conditions, which may occur due to battery drain or electrical disturbances.
• Industrial Control Systems: Used in industrial control equipment to maintain stable and safe operation in environments with fluctuating power supplies.

Features

• High-Accuracy Voltage Detection: Precisely monitors the supply voltage with a defined threshold, ensuring accurate detection of undervoltage conditions.
• Low Current Consumption: Minimizes power consumption, making it suitable for battery-powered devices and energy-efficient applications.
• Open Drain Output: Provides a flexible output that can be easily interfaced with various logic circuits and microcontrollers.
• Compact Package: Available in a small package, making it suitable for space-constrained applications.
• Wide Operating Temperature Range: Operates reliably over a wide range of temperatures, ensuring stable performance in various environments.
• Hysteresis: Includes hysteresis to prevent oscillations near the threshold voltage, providing a stable and clean reset signal.

Benefits

• Improved System Reliability: Enhances system reliability by preventing malfunctions and ensuring controlled resets during undervoltage conditions.
• Data Integrity: Protects data stored in volatile memory from corruption by triggering a reset before the data can be compromised.
• Extended Battery Life: Low power consumption contributes to longer battery life in portable devices.
• Simplified Design: Easy integration into existing systems, simplifying the design process and reducing development time.
• Cost-Effective Solution: Provides a cost-effective way to monitor and protect electronic systems from voltage fluctuations.

Additional Details

The BD4849FVE requires an external pull-up resistor for the open-drain output. The threshold voltage is factory-set and precisely calibrated. The device is RoHS compliant.