The BD4847G is a voltage detector IC manufactured by Rohm Semiconductor, designed to monitor the supply voltage and generate a reset signal when the voltage drops below a specified threshold. This function is critical for maintaining stable operation in microcontroller-based systems and other electronic devices. By ensuring a proper reset during undervoltage conditions, the BD4847G helps prevent data corruption and system malfunctions.

Applications

• Microcontroller Reset: Provides a reliable reset signal to microcontrollers during power-up, power-down, or brownout conditions, ensuring proper initialization and execution.
• Data Protection in Memory: Safeguards data stored in volatile memory by triggering a reset when the supply voltage falls below a critical level, preventing data loss or corruption.
• Power Management Systems: Monitors voltage levels in power management circuits and initiates corrective actions or shutdown procedures when necessary to maintain system integrity.
• Automotive Applications: Ensures the reliable operation of electronic systems in automotive environments, where voltage fluctuations can occur due to various factors.
• Industrial Control: Used in industrial control systems to protect sensitive components and maintain stable operation in the face of power supply variations.

Features

• High-Accuracy Voltage Detection: Precisely monitors the supply voltage and provides a reliable reset signal when the voltage drops below the specified threshold.
• Low Current Consumption: Operates with minimal 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.
• Small Package Size: Available in a compact package, allowing for use in space-constrained applications.
• Wide Operating Temperature Range: Designed to operate reliably over a wide range of ambient temperatures.
• Built-in Hysteresis: Includes hysteresis to prevent oscillations near the threshold voltage, ensuring a stable reset signal.

Benefits

• Improved System Reliability: Enhances overall system reliability by preventing malfunctions caused by undervoltage conditions.
• Data Integrity Protection: Safeguards valuable data by ensuring a proper reset before data corruption can occur.
• Extended Battery Life: Low power consumption contributes to longer battery life in portable devices.
• Simplified Circuit 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 BD4847G requires an external pull-up resistor for the open-drain output. The reset threshold voltage is precisely calibrated during manufacturing. This device is also RoHS compliant, making it environmentally friendly.