The Rohm Semiconductor BD4849G is a reset IC, also known as a voltage detector or voltage supervisor. This integrated circuit is designed to monitor the power supply voltage in electronic devices and issue a reset signal to a microcontroller (MCU) or other digital logic when the voltage drops below a specified threshold. This prevents erratic behavior and data corruption caused by insufficient supply voltage.

Applications:

• Microcontroller reset circuits
• Power supply monitoring in embedded systems
• CPU and memory protection
• Automotive electronics
• Industrial control systems

Features:

• Detection voltage: 4.9V
• Low current consumption
• Open drain output
• Small package (SMT)
• High accuracy detection
• Wide operating temperature range

Benefits:

• Prevents system malfunctions caused by low voltage
• Ensures reliable system startup after power loss
• Reduces the risk of data corruption
• Simple to integrate into existing designs
• Extends battery life in portable devices
• Improves overall system stability and reliability

Additional Details:

The BD4849G features a detection voltage of 4.9V, making it suitable for monitoring 5V power rails. Its open-drain output requires an external pull-up resistor. The small surface-mount package facilitates compact board layouts. The datasheet provides detailed information on electrical characteristics, timing diagrams, and application circuits. It is crucial to select the appropriate reset IC with a detection voltage that matches the power supply requirements of the protected circuitry. The BD4849G provides a reliable and cost-effective solution for voltage monitoring and reset functionality.