The BU4917F-TR is a highly reliable voltage detector IC manufactured by Rohm Semiconductor. It is specifically designed to monitor power supply voltages and generate reset signals to microcontrollers and other digital systems in the event of a voltage drop. This functionality is crucial for preventing data corruption and ensuring stable system operation, especially in environments where power fluctuations are common. The “-TR” suffix typically indicates a tape and reel packaging for automated assembly.

Applications

• Microcontroller reset circuits
• Power supply voltage monitoring
• Battery-powered device voltage supervision
• Industrial control systems
• Automotive electronics

Features

• High-accuracy detection voltage: Provides precise voltage monitoring for reliable reset generation.
• Low current consumption: Minimizes power drain on the system, especially important in battery-powered applications.
• Open drain output: Allows for flexible connection to various logic levels and external circuitry.
• Small surface mount package: Facilitates compact design and efficient PCB layout.
• Wide operating temperature range: Ensures reliable performance in a variety of operating environments.

Benefits

• Protects against data corruption: By generating a reset signal during voltage drops, it prevents microcontrollers from operating with insufficient power.
• Enhances system stability: Reliable voltage monitoring contributes to overall system stability and prevents unexpected behavior.
• Prolongs battery life: Low current consumption is beneficial in battery-powered devices, extending their operational lifespan.
• Simplifies circuit design: Easy integration into existing systems with minimal external components.
• Suitable for automotive applications: Designed to withstand the harsh conditions and voltage fluctuations common in automotive environments.

Additional Details

The BU4917F-TR offers a precise detection voltage threshold, which is crucial for accurate voltage monitoring. The open drain output configuration allows for flexibility in interfacing with different microcontrollers and logic circuits. The small surface mount package (often SOT-25 or similar) enables compact and efficient board layouts. The device operates over a wide temperature range, typically -40°C to +85°C, making it suitable for industrial and automotive applications. The tape and reel packaging facilitates high-volume automated assembly, reducing manufacturing costs and improving production efficiency. An external pull-up resistor is required for the open drain output to function correctly.