BU4214FVE-TR

​The BU4214FVE-TR is a "supervisors for PMIC safety and system reset" integrated circuit that is widely used in portable electronic device applications. The device is a single-chip, low-voltage, low-power CMOS supervisor IC that detects power supply problems and generates a reset signal to ensure safe system operation. It is suitable for battery-powered systems, or other low-voltage systems, such as mobile phones, digital still cameras, PDAs, MP3 players and other personal digital devices.

The BU4214FVE-TR supervisor IC consists of three main functional blocks, including a power-on reset circuit, an undervoltage detection circuit (UVD), and a watchdog timer circuit. The power-on reset circuit generates a reset signal upon the initial power-up of the system and monitors the input voltage for a steady state. The undervoltage detection circuit monitors the system\'s operating voltage and generates a reset signal when the input voltage drops below a certain level. The watchdog timer circuit monitors the system\'s operation and generates a reset signal if the system does not respond in a timely manner.

The power-on reset circuit is designed to detect the application device\'s power-on status, and it will generate a reset signal when the power voltage is detected to be in threshold voltage level. This power-on reset signal is used to initialize the device\'s operating environment such as reset timers, counters and other resources. The undervoltage detection circuit continuously monitors the system\'s voltage level and will generate a reset signal when it drops below the threshold. This circuit can be used to detect a power failure or brownout and will reset the system to ensure its safety.

The watchdog timer circuit is designed to monitor the system\'s operation and will generate a reset signal if the system does not respond within a given time frame. This type of IC is often used in edge-sensitive applications such as security systems, medical equipment and process equipment, where the system needs to be quickly reset in the event of an emergency. The BU4214FVE-TR supervisor IC also has built-in diode temperature compensation and reverse polarity protection, which ensures its reliability in certain extreme conditions.

The BU4214FVE-TR is mainly used in portable, battery-powered systems. The IC can detect power supply problems in these systems and generate a reset signal, protecting the system from damage. It also provides a watchdog timer, which can detect system problems and generate a reset signal if the system does not respond within the given time frame. The reverse polarity protection and diode temperature compensation features ensure reliable operation in extreme conditions, making the BU4214FVE-TR a highly reliable system supervisor.