BU4239G-TR

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Introduction to BU4239G-TR

BU4239G-TR is a specialized miniature voltage supervisor designed to monitor supplies and reset microcontrollers, logic, or similar circuits. This device is part of the PMIC - Supervisors range, which is a term commonly used to describe integrated circuits that monitor multiple power supply rails or system conditions, or to alert in case of failure or other critical events. As a voltage supervisor, the BU4239G-TR provides easy monitoring of power supply rails, as well as reset circuit control and open drain output functions.

Application Fields

BU4239G-TR is primarily used in automotive systems such as input monitoring in car computers, dashboards, and onboard diagnostics, as well as reset circuits for microprocessors. This device is also suitable for a range of systems such as audio/video, industrial equipment, and smart TVs. Specifically, the BU4239G-TR can be used to monitor push buttons and other sources of input, providing a stable and accurate output during changes in temperature, pressure, voltage, and other related conditions.

Working Principle

The BU4239G-TR is composed of several components; its main component is a voltage regulator, which is responsible for maintaining the voltage within the predetermined limits. To operate, it needs an external reference voltage. The voltage regulator then compares the external reference voltage with the power supply rail and adjusts automatically the system power accordingly. In case the voltage exceeds the upper limit, the voltage regulator will switch it off, thus providing a reset signal.

The BU4239G-TR provides a low reset signal when the system voltage drops below the preset reset voltage. When the voltage reaches the normal operating value, the reset signal will be removed, enabling the system to continue operating. The BU4239G-TR also has an open drain output that is used to control external logic, such as reseting a microcontroller. This open drain output is active when the voltage is below the reset voltage. The BU4239G-TR also features an external capacitor that can be used to reduce the hysteresis between reset and normal operation, thus making the voltage regulation process more reliable.

Conclusion

BU4239G-TR voltage supervisor is part of the PMIC - Supervisors range, offering an integrated circuit that monitors multiple power supply rails or system conditions, or to alert in case of failure or other critical events. A wide variety of applications can benefit from the BU4239G-TR\'s capabilities, including automobile systems, industrial equipment, smart TVs and audio/video systems, to name a few. It is capable of continuously monitoring the supply voltage and resetting any systems when the voltage falls out of the predetermined limits. Furthermore, it also has an open drain output for further logic control.

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