MAX6865UK38D6S+T

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Power Management IC (PMIC) is a major category of integrated circuits (ICs) used in the design of electronic and embedded systems hardware. Over the last decades, PMIC has become an indispensable part of all electronic devices, ranging from basic remote controls and portable digital electronic devices to the most sophisticated machines and communication systems. Nonetheless, it is not easy to find and select a suitable type of PMIC, especially for those unfamiliar with the whole PMIC product range and with no prior experience in electronic or embedded systems design. Supervisors, as one of the classes of PMICs, are responsible for keeping the power source in check and within the range of acceptable voltage and current levels as required by the system. In this article, we review the MAX6865UK38D6S+T application field and working principle, which is presently one of the most widely used supervisors in the global electronics industry.

The MAX6865UK38D6S+T is a single-channel supervisor PMIC which provides power-on reset (POR) and power-fail reset (PFR) monitoring for a variety of systems. Specifically, this PMIC is widely deployed in microcontroller (MCU) applications, including personal computers (PCs), set-top boxes, instrumentation and smart home products, as well as automotive systems. It has several advanced functions, such as wide input voltage sensing range, adjustable reset threshold and watchdog timer, reset noise immunization, and adjustable reset timeout delay. Most notably, the MAX6865UK38D6S+T\'s high POR threshold and low PFR threshold make it a preferred choice for those power designs that require a wide operational voltage range.

The MAX6865UK38D6S+T is designed to monitor power in a wide range of applications, with a typical POR threshold of 3.2V to 6.3V and a PFR threshold of 1.3V to 2.3V. This PMIC can detect both rising and falling edges of the input voltage, providing advanced reset functionality and ensuring system operation between 1.2V and 6.3V. In addition, the MAX6865UK38D6S+T is equipped with a number of external circuitry elements, such as a serpentine resistor for reset timeout, a diode for reset noise immunization, and a parallel capacitor for low-hammering noise immunity, providing robustness and improved reliability for a wide range of power system designs.

When the input voltage drops to the PFR threshold, the MAX6865UK38D6S+T triggers the PFR event, and keeps the system in reset until the voltage recovers to the POR threshold. Additionally, this PMIC is equipped with a window watchdog timer, which enables the system to restart after reaching the reset window threshold. This feature helps guarantee that the system can quickly self-correct errors or issues, so that it can continue to operate properly even after experiencing voltage drops or power outages.

In conclusion, the MAX6865UK38D6S+T is a popular PMIC choice for applications involving microcontroller circuits. It provides superior performance, wide input voltage sensing range, adjustable reset thresholds and watchdog timer, as well as reset noise immunization and adjustable reset timeout delay. The high POR threshold and low PFR threshold also make it suitable for applications involving a wide operational voltage range. With its robust and reliable design, the MAX6865UK38D6S+T is sure to help you achieve optimal performance in all of your microcontroller system designs.

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