MAX6867UK20D3S+T

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Power management integrated circuits (PMICs) are one of the most important components of a modern system. These devices help to manage the power supply and provide a reliable power supply to other system components. Supervisors are an important class of PMICs, responsible for system reset and power-down protection. In this article, we will discuss the application field and working principle of MAX6867UK20D3S+T, a supervisor from Maxim Integrated.

MAX6867UK20D3S+T Overview

The MAX6867UK20D3S+T is a reset and supervisor IC from Maxim Integrated in 3mm x 3mm chip scale package. It is designed for microcontroller-based systems and provides a reset, power-on reset (POR), watchdog timer (WDT), power-fail comparator (PFC), and supply voltage monitoring functions. It is a high-accuracy reset IC, with a voltage monitor accuracy of ±1%, and a fixed-delay reset validity time of 150ms. It also features a power-supply canny that tracks the voltage of a power rail and ensures proper system initialization on power-on. The MAX6867UK20D3S+T can be easily integrated into any system, providing reliable reset and power-fail protection even under challenging conditions.

MAX6867UK20D3S+T Application Field

The MAX6867UK20D3S+T provides versatile protection features and is suitable for a wide range of applications. It is especially well-suited for microprocessor-based systems that require high performance and reliability. It is ideal for applications such as mobile phones and tablets, industrial, robotics, automotive systems, home appliances, and more. The MAX6867UK20D3S+T is also suitable for use in arduous environments, such as those that involve high levels of shock and vibration.

MAX6867UK20D3S+T Working Principle

The MAX6867UK20D3S+T monitors the power supply of a system and provides reliable reset and power-fail protection in case of failure or low-voltage conditions. The device features a push-pull reset output and an open-drain WDT output. The reset output is triggered when the power supply voltage drops below a threshold or when the WDT timer period expires. The reset out remains asserted until the power supply voltage is above the specified threshold, at which point the reset out is deasserted. The WDT is an active-low, open-drain device that is triggered when the WDT timer period expires. It will remain asserted until cleared or reset.

The MAX6867UK20D3S+T also features a power-fail comparator that monitors the supply voltage and triggers a reset when the supply voltage drops below a set threshold. It also has an adjustable reset valid time, allowing the reset output to remain active for a specific period of time. This prevents reset timeout conditions, allowing the reset output to remain active for longer periods of time if necessary. Other features include an optional selectable external reset source, a selectable polarity reset output, and optional active-low and active-high reset outputs.

The MAX6867UK20D3S+T is a versatile reset and supervisor IC that can be easily integrated into any system. It provides reliable reset and power-fail protection even under challenging conditions, making it an ideal choice for microprocessor-based applications that require high performance and reliability.

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