MAX6314US29D3+T Integrated Circuits (ICs)

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The MAX6314US29D3+T is a PMIC (power management integrated circuit) Supervisor that provides open drain power-on reset, watchdog timer (WDT) circuitry, and an active-low reset outputs optimized for various microprocessor (µP)-based systems. It is a simple, cost-effective solution for host microprocessor and peripheral reset in battery-powered and other space-limited and low-voltage applications.

Application Field

The MAX6314US29D3+T is designed for applications such as cellphones and portable entertainment systems, microcontrollers, and any other systems that rely on a supervisor to protect their core functions. Due to its tight power and voltage requirements, it can be used in a wide variety of applications, including those that involve extreme temperatures, vibrations, or dust environments.

Features

One of the main features of the MAX6314US29D3+T is its large practical operating supply voltage range. The device can be used in systems with a voltage as low as 1.2V and as high as 5.5 V thanks to its integrated boost diode pullup. The device also integrates two adjustable voltage supervisors for applications that require two reset thresholds or dual, stage power-on reset (POR) systems. Reset and WDT can be deferred with a 100uV hysteresis clamp, active-low output, or power-fail comparator, providing the system with an additional layer of protection. In addition, the MAX6314US29D3+T also features watchdog timer pulse widths through an operating temperature range of -40°C to +125°C.

Working Principle

The MAX6314US29D3+T works using several different components: a reset timer, a watchdog timer, a reset output, and the output pulse width feature. The reset timer is responsible for keeping track of the time since the last system reset. When the timer reaches a pre-programmed time limit, a reset signal is triggered and pulls the active-low reset output (RESET) low, indicating to the µP that it needs to be reset. The watchdog timer is used to detect any instances of “present” or “stuck” operations in the µP. When enabled, the WDT will periodically test the watchdog input from the µP and if it does not receive a response, the WDT will trigger the RESET pin. The MAX6314US29D3+T also features a pulse width feature which provides a minimum configurable amount of time for the RESET pin to remain held low. This provides the µP with the time it needs to properly reset, preventing any possible data loss.

Conclusion

The MAX6314US29D3+T is an effective PMIC (power management integrated circuit) supervisor that is optimized to provide reliable reset protection for various µP-based systems. Its wide voltage range and versatile design makes it suitable for a wide range of applications, from cellphones to embedded systems. Its variety of components, including a reset timer, watchdog timer, and an active-low reset output make it simple to integrate into an existing system.

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