MAX6345SUT+T

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In fields of electronic engineering and power management, supervisory circuits are key components. Supervisory family products such as MAX6345SUT+T provide a variety of functions for ensuring system information safety, reset protection and functional correctness during power on or power off. In this article, an in-depth discussion on the application field and working principle of MAX6345SUT+T is presented.

1. Overview

The MAX6345SUT+T supervisor IC provides several new features to optimize the supervisory power on reset (Power-on Reset, POR) and controller automatic reset (Controller Automatic Reset, CAR) functions. This IC integrates different types of reset signals, which can enhance the safety protection of the system. It is suitable for use in various embedded systems, including aerospace systems, instrumentation and medical equipment, building automation and industrial control systems.

2. Application Field

The MAX6345SUT+T supervisor IC is mainly used in the embedded systems mentioned above. It provides high precision, wide temperature operating range (−55℃ to 150℃) and an overvoltage protection reset for these embedded systems. Moreover, it also provides maximum one shot POR/CAR delay time (TBV) as adjustable, ranging from 62ms to 8s. The adjustable delay time can prevent system from unexpected delayed resetting. Additionally, it has a built-in 2.5V precision voltage supervisor and a selectable 5 V or 3.3 V POR supply voltage, making it can be used in various embedded systems where the POR supply voltage and fixed voltage rails usually have a difference.

3. Features

The MAX6345SUT+T supervisor IC has a variety of features which can enhance the safety protection performance of the embedded systems. Firstly, it has an integrated watchdog timer, which can detect if the microcontroller (MCU) ever fails to service its timers. Secondly, it also features a low reset threshold of 1.375V, which can detect low voltage conditions. Thirdly, it has an adjustable overvoltage protection (OVT) reset circuit, which can detect an excessive overvoltage condition. Fourthly, it has an adjustable-delay two-wire serial bus reset generator (reset 3 or reset 4) to meets various reset requirements. Lastly, it has a built-in temperature shutdown circuit, which can provide thermal protection to the embedded system.

4. Working Principle

The MAX6345SUT+T supervisor IC works in three main modes, which are power on and self-restart mode, POR-only mode and extended delay mode. First of all, power on and self-restart mode will automatically reset after a short delay in case of microcontroller failure. Secondly, POR-only mode will reset as soon as power is supplied to the system. Lastly, extended delay mode will reset according to the selected delay time. All three modes can also be reset by an external trigger signal. The overvoltage protection reset and temperature shutdown protection are always working in the background, ready to react in case of any abnormal voltage or excessive temperature.

Conclusion

The MAX6345SUT+T supervisor IC provides various reset signals and safety functions for embedded systems. With its wide temperature operating range, adjustable delay time and overvoltage protection reset, the IC ensures system information safety, reset protection and functional correctness during power on or power off. In conclusion, the MAX6345SUT+T supervisor IC is a helpful and versatile power management component.

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