MAX6323DUT29+T

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The MAX6323DUT29+T is a dual reset manager and supervisor with both push-pull active-low reset output and open-drain active-low reset output. It isSpecifically designed for microprocessors and programmable logic controllers (PLCs) that require morethan one supply rail to safeguard power supply systems and protect devices when detecting powerlosses or other fault conditions.

The MAX6323DUT29+T is part of a family of integrated power management and supervisor circuitsthat provides higher levels of system reliability. This particular supervisor device offers an integrated,versatile, and accurate power-on reset (POR) circuit. It also provides an integrated watchdog timerfunction to reset the system if it is not responding normally. Additionally, it provides a manual resetinput, adjustable reset thresholds, and an open-drain active-low output that can be connected toperipheral logic circuits. The device has a low operating current and is capable of providingmultiple reset outputs, allowing systems with multiple power supply rails to be reset individually.

Features

• Push-pull active-low reset and open-drain active-low reset output
• Manual reset input
• Adjustable reset thresholds
• Low power reset control
• Multiple reset outputs
• Watchdog timer

Application Field

The MAX6323DUT29+T is ideal for applications such as power-on reset (POR) and power-down resetschemes. The device is well-suited to providing reliable and high-speed reset control in systems withmultiple power supplies and/or multiple microprocessors. It can be used in conjunction with supplymonitoring ICs or other hardware-level reset circuits to provide complete system reset protection. Thisdevice is also ideally suited for applications such as programmable logic controllers (PLCs) andautomatic test equipment (ATE), where precise reset control is needed.

Working Principle

The MAX6323DUT29+T incorporates an integrated POR circuit and an adjustablethreshold-comparator circuit to detect out-of-band conditions. It also has an integrated watchdog timerthat can be enabled/disabled by logic levels. The watchdog timer can either reset the system if there isno correct response in a certain amount of time or reset the system if it receives an incorrect response.The output of the device can either be push-pull active-low (directly connected to the reset line of themicroprocessor/PLC) or open-drain active-low (connected in series to other reset lines).

The POR circuit monitors the power supply rails and ensures that the voltage remainswithin the preset limits. If the voltage exceeds an adjustable reset threshold, the device will generate areset signal to reset the microprocessor/PLC. The reset signal remains active until the voltage dropsbelow an adjustable reset threshold. The reset threshold levels can be adjusted to accommodate varioustrigger levels and reset delays. Additionally, the device can be used with manual reset inputs, allowingthe system to be reset under certain conditions.

Overall, the MAX6323DUT29+T is a reliable and robust power reset supervisor device that can be usedto protect systems with multiple power supplies or multiple microprocessors. Its adjustable thresholdand reset delay settings, along with its integrated watchdog timer, provide a comprehensive level ofprotection to ensure that systems are running within safe parameters and resetting when needed.

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