MAX6385XS26D3-T

The MAX6385XS26D3-T is a low-power, microprocessor supervisor featuring an active-high manual reset and watchdog timer output. As part of a power management integrated circuit (PMIC), it can provide reliable protection for microcontroller-based circuits that require immediate response to system reset conditions, as well as extended time for operating systems with power failure. Supervisors can also be used to provide levels of control to automated alarm systems and provide improved system reliability from event detection.

The MAX6385XS26D3-T application field is mainly in power supply supervision and power-fail detection, along with long-term reliability, self-resetting, and often very low in terms of power consumption. It integrates a reset controller, watchdog timer, and power-fail circuit that monitors the system\'s power supply voltage to detect power failures, such as overvoltage, undervoltage, or brownout conditions.

The supervisor begins monitoring the system\'s power supply by comparing its input voltage against the user-set threshold voltage level (VTH). When power reaches or exceeds this threshold level, the reset controller activates and reset logic is asserted, thereby resetting the system. When this monitored voltage drops for a sufficiently long period of time, the watchdog timer (WDT) will alternatively assert reset logic, independent of the manual reset. This dual reset source provides a reliable solution for the stable monitoring of system power levels.

The MAX6385XS26D3-T working principle is based on the voltage monitoring device (VMO) which is located in the integrated circuit. The VMO senses the system\'s power supply voltage and compares this voltage to a user-set threshold voltage. When the upper or lower VME voltage is out of range, the VMO will sense this and the reset logic of the reset controller will be activated. The reset logic results in a reset of the system. When the power supply voltage is within the VME range the WDT is enabled, providing an independent reset source in case of a system hang-up.

The reset delay time is adjustable via two external capacitors, allowing the user to adjust the delay time to suit specific application requirements. Reset is released when power supply voltage exceeds the VME rising voltage and returns to staying within the VME window with a delay, determined by the value of external capacitors. The reset delay time is also adjustable via a dedicated pin, allowing the user to adjust the delay time to suit specific application requirements.

The MAX6385XS26D3-T is an ideal solution for various applications such as automotive, medical devices, industrial control, HVAC, and telecom systems. With its integrated features, reset controller, watchdog timer, and power-fail circuit, it provides excellent protection for microcontroller-based systems and provides enhanced system reliability from event detection.