MAX6389XS31D2+T

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Supervisors are integrated circuits that provide electronic signals for system reset and monitored voltages for safe operation in power management applications. The MAX6389XS31D2+T is an active-low and active-high system reset supervisor from Maxim Integrated, and is designed for use in a variety of system reset applications.

The MAX6389XS31D2+T Supervisor is a versatile, low-power, dual-channel power-on reset (POR) supervisor device with a single voltage monitor. It features an active-high, active-low reset signal, improving system reliability by eliminating the need for a series resistor to hold the reset open. The lowpower design of the MAX6389XS31D2+T maked it ideal for power-managed, portabledevices and other mobile applications. The MAX6389XS31D2+T also features a power-on reset function that provides a reliable single-channel active-high system reset with an adjustable reset timeout period.

The MAX6389XS31D2+T has several applications, including system reset, power sequencing, and power-good monitoring. In applications where board space is at a premium, the dualchannel feature of the MAX6389XS31D2+T allows the use of two circuits instead of the more conventional one-channel design. This maximizes the board space in compact systems. The MAX6389XS31D2+T also features a power-on reset (POR) timeout circuit that delays a minimum of 4 milliseconds before resetting the system. This prevents false resets due to noise transients or power glitches.

The operation of the MAX6389XS31D2+T is dependent on its operating voltage, which is typically 2.7V to 5.5V, with an operating temperature of -40°C to +85°C. Though it operates at 1.8V, the absolute maximum ratings increase the lower the operating voltage falls. The reset output remains active until the VCC voltage rises above the reset threshold voltage, which is adjustable between 1.2V and 5.5V. In addition, the POR timeout period, which is adjustable between 4 ms and 630 ms, causes the reset output to become active after the POR timeout period has elapsed. If the reference voltage is above 1.2V (VREF/RST), the reset output goes active. If the reference voltage is below 1.2V (VREF/RST), the reset output is inactive and the system is reset.

The MAX6389XS31D2+T can be used in a variety of applications such as system protection, reset circuits, and power-on reset circuits. It has a wide operating temperature range of -40°C to +85°C, and its low power consumption makes it ideal for portable and power management applications. The dual-channel construction maximizes board space in compact systems, and the adjustable POR timeouts and adjustable reset thresholds provides superior system protection.

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