MAX6423US33+T

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MAX6423US33+T is an integrated circuit (IC) supervisor designed to protect against anomalous input voltage levels, brown-outs, over-voltage, and reverse input voltage on a single or multi-input power supply. It is most commonly used in automotive, industrial, and consumer applications.

The MAX6423US33+T features an adjustable supply voltage supervisory circuit, which checks the voltage of the input supply during power up and power down events. When triggered, the supervisor asserts a reset signal to the protected circuitry. The reset assertion time (tRST) can be programmed by a capacitor connected to the supervisor, and the internal reference voltage for the reset threshold is adjustable using an external resistor divider. The supervisor also provides an open-drain mandown output, which is asserted if the supply voltage is below the reset threshold for a programmed amount of time.

The MAX6423US33+T also provides a watchdog timer circuit that can be used for system reset with manual and automatic reset assertion modes. The watchdog timer brings the reset output low after the programmed timeout period if the watchdog is not actively reset. The MAX6423US33+T also includes a low-voltage detect input, which is asserted when the voltage on the VCC pin drops below the user-programmable threshold.

The MAX6423US33+T is designed to operate with a power supply voltage range of 2.3V to 5.5V and temperature range of -40°C to 125°C. It is offered in a small 3mm × 3mm QFN (quad flat no-leads) package, making it suitable for applications with size and power constraints.

The MAX6423US33+T can be used to monitor a single input power supply or monitor multiple supplies with a single supervisor. Its adjustable reset threshold, watchdog timer, and open-drain mandown output make it suitable for a wide range of applications, including automotive, industrial, and consumer. It also offers superior system protection and higher reliability compared to traditional voltage monitoring solutions.

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