MAX809MTR

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Power supervisors are essential components in embedded systems and microcontrollers, offering system protection and monitoring against unwanted conditions. MAX809MTR is an advanced reset circuit primarily used for monitoring and protecting controllable voltages within microcontroller-equipped systems. Ideal for applications such as data loggers, computers, gaming systems, and industrial controllers, the MAX809MTR offers superior system reliability and protection from harmful voltage events.

Overview of the MAX809MTR

The MAX809MTR is a small, single-chip reset circuit that offers a wide range of supervised input voltages and requires minimal external components, offering a comprehensive and cost-effective solution for microcontroller-based systems. The MAX809MTR features two independent inputs – an internal band gap reference, and a voltageSense comparator – along with an open-collector reset output. The voltage supervisor is designed to monitor and protect against dangerous variations in the supply voltage, safely resetting the system when required.

Features and Benefits of the MAX809MTR

• Wide Voltage Range – The MAX809MTR offers a wide input voltage range, from +4V to +44V, with a precision accuracy of +0.5V± 0.1%.
• Low Power Consumption – The MAX809MTR offers low-power operation, at just 100 microamps. This allows for reduced power consumption and improved system reliability.
• Wide Operating Temperature Range – The MAX809MTR can operate at temperatures ranging from -40°C to +85°C.
• Robust Reset System – The MAX809MTR features an open-collector reset output and an adjustable delay to ensure proper reset operation.
• Compact Form Factor – The MAX809MTR has a minimum footprint, making it ideal for space-constrained applications.

Application Field of the MAX809MTR

The MAX809MTR is ideal for applications such as automotive systems, industrial controllers, and data loggers, offering superior system reliability and safety. It can be used in a variety of systems, from computers and gaming systems to medical devices and robotics systems. The MAX809MTR’s wide input voltage range allows it to be used in systems with a variety of power supplies, from AC and DC sources to batteries.

Working Principle of the MAX809MTR

The MAX809MTR is a reset circuit with two independent inputs. The internal voltage reference monitors microcontroller-supplied power, while the voltageSense comparator monitors the system supply voltage. The two signals are combined in an error amplifier. When the monitored supply voltage drops too low or rises too high, the error amplifier triggers a RESET signal. The RESET signal is sent to the supervisor, which then triggers an open-collector RESET active-low output signal. The delayed reset signal is then sent to the microcontroller, which resets the system. The supervisor can also be used to generate an interrupt signal to indicate when the monitored voltage is out of tolerance.

Conclusion

The MAX809MTR is an advanced reset circuit for protecting microcontroller-equipped systems from dangerous voltage variations. Its wide input voltage range and low power operation make it suitable for a variety of applications. The MAX809MTR’s dual-input system, adjustable delay and open-collector reset output ensure reliable operation and superior system safety in the event of a voltage event.

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