STM1816RWX7F

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PMIC – Supervisors are power management semiconductor devices that interface with mechanical (real-world) systems and digital (electronic) systems, providing an effective and efficient way to electrically control and manage the power of an electronic system. STMicroelectronics STM1816RWX7F is a supervisor circuit for 1-channel power supply monitoring. It is designed for any application that requires power supply supervision and power on reset functions. This supervisor operates from -40°C to 85°C, making it suitable for many applications, such as HVAC systems, medical equipment, automotive, robotic systems and unmanned systems.

The STM1816RWX7F is a low-power CMOS supply-voltage supervisor integrated circuit. It features a push button reset circuit, reset filter capacitor and an external reset sequential mechanism. It is a voltage-detection circuit that monitors the power supply voltage. It also acts as a reset generator for any microcontroller or SoC when the power supply voltage is either lower than the set voltage or higher than the set voltage. The reset voltage range is from 0.8V to 5V. It also comes with an open drain push button reset circuit and an external reset accuracy of 4%.

The STM1816RWX7F voltage-detection supervisor works by constantly comparing the input voltage with the voltage reference on the reset pin and outputting a logic level reset pulse once the input voltage is either lower or higher than the set voltage threshold. The STM1816RWX7F has an adjustable reset threshold voltage, which is set by a single external resistor at the RESET pin. An internal comparator monitors the reset pin and generates a reset pulse when the voltage at the reset pin falls below or exceeds the reset threshold.

The STM1816RWX7F is equipped with reset filter capacitor to filter out voltage transients and prevent false resets which can be caused by minor voltage flickers and spikes. The reset filter capacitor of the STM1816RWX7F must be connected from the reset pin to ground and must have a value of at least 10nF. The external resistor at the reset pin should have an accurate value within 10%, to ensure correct operation of the supervisor.

The STM1816RWX7F supervisor circuit also features an open-drain push-button reset circuit with an active-low reset output. This circuit is mainly used for manual resetting of microcontrollers and other digital systems. It has an internal pull up resistor and an adjustment pin, which can be used to set the time delay between the moment the button is pushed and when the reset pulse is generated. This time delay can range from 150ms to 2.25s.

The STM1816RWX7F can be used in any application that requires power supply supervision and power on reset functions. Its adjustable reset threshold and open-drain push-button reset circuit makes it an ideal solution for a wide range of applications, such as HVAC systems, automotive, industrial equipment, medical equipment, robotic systems and unmanned systems.

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