STM811SW16F

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STM811SW16F is a supervisor integrated circuit (IC) manufactured by STMicroelectronics. It is a highly integrated device with a variety of functions for monitoring power supplies and providing power-on reset and Watchdog Timer (WDT) functions. This device has been designed for monitoring the power supply rails in a wide range of applications, from mobile and consumer electronics to industrial systems. This article will discuss the application field and working principle of STM811SW16F.

Application Field

STM811SW16F is a highly integrated power supervisor and reset/watchdog timer designed for use in various electronic devices. It can be used to provide power-on reset and watchdog timer functions in desktop PCs, notebooks, LCDs, gaming consoles, automotive electronics and other consumer electronics. It is also suitable for industrial applications, where it can provide overvoltage and undervoltage protection.

STM811SW16F has a wide operating temperature range of -40°C to +105°C. The low power consumption and minimal form factor make it suitable for battery-powered applications. Moreover, its high integration and low pin count simplify the design and reduce board space.

Working Principle

STM811SW16F is a supervisor IC that is specifically designed to monitor the power supply rails in various electronic systems. It integrates both a power-on reset (POR) and watchdog timer (WDT) system on a single chip. The user can set the POR threshold voltage and the WDT timeout period via two external resistors.

The POR circuit provides digital feedback when the power supply voltage goes outside the preset range. This helps to ensure that the digital system is reset to its initial state if the power supply voltage drops below the preset threshold level. The watchdog timer system monitors the activity of the system and creates a reset signal if the activity stops for longer than the preset watchdog timeout period.

In addition, STM811SW16F also features a frequency compensation mechanism and a process monitor that provides a power-good signal once the voltage levels have stabilized. This helps to prevent accidental resets caused by slowly changing power supply levels. There is also an I/O pin that can be used for external reset or system control purposes.

STM811SW16F provides an effective solution for monitoring power supply rails in a wide range of applications. Its wide operating temperature range, low power consumption and minimal form factor make it an ideal solution for battery-powered applications. Its high integration and low pin count reduce board space and simplify the design.

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