The STM809RWX7F from STMicroelectronics is a highly reliable, precision microprocessor (μP) reset circuit device that plays a critical role in managing the power supply and system reset functions in microprocessor and microcontroller-based systems. Its primary function is to monitor the system voltage and provide a reset signal to the host μP during power-up, power-down, and brown-out conditions, ensuring the proper operation of the system.

Key Features

• Precision Monitoring: The STM809RWX7F offers precise monitoring of the 3V power supply (V<sub>CC) with a threshold voltage of 2.93V, ensuring accurate detection of under-voltage conditions.
• Low Power Consumption: Designed for power-sensitive applications, it consumes minimal power, which is critical for battery-operated devices.
• Reset Time Delay: It features an internally fixed delay time of 140ms (minimum), providing a reliable reset signal to the μP upon detection of a voltage fault.
• High Accuracy: The device offers high accuracy in monitoring the reset function, which is essential for the proper initialization of the system during power-up.
• Operating Temperature Range: The STM809RWX7F operates over an industrial temperature range from -40°C to +85°C, making it suitable for a wide range of applications.
• Compact Package: Available in a small SOT-23 package, it is ideal for space-constrained applications.

Applications

The versatility of the STM809RWX7F makes it an excellent choice for a variety of applications, including:

• Computers and computer peripherals
• Embedded systems
• Portable and battery-powered equipment
• Intelligent instruments
• Industrial controllers

Conclusion

With its precise voltage monitoring capabilities, low power consumption, and compact design, the STM809RWX7F from STMicroelectronics is an indispensable component for systems that require reliable reset functions. Its robust design and wide operating temperature range make it a go-to solution for designers looking to enhance system reliability in various challenging environments.