The STM811S from STMicroelectronics is a compact, low-power microprocessor reset circuit designed to monitor the supply voltage in digital systems. It provides a highly reliable method of ensuring that a microprocessor (μP) boots up in the correct state after power-up or during a voltage drop. The STM811S is particularly suitable for battery-powered devices, where power conservation is a key requirement.

Key Features

• Precision Monitoring: The device offers precision monitoring of 3V, 3.3V, and 5V supply voltages, ensuring compatibility with a wide range of microprocessor and logic systems.
• Low Power Consumption: With its low supply current, the STM811S is optimized for use in power-sensitive applications, helping to extend battery life in portable devices.
• Manual Reset Input: The inclusion of a manual reset input allows for a reset to be triggered with an external push-button or logic signal, providing additional system control.
• Reset Timeout: It features an adjustable reset timeout period, which can be set by external components to match specific system requirements.
• High Immunity to False Resets: Designed to be immune to short duration voltage glitches on the VCC line, the STM811S minimizes the chance of false resets, enhancing system stability.
• Low Threshold Voltage Options: Available in several different threshold voltage options, the STM811S can be tailored to specific applications and voltage requirements.
• Operating Temperature Range: The device operates over a temperature range of -40°C to +85°C, making it suitable for industrial applications.

Applications

The STM811S is versatile and can be used in a variety of applications, such as:

• Portable/Battery-Powered Equipment
• Computers and Notebooks
• Embedded Systems
• Industrial Controllers
• Intelligent Instruments

Package and Availability

The STM811S is available in a 5-pin SOT23 package, which is suitable for space-constrained applications. It is widely available for purchase through STMicroelectronics’ distribution channels and is supported by the company's comprehensive technical documentation and application support.