The STM809T is a sophisticated microprocessor reset circuit device developed by STMicroelectronics, a leader in the semiconductor industry. This compact and efficient component is designed to monitor the supply voltage of microprocessor (µP) systems, providing a reliable reset signal to the µP during power-up, power-down, and brown-out conditions. The STM809T ensures that the µP resets in a predictable manner, a critical feature for maintaining system integrity and preventing data corruption.

Key Features

• Precision Monitoring: The STM809T offers precise monitoring of the 3.0V, 3.3V, and 5.0V power supplies, catering to a wide range of µP and logic systems.
• Low Power Consumption: This device is highly energy-efficient, making it ideal for portable and low-power applications.
• Automatic Reset: It generates a reset pulse when the monitored power supply drops below the factory-programmed reset threshold voltage.
• Reset Time Delay: The reset output is maintained active for a minimum of 140ms after the supply voltage has risen above the reset threshold level, ensuring system stability.
• High Accuracy: The reset threshold voltage is accurate to ±1.5% at 25°C, providing reliable operation under varying conditions.
• Low Standby Current: The typical standby current is as low as 3µA, which is beneficial for battery-operated devices.
• Operating Temperature Range: The device is operational over a temperature range of -40°C to +85°C, suitable for industrial applications.

Applications

The STM809T is versatile and can be employed in a multitude of applications, including:

• Computers and Computer Peripherals
• Embedded Systems
• Battery-Powered Equipment
• Industrial Systems
• Consumer Electronics

Package and Availability

The STM809T is available in a compact SOT-23 package, which is suitable for space-constrained applications. Its small footprint and low profile make it an excellent choice for modern, compact electronic assemblies. STMicroelectronics ensures availability and support for the STM809T, providing comprehensive technical documentation and application assistance.