Analog Devices ADM809JAKSZ-REEL7 Microprocessor Supervisory Circuit

The ADM809JAKSZ-REEL7 from Analog Devices Inc. is a highly reliable supervisory circuit that is designed to monitor power supplies in microprocessor systems. It provides a significant function in the management of system integrity by ensuring that the microprocessor is reset to a known state during power-up, power-down, and brownout conditions. This component is a crucial element for systems that require stable and reliable operation under various conditions.

This supervisory circuit operates by monitoring the VCC voltage of a microprocessor. When the monitored voltage drops below the factory-programmed threshold, the reset output is asserted, which remains asserted until the VCC voltage returns to an acceptable level and a timer has expired to ensure system stability. The reset timeout period is typically 140ms, providing adequate time for the microprocessor to initialize and stabilize after a reset event.

The ADM809JAKSZ-REEL7 comes in a compact SOT-23 package, which makes it an excellent choice for space-constrained applications. It is also available in tape and reel packaging (REEL7), which is suitable for automated manufacturing processes, ensuring efficient handling and placement during the production of electronic devices.

Key features of the ADM809JAKSZ-REEL7 include:

• Low power consumption, making it suitable for battery-operated systems.
• Precision monitoring of 3V, 3.3V, and 5V supply voltages.
• Active low reset output, which is guaranteed to be in the correct state for VCC down to 1V.
• Power supply transient immunity, ensuring reliable operation during fluctuations.
• Automatic reset signal generation during power-up and power-down.
• Temperature range from -40°C to +85°C, allowing for use in various environments.

This product is designed for a wide range of applications, including computers, controllers, intelligent instruments, portable/battery-powered equipment, and other microprocessor or microcontroller-based systems. Its purpose is to improve the reliability and robustness of these systems by providing an effective reset mechanism during critical power events.

Overall, the ADM809JAKSZ-REEL7 is a testament to Analog Devices Inc.'s commitment to quality and reliability, offering an essential component for safeguarding system integrity across a multitude of electronic applications.