LTC691IN Microprocessor Supervisory Circuit

The LTC691IN from Linear Technology is a sophisticated microprocessor supervisory circuit that has been meticulously engineered to enhance the reliability and stability of microprocessor systems. This robust component ensures that your microprocessor is fully operational by monitoring the power supply and providing essential control functions during power-up, power-down, and brownout conditions.

Key Features:

• Power Monitoring: The LTC691IN vigilantly monitors the power supply voltage, guaranteeing that it remains within acceptable thresholds for the microprocessor to function correctly. It provides an active low reset output that is guaranteed to be in the correct state for V<sub>CC down to 1V.
• Reset Time Delay: The device features an adjustable reset timeout period, which can be set by an external capacitor. This ensures that the microprocessor has sufficient time to initialize correctly before it begins to execute code.
• Watchdog Timer: A built-in watchdog timer serves as a fail-safe feature, requiring periodic servicing by the microprocessor within a selectable time frame. If the microprocessor fails to reset the watchdog timer, the LTC691IN will issue a system reset, thereby preventing system hang-ups and malfunctions.
• Backup Battery Switchover: In the event of a power failure, the LTC691IN automatically switches to a backup battery to maintain volatile memory. This seamless transition ensures that data is not lost during power interruptions.
• Low Power Consumption: The LTC691IN is designed for energy efficiency, with a typical supply current of only 15μA, making it an ideal choice for power-sensitive applications.

Applications:

The LTC691IN is versatile and can be employed in a wide range of applications that require reliable microprocessor control. These include:

• Microprocessor systems
• Computers and controllers
• Intelligent instruments
• Portable/battery-powered equipment

With its robust feature set, the LTC691IN provides the essential functions needed to enhance the performance and reliability of microprocessor systems, making it a valuable component for designers and engineers looking to create stable and resilient electronic products.