The IMP811T is a microprocessor supervisory circuit manufactured by IMP (now Diodes Incorporated). It is designed to monitor the power supply voltage of a microprocessor and generate a reset signal when the voltage falls below a certain threshold, preventing erratic behavior and data corruption.

Applications

• Microprocessor-based systems
• Embedded systems
• Industrial control systems
• Automotive electronics
• Power monitoring applications

Features

• Precision voltage monitoring: Accurately monitors the power supply voltage.
• Reset output: Generates an active-low reset signal when the voltage falls below the threshold.
• Watchdog timer: Includes a watchdog timer to detect and reset runaway microprocessors.
• Manual reset input: Allows for external reset of the microprocessor.
• Small package size: Available in compact packages for space-constrained applications.
• Low power consumption: Operates with low power consumption.

Benefits

• Prevents data corruption: Protects data from corruption due to power supply fluctuations.
• Ensures reliable operation: Guarantees proper microprocessor operation.
• Simplifies system design: Reduces the need for external reset circuitry.
• Improves system reliability: Enhances the overall reliability of the system.
• Protects against software errors: The watchdog timer resets the microprocessor if it becomes stuck in a loop.

Additional Details

The IMP811T has a pre-determined voltage threshold. The reset signal remains asserted for a specified time period after the voltage rises above the threshold. Refer to the Diodes Incorporated datasheet for complete details including reset threshold voltage, reset timeout period, watchdog timeout period, and operating temperature range. External components may be required for specific applications, such as a pull-up resistor on the reset output. This supervisory circuit offers a robust and reliable solution for protecting microprocessors from power supply problems and software errors. Its watchdog timer feature is particularly useful in critical applications where continuous operation is essential.