The SP809EK-L-2-9 is a supervisor circuit manufactured by Exar Corporation. Similar to the SP809EK-L-2-6, it is designed to monitor the voltage levels of power supplies in microprocessor and digital systems. When a voltage fault occurs, it asserts a reset signal to prevent the system from operating with incorrect data or code execution. This ensures system integrity and prevents unpredictable behavior. The key difference between different SP809EK-L-* parts are the voltage thresholds that trigger the reset.

Applications

• Microprocessor Systems
• Digital Signal Processors (DSPs)
• Embedded Systems
• Industrial Control Systems
• Automotive Electronics
• Power Monitoring

Features

• Precision Voltage Monitoring: Accurately monitors supply voltage levels.
• Reset Output: Provides a reset signal to the system when a voltage fault is detected.
• Adjustable Reset Timeout: Allows configuration of the reset pulse duration.
• Low Supply Current: Minimizes power consumption.
• Small Package: Available in a compact package for space-saving designs.
• Manual Reset Input: Provides an external reset capability.

Benefits

• Improved System Reliability: Prevents system malfunctions due to voltage faults.
• Protection Against Data Corruption: Protects data integrity during voltage sags or power failures.
• Simplified System Design: Integrated functionality reduces external component count.
• Lower Power Consumption: Low supply current extends battery life in portable applications.
• Compact Solution: Small package enables integration into space-constrained designs.

Additional Details

The SP809EK-L-2-9 features a precise voltage threshold for accurate voltage monitoring, although this threshold will differ from the SP809EK-L-2-6 part. The reset timeout period can be adjusted to accommodate the reset requirements of different microprocessors and systems. The low supply current minimizes the impact on overall system power consumption. The small package allows for easy integration into a variety of applications. The manual reset input provides a convenient way to reset the system externally. Specific thresholds for voltage detection should be available in the datasheet, along with the operating temperature range and packaging information. It's widely used in applications requiring reliable voltage monitoring and reset functionality.