The SP692AEN-L/TR is a supervisory circuit from Exar Corporation, designed to monitor voltage levels in electronic systems and provide a reset signal to microprocessors or microcontrollers when the voltage falls below a specific threshold. This crucial function ensures that the system initializes properly and prevents data corruption or operational instability caused by insufficient voltage.

Applications

• Microprocessor-based systems
• Embedded systems
• Industrial control equipment
• Automotive electronics
• Portable devices

Features

• Precision voltage monitoring
• Power-on reset generation
• Low power consumption
• Active-low reset output
• Immunity to short negative transients
• Available in small package options

Benefits

• Protects against system malfunctions due to low voltage
• Guarantees reliable system startup
• Minimizes the risk of data corruption
• Simplifies system design
• Improves system stability
• Extends battery life in portable applications

Additional Details

The SP692AEN-L/TR is typically used to monitor 5V power supplies, with a reset threshold voltage around 4.65V. When the supply voltage dips below this threshold, the reset output asserts low, holding the microprocessor in reset. Once the voltage rises back above the threshold, the reset output de-asserts after a specified delay, allowing the microprocessor to commence normal operation. The device's low quiescent current makes it suitable for battery-powered applications. The exact reset delay time is precisely factory-trimmed to give better accuracy. Also, the SP692AEN-L/TR is designed to be immune to short negative transients on the power supply line, which prevents false reset signals. The 'L' suffix usually indicates a lower voltage threshold compared to the standard SP692AEN, while '/TR' signifies that the component is supplied on tape and reel, making it suitable for automated assembly processes. The device is offered in compact surface-mount packages to fit demanding application designs.